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 ...

Vitamin B12 is an essential nutrient for our bodies. Here's how to be sure you're getting enough of it. Sean Jackson Sean Jackson is a creative copywriter living in Florida. He's had work ...

Dr. Soma Mandal, a board-certified internist at Summit Health in New Providence, New Jersey, says that getting a CBC test is ...