What the Evidence Says About Collagen and Breakouts No direct, proven link: Reviews and expert guidance do not show collagen peptides causing acne in healthy users
The data suggests that several major pathways including (1) energy metabolism, (2) protein degradation, (3) fatty acid metabolism and (4) antioxidant system are altered in livers from ibuprofen treated mice
^ Deficient synthesis of glutathione underlies oxidative stress in aging and can be corrected by dietary cysteine and glycine supplementation
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doi:10.1054/ghir.1999.9998 Greenwood-Van Meerveld B, Tyler K, Mohammadi E, Pietra C
In addition, GSTs are also involved in conferring multidrug resistance with a non-catalytic mechanism through their inhibition of the JNK signaling pathway, an event that protects tumoral cells from apoptosis, as it will be detailed later