Glutathione is composed of 3 peptides : glutamic acid, cysteine and glycine
A recent narrative review found that while it can be effective, results are inconsistent and often require ongoing maintenance (PMC narrative review)
Exploring structural mechanism of COVID-19 treatment with glutathione as a potential peptide inhibitor to the Main protease: molecular dynamics simulation and MM/PBSA free energy calculations study
Similarly if the food quality when eating does occur is low or deficient in nutrition, like many ultra-processed foods, then the organs can be starved of essential vitamins and minerals, effecting their health and function
GHK-Cu is photolabile as a copper(II) peptide complex, so keep both lyophilised vials and reconstituted solution protected from UV and fluorescent light, using amber or foil-wrapped vessels for aliquots
Studies have shown that those who eat a diet rich in nutrients and vitamins and low in processed food, and who are moderately physically active can increase lubrication and synovial fluid in the joints, which reduces the wear and tear on the cartilage (6)