You may be familiar with hyaluronic acid in serum form—the buzzy humectant draws water into your skin and makes it noticeably more plump. However, your body contains natural stores of HA as well. “Hyaluronic acid is a naturally occurring type of sugar that is produced by the body and found in the highest concentrations in our skin, connective tissues, and eyes,” says board-certified dermatologist Jennifer Chwalek, M.D., about the ingredient. “It functions to retain water, keep our tissues well lubricated and our skin looking firm and youthful.” 

So in addition to slathering on a pillowy hyaluronic acid serum, you might want to think about ingesting the ingredient, too. In fact, oral forms of HA have been shown to support skin hydration and appearance: In fact, one study found that people who took 120 milligrams of hyaluronic acid a day for eight to 12 weeks experienced better skin aging (fewer wrinkles and more supple skin) compared with those who took a placebo.* 



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