A combination of oral fish collagen peptides and L-cystine may improve signs of skin aging in mature women and reduce skin imperfections in younger women, pointing to dual-market potential for the beauty-from-within category, according to new research. The trials evaluated a range of dermatological parameters, including skin ageing in women aged 55–65 and skin imperfections, such as moderate acne, in women aged 18–30. Mature skin study highlights hydration and wrinkle supportIn the trial focused on older participants, researchers assessed complexion radiance, crow’s feet, cutaneous thickness, moisturizing, pigmentation homogeneity, skin color and texture. The study used fish-derived collagen peptides and L-cystine obtained via hydrolysis of keratin from poultry feathers. Source: Cosmetics 2025, 12, 188. doi.org/10.3390/cosmetics12050188 “Effects of Oral Fish Collagen and l-Cystine on Skin Ageing in Mature Women and Skin Imperfections in Young Women: Findings from Two Randomised, Three-Arm, Double-Blind, Placebo-Controlled Studies.” Authors: Perin, F. et al.