Vitamin C & Zinc Benefits: Doctor’s Denial – Al-Consulto
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Doctor Challenges claims of Vitamin C and Zinc Benefits for COVID-19
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A medical professional is questioning the widely held belief that high doses of vitamin C and zinc can prevent or treat COVID-19,despite ongoing public interest in these supplements.
The Controversy: Vitamin C, zinc, and COVID-19
Dr. Michael Daignault, a board-certified emergency medicine physician, has publicly refuted the notion that vitamin C and zinc are effective against COVID-19. His statements, reported by Consulto (a Brazilian health news outlet), challenge popular claims circulating online and among some segments of the public.
The debate centers around the idea that these nutrients bolster the immune system, potentially reducing the severity or duration of COVID-19 infections. Though,dr. Daignault argues that scientific evidence does not support these claims.
What Does the Science Say?
While vitamin C and zinc are essential for immune function, studies investigating their impact on COVID-19 have yielded mixed results. A meta-analysis published in the British Medical Journal in 2021 found no evidence that vitamin C reduces the risk of pneumonia or death in sepsis patients, a condition often associated with severe COVID-19. Similarly, a review in the Cochrane Database of Systematic Reviews (updated November 2022) concluded that zinc supplementation did not substantially reduce the duration or severity of the common cold, and its effect on COVID-19 remains unclear.
Dr. Daignault emphasizes that relying on unproven remedies can be detrimental, potentially delaying individuals from seeking appropriate medical care. He points out that the best defense against COVID-19 remains vaccination and adherence to public health guidelines.
Why the persistent Belief?
The belief in vitamin C and zinc as COVID-19 remedies likely stems from several factors. Vitamin C has long been touted as an immune booster,and zinc is known to play a role in immune cell advancement. During the early stages of the pandemic,when limited treatment options were available,many individuals turned to supplements as a perceived form of self-protection. Misinformation spread rapidly through social media, further amplifying these beliefs.
Furthermore, the concept of “nutrient therapy” resonates with some who prefer natural or option approaches to healthcare. However, experts caution against equating anecdotal evidence with rigorous scientific proof.
Recommended Daily Intake vs. “Therapeutic” Doses
It’s important to distinguish between recommended daily allowances (RDAs) and the much higher doses sometimes promoted as “therapeutic” for COVID-19. Excessive intake of vitamin C and zinc can have adverse effects.
| Nutrient | Recommended Daily Allowance (RDA) – Adults | Upper Tolerable Intake Level (UL) – Adults |
|---|---|---|
| vitamin C | 90 mg (men), 75 mg (women) | 2000 mg |
| Zinc | 11 mg (men), 8 mg (women) | 40 mg |
Data sourced from the National Institutes of Health Office of Dietary Supplements. Exceeding the UL can lead to side effects like nausea, diarrhea, and abdominal cramps.