what are the side effects of l carnitine bright and the dark sides L-carnitine supplementation: a systematic review Potential Adverse Effects of L-Carnitine

At the molecular level, glutathione exists in two distinct states: a reduced, active form (GSH) and an oxidized, inactive form (GSSG)

A study (58) assessing the effects of resveratrol on metabolic parameters in ob/ob mice injected daily with resveratrol for 20 days or left untreated (as controls) showed that resveratrol: reduces testosterone reduces insulin levels reduced TNF- and IL-6 levels in adipose tissue In a rat model for PCOS (59), daily intraperitoneal injection of resveratrol for 4 weeks induced: a significant reduction in the number of antral follicle counts a significantly decreased plasma anti-Mullerian hormone and insulin-like growth factor 1 levels (playing a key role in PCOS metabolic disturbances) significantly lower superoxide dismutase activity significantly increased glutathione peroxidase which will reduce cell vulnerability to ROS

PubMed , HSS Journal , July 2025, p

However, many of these measurements are soft in that there is a lot more room for interpretation & error while rates of connective tissue synthesis are much more objective Additionally, collagen is probably the WORST protein for muscle protein synthesis with numerous studies showing no effect of collagen supplementation on muscle protein anabolism even at high doses of collagen (30g) (PMIDs: 37202878 & 38762187)

Peng et al., 2019