De Felice FG, Gonalves RA, Ferreira ST
When volatile, destructive molecules known as reactive oxygen species (ROS) or "free radicals"such as hydroxyl radicals (HO) and peroxynitritethreaten to damage cellular DNA, lipids, or proteins, glutathione steps in
Hyattsville, MD: US Department of Health and Human Services, Centers for Disease Control and Prevention
In a pilot study in Thailand, Sangsuwan and Asawanonda tested the influence of daily intake of oral collagen (5 g) for 4 weeks on skin elasticity, especially in sun-exposed areas, in a randomized, double-blind, placebo-controlled trial (in a total of 36 women, aged 4060 years, where one-half of the participants were in the treatment group [ n = 18] or the placebo group [ n = 18]) [39]
However, these methods have clear limitations