Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 5 Researches
8.2
USERS' SCORE
Good
Based on 12 Reviews
8.3
Supplement Facts
Serving Size: 1 Tablet
Amount Per Serving
%DV
Zinc (as zinc methionine sulfate complex [OptiZinc®])
30 mg
273%
Copper (as copper citrate)
300 mcg
33%
Top Medical Research Studies
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.
Read More
8
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.
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
8
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.
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
Helpful for infections
I bought this product due to its price. If you have an infection or the flu, it genuinely helps. Just be careful not to overdose. I also appreciate the easy-to-swallow small tablets, particularly when suffering from a sore throat.
Read More
9
Stomach-friendly supplement
2 people found this helpful
I had difficulties taking zinc due to stomach pain and reflux but found OptiZinc tolerable. It didn't irritate my stomach lining, allowing me to benefit from zinc’s vital role in white blood cell production, thus enhancing my defence against pathogens. Given the current rise in Covid cases, supplementing with zinc is essential for our health. I'm grateful for this product, and it motivates me to share my experiences further.
Read More
9
Avoided flu illness
1 people found this helpful
I recently started taking OptiZinc by Source Naturals and noticed remarkable improvements. This product contains zinc bound to L-methionine for better absorption. After trying various zinc supplements, OptiZinc proved to be the best, enhancing my skin's condition and overall well-being. I felt more energetic and supported my immune system with an extra dose of zinc during cold and flu season. The tablets are easy to swallow, and with one a day, I achieved great results. Importantly, it has no unpleasant aftertaste, and I highly recommend it for anyone wanting to boost their health and immunity.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 5 Researches
8.2
- All Researches
9
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.
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
8
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.
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
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.
Read More
8
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.
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
8
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.
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
Good
Based on 12 Reviews
8.3
- All Reviews
- Positive Reviews
- Negative Reviews
7.5
Helpful for infections
I bought this product due to its price. If you have an infection or the flu, it genuinely helps. Just be careful not to overdose. I also appreciate the easy-to-swallow small tablets, particularly when suffering from a sore throat.
Read More
9
Stomach-friendly supplement
2 people found this helpful
I had difficulties taking zinc due to stomach pain and reflux but found OptiZinc tolerable. It didn't irritate my stomach lining, allowing me to benefit from zinc’s vital role in white blood cell production, thus enhancing my defence against pathogens. Given the current rise in Covid cases, supplementing with zinc is essential for our health. I'm grateful for this product, and it motivates me to share my experiences further.
Read More
9
Avoided flu illness
1 people found this helpful
I recently started taking OptiZinc by Source Naturals and noticed remarkable improvements. This product contains zinc bound to L-methionine for better absorption. After trying various zinc supplements, OptiZinc proved to be the best, enhancing my skin's condition and overall well-being. I felt more energetic and supported my immune system with an extra dose of zinc during cold and flu season. The tablets are easy to swallow, and with one a day, I achieved great results. Importantly, it has no unpleasant aftertaste, and I highly recommend it for anyone wanting to boost their health and immunity.
Read More
9
Eliminates viral infections
1 people found this helpful
An amazing product for the flu season! It keeps cells healthy and helps eliminate viral infections. Zinc it up! 😎😎😎
Read More
9
No illness
Read More
Frequently Asked Questions
7.5
Improved cold symptoms
I took these immediately for my ongoing cold and flu symptoms, and I noticed significant improvement within four days.
7.5
Reduces inactivity time
1 people found this helpful
Optizinc is the most assimilable zinc formula, enhanced with copper for effective immunity support. When I catch flu or a cold, I take one pill daily, which significantly reduces my inactivity time.
9
Avoided flu illness
1 people found this helpful
I recently started taking OptiZinc by Source Naturals and noticed remarkable improvements. This product contains zinc bound to L-methionine for better absorption. After trying various zinc supplements, OptiZinc proved to be the best, enhancing my skin's condition and overall well-being. I felt more energetic and supported my immune system with an extra dose of zinc during cold and flu season. The tablets are easy to swallow, and with one a day, I achieved great results. Importantly, it has no unpleasant aftertaste, and I highly recommend it for anyone wanting to boost their health and immunity.
9
Faster recovery
Good zinc is a necessary supplement, particularly during the flu and SARS season. I give it to my children and husband, and I find that recovery occurs much more quickly.
7.5
Excellent against flu
Good quality and well tolerated, especially when combined with vitamin C, Echinacea, and linseed oil capsules. It’s excellent against flu and colds.
7.5
Effective for flu
This product, with copper added, has been part of my routine for over two years. I typically take 2-3 tablets daily during cold or flu, and they help immensely. ^^
7.5
Helpful for infections
I bought this product due to its price. If you have an infection or the flu, it genuinely helps. Just be careful not to overdose. I also appreciate the easy-to-swallow small tablets, particularly when suffering from a sore throat.
9
Stomach-friendly supplement
2 people found this helpful
I had difficulties taking zinc due to stomach pain and reflux but found OptiZinc tolerable. It didn't irritate my stomach lining, allowing me to benefit from zinc’s vital role in white blood cell production, thus enhancing my defence against pathogens. Given the current rise in Covid cases, supplementing with zinc is essential for our health. I'm grateful for this product, and it motivates me to share my experiences further.
8
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.
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.
9
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.
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.
8
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.
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
- 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
- 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
- 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
- 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
- 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
