ghk-cu hair regrowth evidence studies Peptides Before and After: Dosage, Benefits & How It Works for Skin and GHK-Cu Peptide for Hair Growth:
Description
Medicines which can decrease the absorption of Vitamin B12 include: Colchicine (a medicine used to treat gout) Metformin (an anti-diabetic agent) Excessive Alcohol Vitamin C products

Several non-exclusive explanations are worth weighing, none of which requires assuming the rodent data were wrong

Effects of vitamin B12 on plasma melatonin rhythm in humans: Increased light sensitivity phase-advances the circadian clock

Research on AHK-Cu has focused on several areas of interest