Vincenzo Nobile (2021) “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”, Trichology and Cosmetology – Open Journal, 4(1), pp. 7–16. Available at: https://openventio.us/index.php/TC/article/view/219 (Accessed: 26 July 2026).