The next Korean phenom to hit Sephora isn’t a Jell-O pressed serum or a 12-step layering routine. It’s Crushed Tonic, a collagen supplement. Its creator, Korean-American entrepreneur Sally Olivia Kim, was inspired by her family’s seafood-heavy meals. “The Korean diet incorporates collagen-rich foods, like squid, octopus, and jellyfish,” says Yoon Soo Cindy Bae, a Korean-American dermatologist in New York City who also grew up eating all three. Crushed Tonic’s marine-based collagen powder comes in three (blessedly unfishy) flavors—Turmeric, Matcha, and the slightly sweet Original—and can be mixed with water, smoothies, or tea. While collagen is most often associated with tighter, plumper skin, recent studies show that this marine-sourced variety may stimulate hair growth, too. “Hair and skin contain collagen, and preliminary research shows that ingesting it might provide a bioavailable…