Growth hormone secretion peaks in the first few hours after you fall asleep, and growth hormone directly stimulates collagen production
However, it can be very drying and irritating for some skin types and may cause degradation of copper peptides if used together
Psychiatry J
Feeling tired and foggy isnt always just a sign you need more sleep
A major review in the International Journal of Molecular Sciences goes into depth on GHK Cus biological actions and why it has been used in skin and repair contexts, including discussions on collagen, glycosaminoglycans, and overall tissue regeneration signaling
Symptoms : liver disease, neurological (dystonia, ataxia, tremor), psychiatric (depression, psychosis), Kayser-Fleischer rings