doi: 10.3390/mi15111348 217 BergerEMagliaroCPacziaNMonzelASAntonyPLinsterCLet al
GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) is a naturally occurring tripeptide found in human plasma, saliva, and urine
It has been extensively studied for its various biological functions, including antioxidant properties (Seo et al., 2014), anti-obesity and anti-diabetic effects (Zang et al., 2015), prevention of cardiovascular diseases and some types of cancer (Robb and Stuart, 2014), prevention of bone diseases (Zhang et al., 2016), alleviation of acute lung injury (Seo et al., 2017)
However, meditation alone was most likely responsible for this effect since it reduced stress and improved well-being in a meta-analysis of 47 studies [46+, 47]
NAC takes a different approach
Substance P: A pioneer amongst neuropeptides