Another key difference between the two forms of vitamin D is their source. “Vitamin D2 is usually produced by plants when exposed to sunlight,” Dr. Jiang says. Meanwhile, vitamin D3 is found in animal ...

A Harvard study found that vitamin D supplements may help slow biological aging by protecting telomeres, the protective caps ...

Fish has the highest amount of omega-3s, but nuts, seeds, and beans are good sources of omega-3 too. Learn which foods offer ...