Supplement Facts
Serving Size: 1 Tablet
Amount Per Serving
%DV
Zinc (as zinc glycinate amino acid chelate†)
22 mg
200%
The product is found useful for the following medical conditions
Blurred Vision details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.5
9
Enhanced vision
Most Useful Review
Excellent! This product promotes accelerated immune adaptation, normalises male reproductive function, and increases resistance to infectious diseases. I have experienced improved vision as well as enhanced beauty of skin, hair, and nails. It also aids in synthesising endogenous enzymes and hormones.
Updated: Apr 2025
Chronic Cough details
SCIENTIFIC SCORE
Very Likely Ineffective
Based on 1 Research
2
USERS' SCORE
Good
Based on 2 Reviews
8.5
2
Researchers tested whether zinc acetate could help people suffering from persistent, hard-to-treat cough. In this randomized, placebo-controlled pilot study, 34 participants received either zinc acetate or placebo for 6 weeks, with improvements measured using four different cough and quality-of-life scales.
While zinc successfully increased serum zinc levels in treated participants, both groups improved similarly across all measures. The improvements in cough symptoms and quality of life were too small to meet clinically meaningful thresholds, suggesting zinc acetate offers no real advantage over placebo for chronic cough sufferers.
While zinc successfully increased serum zinc levels in treated participants, both groups improved similarly across all measures. The improvements in cough symptoms and quality of life were too small to meet clinically meaningful thresholds, suggesting zinc acetate offers no real advantage over placebo for chronic cough sufferers.
9
Prevention effectiveness
Most Useful Review
This is the best zinc on iHerb! It's challenging to find. If it appears, don't hesitate. Firstly, it's from Solgar, a trusted brand. Secondly, it's a chelated form, making it better absorbed. My family and I take it regularly. When I contracted Covid, I had no fever, cough, or sore throat. Though I was fatigued for five days, I recovered quickly. I believe the zinc, alongside vitamin D, helped tremendously. Those with my weight often face complications, so please prioritise prevention.
Updated: Apr 2026
Chronic Fatigue Syndrome details
SCIENTIFIC SCORE
Possibly Effective
Based on 7 Researches
7.9
USERS' SCORE
Good
Based on 2 Reviews
8.5
7
We explored the relationship between serum zinc levels and chronic fatigue syndrome (CFS) in a study that compared patients with CFS to normal volunteers. By using an atomic absorption method, we measured serum zinc concentrations and found that those suffering from CFS had significantly lower levels of zinc compared to healthy individuals.
Interestingly, we observed a trend indicating that lower zinc levels correlated with greater CFS severity. Patients also reported a negative correlation between their zinc levels and their subjective experiences of infection. This suggests that zinc plays a role in the immune dysfunction commonly seen in CFS.
Furthermore, we noted that lower serum zinc was associated with higher levels of inflammatory markers and certain defects in the early activation of T cells. Since zinc acts as a potent antioxidant, our findings indicate that CFS is linked to increased oxidative stress in these patients. Given this, it may be beneficial for some CFS patients to consider zinc supplements as part of their treatment approach.
Interestingly, we observed a trend indicating that lower zinc levels correlated with greater CFS severity. Patients also reported a negative correlation between their zinc levels and their subjective experiences of infection. This suggests that zinc plays a role in the immune dysfunction commonly seen in CFS.
Furthermore, we noted that lower serum zinc was associated with higher levels of inflammatory markers and certain defects in the early activation of T cells. Since zinc acts as a potent antioxidant, our findings indicate that CFS is linked to increased oxidative stress in these patients. Given this, it may be beneficial for some CFS patients to consider zinc supplements as part of their treatment approach.
9
Improved well-being
Most Useful Review
Solgar Chelated Zinc features a highly bioavailable form of zinc, chelated for optimal absorption. By incorporating it into my daily routine, I've noticed a significant improvement in my well-being. I feel more resilient against seasonal threats and experience fewer instances of fatigue, highlighting zinc's role in supporting energy metabolism. I truly appreciate Solgar's commitment to quality and purity, with their supplements undergoing rigorous testing for potency and safety. Knowing I'm getting a reliable product with each capsule brings me peace of mind. This high-quality formulation has made a great difference in my health and vitality, making Solgar Chelated Zinc an essential part of my immune support regimen. I wholeheartedly recommend it to anyone looking to enhance their immune system and overall well-being.
Updated: Apr 2025
Knee Pain details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.5
9
Reduced pain
Most Useful Review
34 people found this helpful
Great zinc! After three months of use, the transverse ridges on my nails have disappeared, restoring their structure. I've experienced pain in my small hand joints, but after taking chelating zinc, the discomfort has nearly gone. I plan to continue the supplement with short breaks. I highly recommend it; my hair has grown significantly, resembling the fullness I had at 15. It's an excellent product.
Updated: Apr 2025
Pelvic Pain details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 2 Reviews
8.5
9
Reduced pelvic pain
Most Useful Review
18 people found this helpful
I had suffered from prostatitis for years. After taking this zinc supplement, I noticed the pelvic pain significantly reduced. It seemed to improve my erectile function as well. I discovered a chelating zinc that is cheaper and more effective than domestic options. Now, I feel completely relieved, which is remarkable. I strongly recommend this to others suffering from prostatitis; it truly makes a difference.
Updated: Mar 2025
Sleep Apnea details
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
USERS' SCORE
Good
Based on 5 Reviews
8.5
9
We explored how zinc affects heart function in the context of obstructive sleep apnea (OSA), specifically focusing on cases of intermittent hypoxia (IH). In a detailed study using male rats, researchers set up different groups: a control group and one that underwent 10 weeks of exercise training. Half of the rats in both groups were exposed to IH conditions to simulate the effects of sleep apnea.
The results were eye-opening. Rats that experienced IH showed notable impairment in their heart's left ventricular function, characterized by reduced ejection fraction and increased inflammation. However, when treated with zinc, these negative effects were significantly countered. Notably, those who exercised and received zinc treatment displayed improved heart function and antioxidant capabilities compared to their counterparts that did not receive zinc.
On the flip side, exercise alone did not provide the same protective benefits when zinc was absent. The findings suggest that zinc is essential not only for the heart's protection against the damaging effects of IH but also enhances the benefits of physical exercise. This research indicates the importance of zinc in potentially managing heart health in individuals suffering from sleep apnea.
The results were eye-opening. Rats that experienced IH showed notable impairment in their heart's left ventricular function, characterized by reduced ejection fraction and increased inflammation. However, when treated with zinc, these negative effects were significantly countered. Notably, those who exercised and received zinc treatment displayed improved heart function and antioxidant capabilities compared to their counterparts that did not receive zinc.
On the flip side, exercise alone did not provide the same protective benefits when zinc was absent. The findings suggest that zinc is essential not only for the heart's protection against the damaging effects of IH but also enhances the benefits of physical exercise. This research indicates the importance of zinc in potentially managing heart health in individuals suffering from sleep apnea.
9
Deep sleep support
Most Useful Review
Perfect! This product really helps me to sleep deeply. I love it! In just a few days, I felt the full effect. I prefer this size. 👍
Updated: Apr 2025
Allergies details
SCIENTIFIC SCORE
Moderately Effective
Based on 7 Researches
8.4
USERS' SCORE
Good
Based on 5 Reviews
8.4
9
We investigated how intranasal zinc (Zn) treatment affects symptoms of allergic rhinitis (AR), specifically focusing on individuals suffering from Japanese cedar pollinosis (JCP), a common seasonal allergy. In our study, we monitored 57 control subjects and 44 patients from preseason through the allergy season, observing the levels of Zn in both nasal fluid and serum.
Our findings showed that after exposure to pollen, the level of zinc in the nasal lining fluid of JCP patients significantly increased, while their serum zinc levels notably decreased compared to the control group during the JCP season. To delve deeper, we used model mice that could mimic these changes and the allergy symptoms of the patients.
The results from this mouse study were promising. We observed that treating these mice with a dose of zinc, similar to what humans might use, led to a notable improvement in their allergy symptoms. Additionally, the number of mucin-secreting goblet cells, which indicate a response to allergies, significantly decreased following the zinc treatment.
Our study points towards the potential of using intranasal zinc as a way to alleviate allergy symptoms, suggesting a new approach to managing allergic rhinitis.
Our findings showed that after exposure to pollen, the level of zinc in the nasal lining fluid of JCP patients significantly increased, while their serum zinc levels notably decreased compared to the control group during the JCP season. To delve deeper, we used model mice that could mimic these changes and the allergy symptoms of the patients.
The results from this mouse study were promising. We observed that treating these mice with a dose of zinc, similar to what humans might use, led to a notable improvement in their allergy symptoms. Additionally, the number of mucin-secreting goblet cells, which indicate a response to allergies, significantly decreased following the zinc treatment.
Our study points towards the potential of using intranasal zinc as a way to alleviate allergy symptoms, suggesting a new approach to managing allergic rhinitis.
9
Well-tolerated solution
Most Useful Review
Our paediatrician recommended a vitamin and mineral complex that includes zinc in high doses for my daughter, who has allergies. Finding the right one was challenging because all products with dyes and flavours were unsuitable for her. After several tries, we discovered this particular supplement that did not cause any allergies and was well tolerated. I highly recommend it!
Updated: Mar 2026
Brain Tumor details
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
USERS' SCORE
Good
Based on 3 Reviews
8.4
9
We evaluated the potential of zinc in combination with a ketogenic diet and oxyresveratrol in fighting glioblastoma, a highly aggressive brain tumor. Through a series of carefully designed experiments, we examined how these treatments affect tumor growth and overall brain function.
In our study, we induced brain tumors in Wistar rats and then applied our treatment regimen. We tracked various outcomes, including tumor size, proliferation rates, memory function, and motor coordination. By assessing glucose and ketone levels, we gained insights into the metabolic changes occurring as a result of the treatments.
The findings suggested that zinc played a supportive role alongside the ketogenic diet and oxyresveratrol in reducing tumor growth. Moreover, these treatments appeared to enhance memory and motor coordination, indicating a multi-faceted benefit. Overall, this progression offered valuable information about the role of diet and supplementary compounds in battling aggressive brain tumors like glioblastoma.
In our study, we induced brain tumors in Wistar rats and then applied our treatment regimen. We tracked various outcomes, including tumor size, proliferation rates, memory function, and motor coordination. By assessing glucose and ketone levels, we gained insights into the metabolic changes occurring as a result of the treatments.
The findings suggested that zinc played a supportive role alongside the ketogenic diet and oxyresveratrol in reducing tumor growth. Moreover, these treatments appeared to enhance memory and motor coordination, indicating a multi-faceted benefit. Overall, this progression offered valuable information about the role of diet and supplementary compounds in battling aggressive brain tumors like glioblastoma.
9
Essential for brain
Most Useful Review
This high-quality zinc supplement is fantastic; it increases immunity and is essential for brain function and physical activity.
Updated: Mar 2026
Depression details
SCIENTIFIC SCORE
Possibly Effective
Based on 7 Researches
7.9
USERS' SCORE
Good
Based on 3 Reviews
8.4
7
We aimed to uncover the connection between dietary zinc deficiency and symptoms associated with major depressive disorder (MDD). In our study, we used rats fed either a zinc-adequate diet or one deficient in zinc for four weeks.
We then analyzed the changes in protein expression in the prefrontal cortex and hippocampus—two brain areas closely linked to depression. This approach allowed us to see how zinc deficiency impacts the brain at a molecular level.
Our findings revealed that significant alterations occurred in proteins related to zinc transport and mitochondrial function due to the deficiency. In particular, we saw a notable decline in the activity of complex I of the mitochondrial energy production pathway in the prefrontal cortex.
These results suggest that low zinc levels can disrupt vital brain functions, potentially contributing to the development of depressive symptoms. This highlights the importance of maintaining adequate zinc levels for mental health.
We then analyzed the changes in protein expression in the prefrontal cortex and hippocampus—two brain areas closely linked to depression. This approach allowed us to see how zinc deficiency impacts the brain at a molecular level.
Our findings revealed that significant alterations occurred in proteins related to zinc transport and mitochondrial function due to the deficiency. In particular, we saw a notable decline in the activity of complex I of the mitochondrial energy production pathway in the prefrontal cortex.
These results suggest that low zinc levels can disrupt vital brain functions, potentially contributing to the development of depressive symptoms. This highlights the importance of maintaining adequate zinc levels for mental health.
9
Recommended for depression
Most Useful Review
8 people found this helpful
I really like this product! I would definitely recommend purchasing it. The company doesn’t need marketing as it effectively saves me from depression! If my review has been helpful, please give it a thumbs up. I would appreciate it! Also, for a discount of 5-10% on your order, visit my profile for a reusable promotional code!
Updated: Apr 2025
Acne details
SCIENTIFIC SCORE
Possibly Effective
Based on 21 Researches
7.5
USERS' SCORE
Good
Based on 15 Reviews
8.3
8
We explored how zinc affects acne through a systematic review and meta-analysis that looked at two main questions. First, we wanted to know if there are differences in zinc levels between people with acne and those without. Second, we examined how effective zinc treatments are for managing acne.
Our findings showed that individuals with acne had noticeably lower serum zinc levels compared to those in the control group. Furthermore, when we looked at treatments, those who received zinc showed a significant reduction in their inflammatory papule count—a common symptom of acne. Importantly, we noted that side effects from zinc supplementation were similar to those seen in other treatments, suggesting that zinc is safe to use.
Overall, acne patients appear to benefit from improved zinc levels, especially when zinc is used either on its own or alongside other acne treatments. This gives hope for those looking for effective ways to tackle acne issues!
Our findings showed that individuals with acne had noticeably lower serum zinc levels compared to those in the control group. Furthermore, when we looked at treatments, those who received zinc showed a significant reduction in their inflammatory papule count—a common symptom of acne. Importantly, we noted that side effects from zinc supplementation were similar to those seen in other treatments, suggesting that zinc is safe to use.
Overall, acne patients appear to benefit from improved zinc levels, especially when zinc is used either on its own or alongside other acne treatments. This gives hope for those looking for effective ways to tackle acne issues!
8
Effective for problem skin
Most Useful Review
52 people found this helpful
For my acne-prone back, this supplement has been fantastic. Initially sceptical, I saw a 50% reduction in rashes within two weeks! Switching from prescription zinc to this dietary version has been a game changer and is yielding positive results without side effects.
Updated: Apr 2026
Bacterial Infection details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 3 Reviews
8.3
7.5
Significant health improvement
Most Useful Review
11 people found this helpful
Excellent zinc! I first bought it in June 2021 when I fell ill with Covid. I purchased it from a local pharmacy, which was pricier than iHerb. After just three days of taking it alongside vitamin C, I felt noticeably better; my hair loss, which had started before Covid, ceased, and facial rashes reduced. I found it gentle on my stomach. In July, my mother caught a viral infection and started taking the same zinc with vitamin C, reporting similar improvements in her condition, with lessened ARVI symptoms and a quicker recovery. I've now ordered Zinc 250 Tablets from iHerb.
Updated: Mar 2026
Cold details
SCIENTIFIC SCORE
Moderately Effective
Based on 3 Researches
8.3
USERS' SCORE
Good
Based on 188 Reviews
8.3
8
We explored how zinc might help in treating and preventing the common cold. The study focused on zinc's effects, isolating it from other treatments to understand its true impact on cold symptoms. By doing this, the researchers aimed to clarify whether zinc could genuinely shorten the duration of a cold or alleviate its symptoms.
The findings were intriguing but showed that zinc might not yield significant benefits for everyone. While some individuals reported a slight reduction in cold symptoms, the evidence did not strongly support zinc as an effective treatment overall.
This means that, for those seeking relief from a nasty cold, zinc alone might not be the go-to solution we hoped it would be. It’s essential to consider this information when deciding on a cold treatment plan and to approach zinc with realistic expectations.
The findings were intriguing but showed that zinc might not yield significant benefits for everyone. While some individuals reported a slight reduction in cold symptoms, the evidence did not strongly support zinc as an effective treatment overall.
This means that, for those seeking relief from a nasty cold, zinc alone might not be the go-to solution we hoped it would be. It’s essential to consider this information when deciding on a cold treatment plan and to approach zinc with realistic expectations.
10
Increased immunity
Most Useful Review
255 people found this helpful
Zinc is a cofactor for over 300 enzymes in the body and beneficial for the skin. It's involved in cell growth and DNA formation, with antioxidant properties that support the immune and reproductive systems in men. The chelated form in this formula optimises absorption. The tablets are convenient and easy to swallow. My immunity increased significantly; I took it alongside vitamin D3 and didn’t get colds throughout winter! Although it didn't help with my hair loss, I recommend this excellent zinc supplement.
Updated: Mar 2026
Flu details
SCIENTIFIC SCORE
Moderately Effective
Based on 6 Researches
8
USERS' SCORE
Good
Based on 6 Reviews
8.3
8
In our study, we examined how epipharyngeal abrasive therapy (EAT), which includes the use of zinc chloride, affects the expression of a key molecule known as Cav1.2. This molecule is essential for the influenza virus to enter cells, making it a crucial target in flu prevention strategies.
We compared two groups of patients: those who received EAT and those who did not. Our findings revealed that the levels of Cav1.2 were significantly lower in the EAT group, at a striking 4.19 times less than in the non-treated group. This suggests that the squamous metaplasia induced by EAT—which is a process of changing the epithelium—could be a beneficial approach to limiting flu infections.
The results of the study highlight zinc's potential indirect role in flu prevention by remarking on its contribution to lowering the expression of a critical receptor for the virus. Although we didn't isolate the effects of zinc alone, the findings indicate that treatments involving zinc, like EAT, may offer a straightforward way to help limit the impact of influenza.
We compared two groups of patients: those who received EAT and those who did not. Our findings revealed that the levels of Cav1.2 were significantly lower in the EAT group, at a striking 4.19 times less than in the non-treated group. This suggests that the squamous metaplasia induced by EAT—which is a process of changing the epithelium—could be a beneficial approach to limiting flu infections.
The results of the study highlight zinc's potential indirect role in flu prevention by remarking on its contribution to lowering the expression of a critical receptor for the virus. Although we didn't isolate the effects of zinc alone, the findings indicate that treatments involving zinc, like EAT, may offer a straightforward way to help limit the impact of influenza.
9
High-quality zinc
Most Useful Review
2 people found this helpful
Excellent! Chelated zinc from Solgar is the best. An excellent dose of 22 mg meets the body's needs for zinc. I take one tablet for 30 days, followed by a month’s break, and repeat. My immunity is high; I haven't even caught the flu. My hair and nails improved significantly, and my skin rash disappeared. I highly recommend this product.
Updated: Mar 2026
Anemia details
SCIENTIFIC SCORE
Questionable
Based on 7 Researches
6.6
USERS' SCORE
Good
Based on 2 Reviews
8.2
9
We explored the connection between zinc deficiency and anemia through the case of an 18-year-old woman who faced a series of health issues, including urinary tract infections and insulin dysfunction. After a thorough assessment, she was diagnosed with zinc deficiency, shedding light on how this overlooked issue can impact overall health.
What stood out to us was the rapid recovery the patient experienced after beginning oral zinc supplementation. Zinc plays a critical role in numerous bodily functions, including immune support and protein regulation. By addressing her deficiency, we observed significant improvement in her symptoms, including anemia.
The patient’s diet contained high levels of substances that were inhibiting her zinc absorption, which likely contributed to her condition. This case emphasizes the importance of recognizing zinc deficiency as a potential underlying cause for unexplained health issues, particularly anemia. Prompt diagnosis and treatment can lead to a complete turnaround in the patient's health.
By sharing this experience, we hope to raise awareness among clinicians about the vital role of zinc in managing anemia and encourage timely interventions for patients showing diverse symptoms.
What stood out to us was the rapid recovery the patient experienced after beginning oral zinc supplementation. Zinc plays a critical role in numerous bodily functions, including immune support and protein regulation. By addressing her deficiency, we observed significant improvement in her symptoms, including anemia.
The patient’s diet contained high levels of substances that were inhibiting her zinc absorption, which likely contributed to her condition. This case emphasizes the importance of recognizing zinc deficiency as a potential underlying cause for unexplained health issues, particularly anemia. Prompt diagnosis and treatment can lead to a complete turnaround in the patient's health.
By sharing this experience, we hope to raise awareness among clinicians about the vital role of zinc in managing anemia and encourage timely interventions for patients showing diverse symptoms.
9
Prevented iron deficiency
Most Useful Review
Chelated zinc and Spirulina provide essential iron, crucial for those lacking this element. Spirulina is not only popular in cosmetology but also positively impacts overall body function. Regular consumption helps prevent iron deficiency, alleviating anemia, enhancing stress resilience, and promoting healing.
Updated: Apr 2025
Cancer details
SCIENTIFIC SCORE
Moderately Effective
Based on 6 Researches
8.2
USERS' SCORE
Good
Based on 2 Reviews
8.2
8
We explored how zinc levels impact cancer cells and immune function, particularly focusing on macrophages, which are crucial for our body’s defense against tumors. Our research revealed that cancer cells often have decreased expression of specific genes tied to immune response, and this links to resistance against therapies designed to unblock immune checkpoints.
By upregulating a zinc importer known as SLC39A9, these cancer cells manage to hoard zinc for themselves, leaving the surrounding tumor microenvironment (TME) depleted of this vital nutrient. This competition for zinc results in macrophages becoming zinc-starved, which diminishes their ability to perform essential tasks like engulfing and destroying cancer cells.
Interestingly, we found that when we replenished zinc levels in the TME—through a dietary intervention—these macrophages could regain their pro-phagocytic function. This change significantly improved the response of certain tumors to immunotherapy treatments. Notably, T cells weren’t required for this transformation, indicating that macrophages alone play a pivotal role.
Our results are clinically relevant, showing that cancer patients with reduced zinc levels in their body tend to experience worse outcomes. Overall, we identified a new mechanism by which cancer cells can disrupt immune function, highlighting zinc’s critical role in both tumor environments and immunotherapy effectiveness.
By upregulating a zinc importer known as SLC39A9, these cancer cells manage to hoard zinc for themselves, leaving the surrounding tumor microenvironment (TME) depleted of this vital nutrient. This competition for zinc results in macrophages becoming zinc-starved, which diminishes their ability to perform essential tasks like engulfing and destroying cancer cells.
Interestingly, we found that when we replenished zinc levels in the TME—through a dietary intervention—these macrophages could regain their pro-phagocytic function. This change significantly improved the response of certain tumors to immunotherapy treatments. Notably, T cells weren’t required for this transformation, indicating that macrophages alone play a pivotal role.
Our results are clinically relevant, showing that cancer patients with reduced zinc levels in their body tend to experience worse outcomes. Overall, we identified a new mechanism by which cancer cells can disrupt immune function, highlighting zinc’s critical role in both tumor environments and immunotherapy effectiveness.
7.5
Supports immune health
Most Useful Review
Zinc is essential for immune system activity. It aids in the maturation and functioning of white blood cells (T cells) that have immune memory, as well as participating in the creation of antibodies and natural killer cells that target infected and cancerous cells. Additionally, zinc is vital for skin, hair, nails, and eye health and assists with tissue recovery.
Updated: Apr 2025
Rash details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Good
Based on 11 Reviews
8.2
9
No side effects noted
Most Useful Review
5 people found this helpful
I initially cannot fully appreciate the overall effect, as I took it for the first time alongside chlorophyll that contains a lot of copper. I took zinc to prevent deficiency. The small white tablets are easy to swallow with no nausea afterwards—unlike a previous brand that caused nausea and vomiting. I also noticed that taking zinc in double doses when ill leads to faster recovery. My skin has improved, reduced oiliness, and the rashes have disappeared. It's a reputable brand, and the jar is large with no issues.
Updated: Mar 2026
Cold Sores details
SCIENTIFIC SCORE
Moderately Effective
Based on 9 Researches
8.2
USERS' SCORE
Good
Based on 3 Reviews
8.1
9
We conducted a double-blind, placebo-controlled clinical trial to explore the effectiveness of a zinc oxide/glycine cream in treating cold sores caused by facial and circumoral herpes. By dividing 46 participants into two groups, one receiving the zinc treatment and the other a placebo, we aimed to measure how this formulation affected the duration and severity of cold sore symptoms.
Our results were quite promising! Participants who began using the zinc oxide/glycine cream within the first 24 hours of noticing symptoms experienced cold sore lesions that lasted only an average of 5 days, compared to 6.5 days for those on the placebo. Additionally, we noticed a significant reduction in the overall severity of their symptoms, including blistering, soreness, itching, and tingling.
As for side effects, subjects treated with the zinc cream experienced only minor and reversible issues typical of ionic zinc salt solutions. This indicates that the zinc oxide/glycine cream is not only effective but also safe for treating cold sores, presenting a valuable option for many people seeking relief from this common condition.
Our results were quite promising! Participants who began using the zinc oxide/glycine cream within the first 24 hours of noticing symptoms experienced cold sore lesions that lasted only an average of 5 days, compared to 6.5 days for those on the placebo. Additionally, we noticed a significant reduction in the overall severity of their symptoms, including blistering, soreness, itching, and tingling.
As for side effects, subjects treated with the zinc cream experienced only minor and reversible issues typical of ionic zinc salt solutions. This indicates that the zinc oxide/glycine cream is not only effective but also safe for treating cold sores, presenting a valuable option for many people seeking relief from this common condition.
8
Improved male health
Most Useful Review
14 people found this helpful
Helped me with a cold, and my boyfriend is thrilled with the result – these are excellent male vitamins. This Zinc delivers a good effect and helped him overcome a cold in two days. He noticed a significant difference after just five days, stating that men should monitor their zinc levels. However, we did notice some tingling in his side after taking it for five consecutive days, which we are monitoring. Overall, these vitamins are highly commendable.
Updated: Apr 2025
Nausea details
SCIENTIFIC SCORE
Questionable
Based on 4 Researches
5.5
USERS' SCORE
Good
Based on 12 Reviews
8.1
7
Zinc treatment reduces nausea risk
We conducted a study to evaluate how effective NPC-25, a new form of zinc, is compared to a well-known treatment, NOBELZIN™, for patients with low zinc levels. Participants in this trial had their zinc levels checked and were grouped to receive either NPC-25 or NOBELZIN™.
For a period of up to 24 weeks, we aimed to maintain their zinc levels within a specific target range while closely monitoring for side effects. One of our main goals was to see if NPC-25 could maintain these target zinc levels similarly to NOBELZIN™.
Our findings revealed that NPC-25 was indeed non-inferior to NOBELZIN™, meaning it worked just as well. Importantly, we also observed that those taking NPC-25 reported fewer digestive issues, like nausea and vomiting. This suggests that while both treatments were effective, NPC-25 might be the gentler option.
For a period of up to 24 weeks, we aimed to maintain their zinc levels within a specific target range while closely monitoring for side effects. One of our main goals was to see if NPC-25 could maintain these target zinc levels similarly to NOBELZIN™.
Our findings revealed that NPC-25 was indeed non-inferior to NOBELZIN™, meaning it worked just as well. Importantly, we also observed that those taking NPC-25 reported fewer digestive issues, like nausea and vomiting. This suggests that while both treatments were effective, NPC-25 might be the gentler option.
9
No nausea
Most Useful Review
1 people found this helpful
Very good and affordable! I've been using it for a year and find it beneficial to my health. It’s easy to take, and I have experienced no nausea when consumed after meals.
Updated: Mar 2026
Prostate Cancer details
SCIENTIFIC SCORE
Moderately Effective
Based on 1 Research
8
USERS' SCORE
Good
Based on 6 Reviews
8.1
8
We explored the relationship between zinc levels and prostate cancer treatments, particularly focusing on a novel compound known as 3D. This compound showed a strong potential to target prostate cancer cells, contributing to a decrease in their proliferation rates.
Our analysis revealed that compound 3D selectively impacted key metabolic processes in prostate cancer cells by suppressing factors related to energy production, such as lactate levels. Interestingly, it also reduced the activity of transporters involved in zinc absorption while leaving those responsible for zinc export untouched.
We also found that the effectiveness of 3D could be reversed with zinc treatment, highlighting a complicated interaction between zinc and this therapeutic approach. While the compound successfully lowered zinc levels in cells and inhibited cancer growth, it is essential to note that we did not find significant benefits from zinc treatment by itself in the context of this study.
Overall, our findings suggest that targeting zinc metabolism and enhancing heme oxygenase-1 expression could be a promising strategy in prostate cancer therapy, more so than the direct application of zinc itself. The results illustrate the potential for combining innovative small molecules with an understanding of cancer metabolism in the development of treatment strategies.
Our analysis revealed that compound 3D selectively impacted key metabolic processes in prostate cancer cells by suppressing factors related to energy production, such as lactate levels. Interestingly, it also reduced the activity of transporters involved in zinc absorption while leaving those responsible for zinc export untouched.
We also found that the effectiveness of 3D could be reversed with zinc treatment, highlighting a complicated interaction between zinc and this therapeutic approach. While the compound successfully lowered zinc levels in cells and inhibited cancer growth, it is essential to note that we did not find significant benefits from zinc treatment by itself in the context of this study.
Overall, our findings suggest that targeting zinc metabolism and enhancing heme oxygenase-1 expression could be a promising strategy in prostate cancer therapy, more so than the direct application of zinc itself. The results illustrate the potential for combining innovative small molecules with an understanding of cancer metabolism in the development of treatment strategies.
9
Improves urination
Most Useful Review
1 people found this helpful
The prostate truly improves. My urine flow is excellent! The effect is remarkable.
Updated: Mar 2026
Hair Loss details
SCIENTIFIC SCORE
Possibly Effective
Based on 9 Researches
7.6
USERS' SCORE
Moderately Good
Based on 41 Reviews
7.9
9
We explored how zinc acetate hydrate impacts hair loss for patients experiencing symptoms after COVID-19. In our analysis, we looked at 120 symptomatic outpatients over 12 weeks, observing their recovery patterns and any improvements in their symptoms. The focus was on various lingering effects, including fatigue and hair loss, particularly how zinc could potentially alleviate these issues.
Our findings highlighted significant improvements in hair loss for those treated with zinc acetate hydrate at multiple checkpoints (4, 8, and 12 weeks) compared to those who did not receive this treatment. The results were statistically significant and suggested that zinc could be a useful option for those struggling with hair loss post-COVID-19.
Additionally, we noted improvements in fatigue among those receiving zinc, although this was not as pronounced at all time intervals. As a whole, our study emphasized zinc's beneficial effects, particularly for hair loss, providing promising insights for anyone dealing with these challenging post-viral symptoms.
Our findings highlighted significant improvements in hair loss for those treated with zinc acetate hydrate at multiple checkpoints (4, 8, and 12 weeks) compared to those who did not receive this treatment. The results were statistically significant and suggested that zinc could be a useful option for those struggling with hair loss post-COVID-19.
Additionally, we noted improvements in fatigue among those receiving zinc, although this was not as pronounced at all time intervals. As a whole, our study emphasized zinc's beneficial effects, particularly for hair loss, providing promising insights for anyone dealing with these challenging post-viral symptoms.
9
Stopped hair loss
Most Useful Review
22 people found this helpful
Wonderful Zinc! Having been on zinc for 2.5 months, I've noticed significant improvements in my wellbeing, mood, and hair quality without hair loss. I feel calmer and more resilient. My hair growth has accelerated, and my skin has improved—blemishes that frequently appeared have vanished. I am very pleased with the outcomes.
Updated: Mar 2026
Common Cold details
SCIENTIFIC SCORE
Possibly Effective
Based on 6 Researches
7.3
USERS' SCORE
Moderately Good
Based on 2 Reviews
7.8
9
We explored how zinc lozenges affect the duration of the common cold through a detailed analysis of multiple trials. In particular, we focused on the Mossad (1996) trial involving zinc gluconate lozenges, which revealed an average reduction of cold duration by about 4.0 days. While that sounds promising, our findings through a quantile treatment effect (QTE) analysis tell a more nuanced story.
Interestingly, the QTE analysis showed that for individuals suffering from lengthy colds lasting 15 to 17 days, the zinc lozenges could shorten their illness by as much as 8 days. On the flip side, those with shorter, 2-day colds only experienced a 1-day reduction in sickness. This suggests that while zinc may help, its effectiveness varies significantly depending on the initial duration of the cold, making the overall average effect less informative than we might think.
Our examination extended to three trials that used zinc acetate lozenges, yielding a similar average reduction of around 2.7 days. However, again, those averages concealed varying effects for short and long colds, highlighting the importance of looking beyond simple averages in treatment studies.
Overall, we observed that zinc lozenges can indeed help with cold duration, but the extent of that help is very much dependent on how long a person has been suffering. This approach to understanding treatment effects through QTE analysis could have important implications not just for cold treatment but also for analyzing other health outcomes.
Interestingly, the QTE analysis showed that for individuals suffering from lengthy colds lasting 15 to 17 days, the zinc lozenges could shorten their illness by as much as 8 days. On the flip side, those with shorter, 2-day colds only experienced a 1-day reduction in sickness. This suggests that while zinc may help, its effectiveness varies significantly depending on the initial duration of the cold, making the overall average effect less informative than we might think.
Our examination extended to three trials that used zinc acetate lozenges, yielding a similar average reduction of around 2.7 days. However, again, those averages concealed varying effects for short and long colds, highlighting the importance of looking beyond simple averages in treatment studies.
Overall, we observed that zinc lozenges can indeed help with cold duration, but the extent of that help is very much dependent on how long a person has been suffering. This approach to understanding treatment effects through QTE analysis could have important implications not just for cold treatment but also for analyzing other health outcomes.
9
Family use
Most Useful Review
Our whole family takes this from autumn to spring, and we’ve stopped suffering from the common cold. It truly works well.
Updated: Mar 2026
Adenoiditis details
SCIENTIFIC SCORE
No researches found
N/A
USERS' SCORE
Moderately Good
Based on 2 Reviews
7.4
7.5
Moderate effectiveness
Most Useful Review
It is certainly effective for adenoiditis, but I find it difficult to swallow, as it tends to hook in my throat.
Updated: Mar 2026
Heartburn details
SCIENTIFIC SCORE
Likely Very Effective
Based on 1 Research
9
USERS' SCORE
Moderately Good
Based on 2 Reviews
7.2
9
We investigated how zinc affects heartburn through the case of a 76-year-old Japanese man who experienced significant discomfort after undergoing a total gastrectomy. For two weeks, he suffered from a sore throat, heartburn, and difficulty swallowing. Endoscopy revealed deep, craterlike ulcers in his esophagus, but tests for viral infections were negative.
After initial treatment, his symptoms returned, prompting further investigation. Eventually, we found that his serum zinc level was low at 38 µg/dL, which led to a diagnosis of zinc deficiency. Following oral zinc supplementation, the patient reported relief from his symptoms and a noticeable improvement in the esophageal ulcers observed during a follow-up endoscopy.
Over the five years since his treatment, the patient has continued to take zinc supplements and has not faced similar issues again. This case suggests that zinc can play a crucial role in treating heartburn issues related to ulcers, especially in those with a deficiency.
After initial treatment, his symptoms returned, prompting further investigation. Eventually, we found that his serum zinc level was low at 38 µg/dL, which led to a diagnosis of zinc deficiency. Following oral zinc supplementation, the patient reported relief from his symptoms and a noticeable improvement in the esophageal ulcers observed during a follow-up endoscopy.
Over the five years since his treatment, the patient has continued to take zinc supplements and has not faced similar issues again. This case suggests that zinc can play a crucial role in treating heartburn issues related to ulcers, especially in those with a deficiency.
2
Relieved heartburn quickly
Most Useful Review
4 people found this helpful
I took one tablet daily, along with Omega 3 and chelated magnesium from the same brand. After a month, I started feeling a heaviness in my stomach accompanied by heartburn. I ceased taking all supplements at once and soon after, my stomach condition returned to normal. I have no intention of taking these products again.
Updated: Apr 2025
Autoimmune Disorder details
SCIENTIFIC SCORE
Possibly Effective
Based on 6 Researches
7.5
USERS' SCORE
Medium or Average
Based on 4 Reviews
6.9
9
Zinc supplementation benefits MS models
We explored how dietary zinc levels influence spinal cord damage and gene expressions associated with Multiple Sclerosis (MS) using a cuprizone-induced rat model. The study included 46 adult male Wistar rats divided into five groups, with some receiving zinc supplementation while others followed a zinc-deficient diet.
After eight weeks of treatment, we found that the rats with MS symptoms showed elevated markers of tissue damage and inflammation, particularly in the groups that lacked zinc. Notably, those receiving zinc supplementation exhibited significantly reduced levels of harmful substances, bringing them back closer to control levels.
Our findings highlight zinc's protective effects in a model of MS, suggesting that incorporating zinc into treatment plans could help alleviate some symptoms associated with this autoimmune disorder. This is promising for future treatment strategies for those affected by MS.
After eight weeks of treatment, we found that the rats with MS symptoms showed elevated markers of tissue damage and inflammation, particularly in the groups that lacked zinc. Notably, those receiving zinc supplementation exhibited significantly reduced levels of harmful substances, bringing them back closer to control levels.
Our findings highlight zinc's protective effects in a model of MS, suggesting that incorporating zinc into treatment plans could help alleviate some symptoms associated with this autoimmune disorder. This is promising for future treatment strategies for those affected by MS.
9
Thyroid function improvement
Most Useful Review
1 people found this helpful
I have autoimmune thyroiditis and my endocrinologist recommended daily zinc and selenium. I chose the chelated form for better absorption. My TSH levels returned to normal after a few months, and I suspect it contributed positively, though I take a variety of supplements as well. I find this product convenient and effective.
Updated: Mar 2026
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