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Unexpected, sensorial ingredients, exceptional sunscreens, and an abundance of disappearing sheet masks were just a few of the treasures I expected to unearth in my exploration of K-beauty regimens -- but I'll admit the vast world of ingestibles caught me by surprise. Specifically, the best Korean collagen supplements are proving to be the real secret to achieving bouncy, supple skin.

"Collagen is king!" Olive Kim, founder of two of Korean's favorite supplement brands Clöud Café & Collagelée, tells Vogue, emphasizing that while topical collagen is a staple, we'll be seeing the rise and innovation in ways to consume it (or inject it directly into the body). Remember, collagen is a structural protein rich in amino acids, found in abundance in the body. However, these levels decrease as we age -- making replenishing those reserves integral to maintaining a youthful appearance. And because collagen is a larger molecule, thought as generally too large to be absorbed into skin topically, most health experts recommend ingesting it. "Collagen supplements may help improve skin elasticity and hydration by supporting the body's natural collagen production," registered dietitian and host of women's health podcast, Flourish Heights Valerie Agyeman previously shared. She goes on to explain that collagen is by no means a quick fix, but it can help keep skin feeling and looking youthful.