Now that we are heading into winter in the northern hemisphere, many of us may experience lower vitamin D levels as the sun is no longer capable of helping us produce it. A promising study showed that using a form of vitamin D called calcidiol reduced the risk of ICU admission by 93% compared to the group that took no calcidiol in Covid-19 patients. But some people don’t respond to supplementation when their levels are already low. I will tell you how you can improve your production of active vitamin D, whether you should supplement, and how a commonly available supplement can really help.
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