Atelocollagen

Atelocollagen is a pepsin-treated collagen used as a film-forming, moisturizing, and skin-conditioning agent, typically at low concentrations in topical products. It is generally well-tolerated and considered very gentle, but as a protein-derived material (often bovine/porcine/marine), it can rarely provoke irritation or allergy in highly reactive or atopic individuals, so it is not scored as completely inert. Safety Notes: In mass-market and prestige leave-on serums/creams, atelocollagen is frequently used at very low levels (around 0.01–0.1%) primarily for film-forming/conditioning and marketing claims, often supplied as dilute aqueous solutions that further reduce true active solids. Higher-strength consumer products (notably Japanese/K-beauty collagen essences, ampoules, and sheet-mask essences) are marketed with atelocollagen in the ~1–5% range where sensory and stability limits (viscosity, tack, odor, microbial control) typically constrain further increases; rinse-off cleansers generally sit at the low end due to limited deposition.