Vincenzo Nobile; Francesco Tursi; Enza Cestone; Renaud Sergheraert; Joel Duperray. The Effects of the Oral Supplementation With a Natural Keratin Hydrolysate (Kera-Diet®) on Hair and Nails: Randomized, Placebo and Benchmark-Controlled Clinical Trial on Healthy Females. Sally Kiu-Huen Ng, MBBS, FRACS 2021, 4, 7-16.