Optimal Glutathione or Optimal Glutathione Plus may be used by ages 4 and up and breastfeeding ladies
It also has a built-in safety ceiling
While GHK-Cu is not a growth hormone secretagogue, it exerts potent localised effects relevant to both hair and skin: Promotion of angiogenesis , increasing capillary density around follicles Stimulation of stem cell migration and differentiation Inhibition of transforming growth factor beta (TGF-) , a cytokine associated with follicular miniaturisation Enhancement of collagen and elastin synthesis , improving scalp elasticity and barrier function Topical GHK-Cu formulations, available through Dn Research in research-grade purity, can be incorporated into routine scalp applications to directly support the hair follicle microenvironment
You have gastrointestinal issues and cant absorb vitamins well
The animal science is solid, but no large human trials have been completed, it's not FDA-approved, and the company that developed it walked away from it in the early 2000s
Severely crepey necks with extensive elastin damage may not see dramatic changes