4. Vitamin A
As you probably know, vitamin A is the generic term for a group of fat-soluble compounds that are highly important for our overall health. Even though vitamin A is essential for immune health and vision, most Americans are not deficient in it and should not be supplementing with it, says Arielle Levitan, MD, co-founder of Vous Vitamin, and co-author of The Vitamin Solution: Two Doctors Clear the Confusion About Vitamins and Your Health.
“It is readily available in many food sources, including fruits and vegetables, and many foods are fortified with it,” she says. “It is a fat-soluble vitamin, so even if you don’t take in too much, what you do consume stays in your fat cells for a long time.”