As COVID-19 infections continue to rise, many have turned to supplements to boost immunity. Though eating a balanced diet high in nutrients (like vitamins) can support a healthy immune system, there are many false claims that exaggerate benefits of supplementation. Here’s a summary of the evidence for common supplements associated with COVID-19:
If you are interested in taking vitamin D, aim for 400-1000 IU (international unit) daily from a USP-verified supplement. Do not take more than 4000 IU a day, unless advised by a medical professional. Taking high doses can result in elevated levels of calcium in the blood, which can cause heart and kidney problems.
If you’re interested in vitamin C, add foods such as strawberries, peppers, oranges, and broccoli to your diet.
Pregnant women should avoid using these adaptogens. Ashwagandha may cause miscarriages and there is concern astragalus could be toxic for both moms and babies.
Important things you can do to support your immune system:
Also, don't forget to follow COVID-19 prevention protocols. Taking a supplement is nowhere near as important as wearing a mask and practicing social distancing.
REFERENCES (subscription necessary to view):
Don't Rely on Natural Products and "Immune Boosters" for COVID-19 Prevention. Natural Medicines Research Collaboration. Accessed December 2020.
What to Tell Patients About Vitamin D. Natural Medicines Research Collaboration. Accessed December 2020.
Why Ashwagandha & Adaptogens Are Growing in Popularity. Natural Medicines Research Collaboration. Accessed December 2020.
By Kylie Sakaida, MS, RD, LDN