Vitamin D2 Supplements Have a Surprising Drawback. Here’s What to Take Instead

Winter is coming, which means it’s time to stock up on our vitamin D. But people who use supplements to get sufficient amounts of this essential nutrient will want to make sure they’re getting the right kind.

In research published last year in the journal Nutrition Reviews, scientists at the University of Surrey in the UK examined the literature on vitamin D supplementation. They found evidence that vitamin D2 supplements can decrease people’s levels of vitamin D3, the kind that…