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But there is currently not enough evidence to support taking vitamin D solely to prevent or treat COVID-19.
1. Salmon
Whether the salmon is wild or farmed can make a big difference. Some studies have found even higher levels in wild salmon — up to 1,300 IU per serving That’s 124% and 32% of the DV, respectively.
Why You Need Vitamin D
National Institutes of Health Office of Dietary Supplements: “Vitamin D.”
New England Journal of Medicine: “How Much Sunlight Is Equivalent to Vitamin D Supplementation?”. U.S. Department of Agriculture: “Vitamin D in Mushrooms.”.
U.S. Department of Health and Human Services Office of Disease Prevention and Health Promotion: “Dietary Guidelines: 2015-.
Oily Fish
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Here’s our process. People can also consume vitamin D, but it is not naturally present in many foods. High quantities of vitamin D are present in oily fish and certain types of mushrooms.
It also contributes to a healthy immune system. It is present in egg yolks if the chickens laying them are free-range.