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(ref) Chang CH, Tsai WC, Hsu YH, Pang JH
Stimulation of Hair Follicle Cells Research shows that GHK-Cu activates dermal papilla cells, specialised cells at the base of hair follicles that control hair growth
They found that: (1) older HIV people had diminished glutathione synthesis because of cysteine and glycine deficiency in cells, but this deficiency could be rapidly corrected by supplementing N-acetylcysteine and glycine in the diet
Health Perspect.,2001 111
Therefore, if you have recently changed your diet, become vegan, and stopped consuming B12-rich foods, it may take several years for a deficiency to become apparent, and dietary supplementation might be an adequate solution over any need for B12 injections
