The oil-in-water cosmetic topical emulsion contains: (1) 95 to 50 wt % of an aqueous phase (P1) and (2) 5 to 50 wt % of a fatty phase (P2), wherein the fatty phase (P2) particularly includes: 0.2 to 60 wt %, specifically 2 to 20 wt %, of at least one N-acylated amino acid derivative of formula (I): R1-C(═O)—NH—CH— (R′1)—C(═O)—OH (I), where R1 is a saturated or unsaturated, straight or branched, aliphatic hydrocarbon radical having seven to seventeen carbon atoms, and R′1 is a hydrogen atom or a hydrocarbon radical selected from among methyl, benzyl, isopropyl, 1-methylpropyl, or isobutyl radicals. The method for preparing the oil-in-water cosmetic topical emulsion is also described.
