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A practical way to think about concentration: For face and neck use, a 4% GHK-Cu concentration is often gentle enough for regular routines
Systemic side effects are not well-documented in human studies at therapeutic doses
however, it also has high rates of adverse side effects (25)
A total 2.5ml vial totals 500mg NAD+, and a 5ml vial totals 1,000mg NAD+ total
Melanotan I is photolabile, principally through oxidation of the tryptophan residue at position 9, so reconstitute away from direct sunlight and fluorescent lighting and transfer aliquots into amber or foil-wrapped vessels
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