Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study. E Proksch 1, D Segger, J Degwert, M Schunck, V Zague, S Oesser
https://onlinelibrary.wiley.com/doi/full/10.1111/jocd.12174
Ingestion of hyaluronans (molecular weights 800 k and 300 k) improves dry skin conditions: a randomized, double blind, controlled study. Chinatsu Kawada, Takushi Yoshida, Hideto Yoshida, Wakako Sakamoto, Wataru Odanaka, Toshihide Sato, Takeshi Yamasaki, Tomoyuki Kanemitsu, Yasunobu Masuda, Osamu Urushibata
Cosmetic benefits of astaxanthin on humans subjects* Kumi Tominaga, Nobuko Hongo, Mariko Karato and Eiji Yamashita
Green Tea Linked To Skin Cell Rejuvenation. April 25, 2003. Source: Medical College Of Georgia. https://www.sciencedaily.com/releases/2003/04/030425071800.htm
Ramírez-Bosca A, Zapater P, Betlloch I, et al. Polypodium leucotomos extract in dermatitis: a randomized, double-blind, placebo-controlled, multicenter trial. Actas Dermosifiliogr. 2012;103(7):599–607.
Polypodium leucotomos as an Adjunct Treatment of Pigmentary Disorders. Mark Nestor, MD, PhD,corresponding authora Vivian Bucay, MD,b Valerie Callender, MD,c Joel L. Cohen, MD,d Neil Sadick, MD,e and Heidi Waldorf, MD
Capote R, Alonso-Lebrero JL, García F, Brieva A, Pivel JP, González S. Polypodium leucotomos extract inhibits trans-urocanic acid photoisomerization and photodecomposition. J Photochem Photobiol B. 2006;82(3):173–179.
Caccialanza M, Percivalle S, Piccinno R, Brambilla R. Photoprotective activity of oral polypodium leucotomos extract in 25 patients with idiopathic photodermatoses. Photodermatol Photoimmunol Photomed. 2007;23(1):46–47.
Afaq F, Adhami VM, Ahmad N, « Prevention of short-term ultraviolet B radiation-mediated damages by resveratrol in SKH-1 hairless mice ». Toxicol Appl Pharmacol 2003; 186: 28–37.
Aziz MH, Afaq F, Ahmad N, « Prevention of ultraviolet-B radiation damage by resveratrol in mouse skin is mediated via modulation in survivin ». Photochem Photobiol 2005; 81: 25–31.
Reagan-Shaw S, Afaq F, Aziz MH et al, « Modulations of critical cell cycle regulatory events during chemoprevention of ultraviolet B-mediated responses by resveratrol in SKH-1 hairless mouse skin ». Oncogene 2004; 23: 5151–5160.
12
Liu Y, Chan F, Sun H, Ya J, Fa D, Zhao D, An J, Zhou D, « Resveratrol protects human keratinocytes HaCaT cells from UVA-induced oxidative stress damage by downregulating Keap1 expression ». Eur J Pharmacol. 2011;650:130–7
Wu Y, Jia LL, Zheng YN, Xu XG, Luo YJ, Wang B, et al, « Resveratrate protects human skin from damage due to repetitive ultraviolet irradiation ». Journal of the European Academy of Dermatology and Venereology JEADV 2012 ; Jan 5
Watson, Ronald Ross; Zibadi, Sherma (Eds.), « Bioactive Dietary Factors and Plant Extracts in Dermatology » (2013) pp 177-187 - https://link.springer.com/book/10.1007/978-1-62703-167-7/page/1