Overview

SCIENTIFIC SCORE
Moderately Effective
Based on 5 Researches
8.2
USERS' SCORE
Moderately Good
Based on 125 Reviews
7.9
Supplement Facts
Serving Size: 1 Capsule
Amount Per Serving
%DV
Zinc (as Zinc L-Methionine Sulfate)
15 mg
136%
Copper (as Gluconate)
1 mg
111%

Top Medical Research Studies

8
Zinc treatment impacts flu virus entry
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.
Read More
8
Euglena extract aids flu defense
We set out to uncover how Euglena extract might help combat influenza, particularly focusing on its components like zinc. This microalga, known for its nutritional benefits, has shown promise in alleviating flu symptoms in mice. Our investigation revealed that Euglena extract significantly inhibited various strains of the influenza virus, including those that resist traditional antiviral medications like oseltamivir and amantadine.

Through our research involving Madin-Darby canine kidney (MDCK) cells, we discovered that the extract doesn't disrupt the virus's replication cycle directly. Instead, it appears to bolster the host's defenses, which means it enhances our body's natural ability to fight off the virus. One of the key contributors to this antiviral activity seems to be the minerals present in the extract, particularly zinc.

Overall, this study suggests that Euglena extract could be a promising tool for flu prevention and treatment. Its potential benefits highlight the need for new approaches in tackling influenza, especially with the rise of drug-resistant strains. Our findings advocate for further exploration into how zinc and other components in Euglena can enhance our defenses against influenza.
Read More
We explored the role of zinc in supporting our immune system, especially in the fight against influenza. The studies suggest that zinc might be beneficial in reducing the viral load during flu infections.

Evidence shows that zinc can decrease the severity of symptoms associated with viral pneumonia, which is often a complication of influenza. Additionally, it appears to have a positive impact on the overall recovery process, potentially shortening the duration of illness.

We also noted that zinc may enhance the effectiveness of certain COVID-19 treatments, which gives further credence to its immune-boosting properties. However, the precise relationship between zinc levels and vaccine effectiveness, particularly for flu vaccines, remains complex and requires more investigation.

Ultimately, our understanding indicates that incorporating zinc into our regimen could provide an additional layer of defense against the flu virus while supporting our immune health.
Read More

Most Useful Reviews

7.5
Strong immune support
326 people found this helpful
Excellent product - just be cautious. I doubt you need to take this daily if you have a decent diet. For those with a zinc deficiency, daily intake might be beneficial, but for most, one capsule a week suffices. I feel agitated if I take it more frequently; however, taking it sparingly makes me feel fantastic. This excellent supplement is great for colds, flu, etc. Recently, when I had a nasty cold and fever, I took 2 capsules daily, which effectively eliminated my symptoms. Zinc is vital for a strong immune system, making it indispensable, especially during flu season.
Read More
9
Effective for flu
94 people found this helpful
Works like a miracle! For years, I’ve caught colds 4 times a year, needing antibiotics for upper respiratory infections. This product effectively warded off colds, flu, and airborne diseases, unlike anything I’ve tried before. After testing it twice, I found it works in just 5-6 hours. When I felt a sore throat developing, taking this product improved my condition by 90% within 4-6 hours. I continued using it for a few days, and by then, the flu was gone. I'm grateful to have discovered something so effective.
Read More
9
No illness after flu
19 people found this helpful
My husband, a corrections officer with diabetes, faced constant exposure to illnesses. After a diagnosis of influenza A, I researched zinc supplements to boost his immune system. We chose Jarrows because of its good reputation and appropriate dosing. Since starting late July, he hasn’t fallen ill at all, even while working the covid unit. I even take this daily now! Just remember to take it with food to avoid nausea.
Read More

Medical Researches

SCIENTIFIC SCORE
Moderately Effective
Based on 5 Researches
8.2
  • All Researches
We investigated the potential of zinc in combination with herbal polyphenols and copper to reduce the infectivity of respiratory RNA viruses, including the flu. This study is particularly timely due to the ongoing challenges posed by viruses like SARS-CoV-2, highlighting the need for effective therapeutic solutions.

Zinc ions are known to play a role in modulating viral RNA replication, which makes them an appealing option for decreasing viral loads and infectivity. However, a significant challenge is that the natural concentration of zinc in our cells is often too low for effective results. To tackle this, we combined zinc picolinate, a form of zinc that’s easier for the body to absorb, with a range of flavonoids—natural compounds renowned for their antioxidant properties and existing antiviral effects.

We ensured that these combinations were safe by assessing their impact on cultured cells, confirming that they didn’t harm cell viability. When tested further, our results revealed an impressive 50-95% reduction in viral genome replication levels across a variety of respiratory RNA viruses, including the flu virus, which suggests that this combination therapy could be promising in the fight against such illnesses.

Overall, our findings highlight an innovative approach to treating viral infections that is non-toxic, derived from nature, and may remain effective against emerging viral strains.
Read More
In our evaluation of how zinc can impact flu symptoms, we observed a study that examined the effects of gargling with an antimicrobial mouthwash containing zinc and cetylpyridinium chloride.

A total of 150 individuals participated, divided into two groups: one group followed a regular oral hygiene routine with fluoride toothpaste, while the other group followed the same routine but added gargling with a mouthwash containing 0.075% zinc.

The results revealed that regular gargling with this mouthwash helped reduce the frequency and severity of upper respiratory symptoms, with participants using the mouthwash showing a 21.5% lower frequency and 11% reduced severity in symptoms.

However, it's important to note that the study did not isolate the effects of zinc, leaving questions about the specific contributions of this mineral to the overall findings. Therefore, while we can see that the mouthwash appears beneficial, we cannot definitively attribute its effects solely to zinc.
Read More
8
Zinc treatment impacts flu virus entry
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.
Read More
8
Euglena extract aids flu defense
We set out to uncover how Euglena extract might help combat influenza, particularly focusing on its components like zinc. This microalga, known for its nutritional benefits, has shown promise in alleviating flu symptoms in mice. Our investigation revealed that Euglena extract significantly inhibited various strains of the influenza virus, including those that resist traditional antiviral medications like oseltamivir and amantadine.

Through our research involving Madin-Darby canine kidney (MDCK) cells, we discovered that the extract doesn't disrupt the virus's replication cycle directly. Instead, it appears to bolster the host's defenses, which means it enhances our body's natural ability to fight off the virus. One of the key contributors to this antiviral activity seems to be the minerals present in the extract, particularly zinc.

Overall, this study suggests that Euglena extract could be a promising tool for flu prevention and treatment. Its potential benefits highlight the need for new approaches in tackling influenza, especially with the rise of drug-resistant strains. Our findings advocate for further exploration into how zinc and other components in Euglena can enhance our defenses against influenza.
Read More
We explored the role of zinc in supporting our immune system, especially in the fight against influenza. The studies suggest that zinc might be beneficial in reducing the viral load during flu infections.

Evidence shows that zinc can decrease the severity of symptoms associated with viral pneumonia, which is often a complication of influenza. Additionally, it appears to have a positive impact on the overall recovery process, potentially shortening the duration of illness.

We also noted that zinc may enhance the effectiveness of certain COVID-19 treatments, which gives further credence to its immune-boosting properties. However, the precise relationship between zinc levels and vaccine effectiveness, particularly for flu vaccines, remains complex and requires more investigation.

Ultimately, our understanding indicates that incorporating zinc into our regimen could provide an additional layer of defense against the flu virus while supporting our immune health.
Read More

User Reviews

USERS' SCORE
Moderately Good
Based on 125 Reviews
7.9
  • All Reviews
  • Positive Reviews
  • Negative Reviews
7.5
Strong immune support
326 people found this helpful
Excellent product - just be cautious. I doubt you need to take this daily if you have a decent diet. For those with a zinc deficiency, daily intake might be beneficial, but for most, one capsule a week suffices. I feel agitated if I take it more frequently; however, taking it sparingly makes me feel fantastic. This excellent supplement is great for colds, flu, etc. Recently, when I had a nasty cold and fever, I took 2 capsules daily, which effectively eliminated my symptoms. Zinc is vital for a strong immune system, making it indispensable, especially during flu season.
Read More
9
Effective for flu
94 people found this helpful
Works like a miracle! For years, I’ve caught colds 4 times a year, needing antibiotics for upper respiratory infections. This product effectively warded off colds, flu, and airborne diseases, unlike anything I’ve tried before. After testing it twice, I found it works in just 5-6 hours. When I felt a sore throat developing, taking this product improved my condition by 90% within 4-6 hours. I continued using it for a few days, and by then, the flu was gone. I'm grateful to have discovered something so effective.
Read More
9
No illness after flu
19 people found this helpful
My husband, a corrections officer with diabetes, faced constant exposure to illnesses. After a diagnosis of influenza A, I researched zinc supplements to boost his immune system. We chose Jarrows because of its good reputation and appropriate dosing. Since starting late July, he hasn’t fallen ill at all, even while working the covid unit. I even take this daily now! Just remember to take it with food to avoid nausea.
Read More
8
Supports flu recovery
15 people found this helpful
They say it is a quality zinc since it contains copper for better absorption. My family and I take it at the first signs of flu and to support healthy skin, hair, and nails.
Read More
9
Flu symptom relief
10 people found this helpful
Initially, I took zinc for mineral balance and scalp dryness, but I found it especially effective in reducing flu symptoms. Although it didn't alleviate my scalp condition, it significantly lessened flu symptoms when I fell ill. I appreciate the copper balance in this supplement.
Read More

Frequently Asked Questions

9
Quick recovery
I really liked this zinc. At the first signs of a cold or flu, I take 2 capsules daily, and after three days, I start feeling better, unlike my past experiences of prolonged illness.
9
Effective for flu
Autumn is the season for colds and flu, and zinc helps us immensely! The whole family consumes it! At the first symptoms of ARVI, we notice improvement by the next day.
9
Quick response
1 people found this helpful
Efficient! At the first sign of flu and cough, I take a few capsules with VitD3, and the illness doesn’t progress! I recommend not taking it on an empty stomach if you have a sensitive stomach; I always eat a little something with it.
9
Effective treatment
It works! I take it alongside selenium and vitamin C. I went through the entire winter without any acute respiratory infections or flu, despite the harsh -30°C temperatures. 🤞🤞🤞
9
Decreased illness frequency
Great for immunity! I used to suffer from frequent colds, but since taking vitamin D3 along with zinc, I've noticed a significant decrease in the number of colds and flu. I don’t take Zinc alone but in combination with copper. I consume Zinc + copper five days a week and take two days off on weekends. This combination also aids in quicker healing of my fingers. Overall, zinc enhances my body's resistance, especially in winter.
9
Prevents flu
I take zinc and copper every two days for colds and flu, and I haven’t experienced them in 15 years. Truly effective!
9
Easier illness experience
Perfectly aids recovery! Combined with vitamin C, I take 1-2 capsules daily during illness as recommended by a nutritionist. Colds and flu are much easier to manage! If my review was helpful, please give it a like.
8
Supports flu recovery
15 people found this helpful
They say it is a quality zinc since it contains copper for better absorption. My family and I take it at the first signs of flu and to support healthy skin, hair, and nails.
9
Immune health benefits
4 people found this helpful
I purchased zinc to assist with atopy and dermatitis issues. Zinc deficiency can lead to immune-related diseases, and it is essential for DNA repair and immune function. Evidence shows zinc can prevent adenoviral English colds and boost flu recovery rates. It is advisable to avoid caffeine during zinc intake, as it affects absorption. However, excessive zinc has side effects; moderation is crucial.
9
Prevents flu
Zinc in convenient small capsules with added copper. I usually take a loading dose of 45-60 mg at the first sign of a cold or flu, which prevents the illness from developing.
10
Proven effectiveness
I purchased this medicine for the first time on my doctor's advice. The 15 mg dosage is convenient; children can take 1 capsule, while adults can take 2, especially if dealing with an acute respiratory viral infection or flu. Zinc is recommended as a course twice a year! This supplement is highly effective, I've tested it on my family and it works perfectly. I will buy it again.
In our evaluation of how zinc can impact flu symptoms, we observed a study that examined the effects of gargling with an antimicrobial mouthwash containing zinc and cetylpyridinium chloride.

A total of 150 individuals participated, divided into two groups: one group followed a regular oral hygiene routine with fluoride toothpaste, while the other group followed the same routine but added gargling with a mouthwash containing 0.075% zinc.

The results revealed that regular gargling with this mouthwash helped reduce the frequency and severity of upper respiratory symptoms, with participants using the mouthwash showing a 21.5% lower frequency and 11% reduced severity in symptoms.

However, it's important to note that the study did not isolate the effects of zinc, leaving questions about the specific contributions of this mineral to the overall findings. Therefore, while we can see that the mouthwash appears beneficial, we cannot definitively attribute its effects solely to zinc.
8
Zinc treatment impacts flu virus entry
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 investigated the potential of zinc in combination with herbal polyphenols and copper to reduce the infectivity of respiratory RNA viruses, including the flu. This study is particularly timely due to the ongoing challenges posed by viruses like SARS-CoV-2, highlighting the need for effective therapeutic solutions.

Zinc ions are known to play a role in modulating viral RNA replication, which makes them an appealing option for decreasing viral loads and infectivity. However, a significant challenge is that the natural concentration of zinc in our cells is often too low for effective results. To tackle this, we combined zinc picolinate, a form of zinc that’s easier for the body to absorb, with a range of flavonoids—natural compounds renowned for their antioxidant properties and existing antiviral effects.

We ensured that these combinations were safe by assessing their impact on cultured cells, confirming that they didn’t harm cell viability. When tested further, our results revealed an impressive 50-95% reduction in viral genome replication levels across a variety of respiratory RNA viruses, including the flu virus, which suggests that this combination therapy could be promising in the fight against such illnesses.

Overall, our findings highlight an innovative approach to treating viral infections that is non-toxic, derived from nature, and may remain effective against emerging viral strains.
We explored the role of zinc in supporting our immune system, especially in the fight against influenza. The studies suggest that zinc might be beneficial in reducing the viral load during flu infections.

Evidence shows that zinc can decrease the severity of symptoms associated with viral pneumonia, which is often a complication of influenza. Additionally, it appears to have a positive impact on the overall recovery process, potentially shortening the duration of illness.

We also noted that zinc may enhance the effectiveness of certain COVID-19 treatments, which gives further credence to its immune-boosting properties. However, the precise relationship between zinc levels and vaccine effectiveness, particularly for flu vaccines, remains complex and requires more investigation.

Ultimately, our understanding indicates that incorporating zinc into our regimen could provide an additional layer of defense against the flu virus while supporting our immune health.

References

  1. Muniz FWMG, Casarin M, Pola NM, Rösing CK, Silveira TMD, et al. Efficacy of regular gargling with a cetylpyridinium chloride plus zinc containing mouthwash can reduce upper respiratory symptoms. PLoS One. 2025;20:e0316807. 10.1371/journal.pone.0316807
  2. Nishi K, Yoshimoto S, Nishi S, Nishi T, Nishi R, et al. Epipharyngeal Abrasive Therapy Down-regulates the Expression of Cav1.2: A Key Molecule in Influenza Virus Entry. In Vivo. 2022;36:2357. 10.21873/invivo.12967
  3. Kreiser T, Zaguri D, Sachdeva S, Zamostiano R, Mograbi J, et al. Inhibition of Respiratory RNA Viruses by a Composition of Ionophoric Polyphenols with Metal Ions. Pharmaceuticals (Basel). 2022;15. 10.3390/ph15030377
  4. Nakashima A, Horio Y, Suzuki K, Isegawa Y. Antiviral Activity and Underlying Action Mechanism of Euglena Extract against Influenza Virus. Nutrients. 2021;13. 10.3390/nu13113911
  5. Sadeghsoltani F, Mohammadzadeh I, Safari MM, Hassanpour P, Izadpanah M, et al. Zinc and Respiratory Viral Infections: Important Trace Element in Anti-viral Response and Immune Regulation. Biol Trace Elem Res. 2022;200:2556. 10.1007/s12011-021-02859-z
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