A new skincare habit popularized on TikTok is causing growing concern among dermatologists worldwide. Known as the “over-seruming” trend, it encourages users to layer multiple serums—sometimes five to seven products—in a single routine, promising instant glow, poreless skin and fast results. While the videos have gained millions of views, experts say this trend may do more harm than good. The obsession with serums is not new, but TikTok’s fast-paced beauty culture has amplified it to extremes. Videos often promote mixing actives like vitamin C, retinol, niacinamide, AHA/BHA acids and peptides in one routine without understanding how these ingredients interact. Dermatologists…