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One compound of research interest is the human peptide GHK (glycyl-L-histidyl-L-lysine), a copper-binding peptide known for its diverse biological actions that have been studied in the context of aging-related diseases and conditions
Decades of peer-reviewed research support nicotinamide for strengthening the barrier and refining tone, and glutathione for protecting against free radicals and uneven pigmentation
Metformin Metformin, a diabetes medication, activates AMPK, improving energy balance and mimicking caloric restriction
This article covers all of it: how GHK-Cu affects hair follicle biology, what the studies actually show, how topical and injectable forms compare, and how it fits into a serious multi-modal hair protocol
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