Fitness influencers and podcasters took the Vitamin D story and ran with it to extremes. The number of people who think more is better with vitamin D or assume that their levels are severely low without checking is scary.

Taking a nominal amount of Vitamin D is probably a good idea for those of us who spend a lot of time indoors. Taking 10s of thousands of IUs every day for years is probably a bad idea for anyone who isn’t regularly checking their Vitamin D levels.