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Description
5+6) and one for natural aging (Fig

Why has GHK-Cu not been approved by the FDA

American Urological Association

This is most likely not a physiological change due to aging per se , but a consequence of the elderly being more prone to gastric dysfunction, with variable degrees of gastric atrophy and achlorhydria interfering with the absorption of vitamin B 12 from foods (Carmel, 1997)
