As far as active ingredients go, niacinamide, a derivative of vitamin B3, is seen as more of a workhorse than a hero—but that may be changing. Sure, its popularity has been steadily increasing. In 2018, it was the third most popular antioxidant used in antiaging skin care from big beauty brands, according to a study in the International Journal of Cosmetic Science. But these stressful times—for our minds and, in turn, our skin—have catapulted niacinamide’s status even further thanks to its ability to moisturize, support the skin barrier, soothe, and help treat pigmentation, acne, and wrinkles “without causing irritation,” says Caroline Robinson, M.D., a dermatologist in Chicago. In other words, it can do the same heavy lifting that other actives do without the redness or dryness they might cause.…