That is a mechanistically attractive claim, and the pathway itself is unquestionably central to hair biology but the strength of the direct evidence tying GHK-Cu specifically to Wnt activation in human follicles is weaker than the confident phrasing online implies, and much of it is filtered through commercial rather than primary literature
References 1.Zunz E., La Barre J
Disruption of GPR35 signaling in bone marrow-derived cells does not influence vascular inflammation and atherosclerosis in hyperlipidemic mice
Vitamin B12 : Methylcobalamin included to support energy metabolism and nervous system wellness
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Other Ingredients : Microcrystalline Cellulose, DiCalcium Phosphate, Vegetable Magnesium Stearate, Natural Raspberry Flavor, Vegetable Stearic Acid