Endocrinology 151 , 14731486 (2011)
Iron is vital for hemoglobin production and oxygen transport
A most recent study published in the Scandinavian Journal of Medicine & Science in Sports in 2018 found that increasing muscle carnitine during 24 weeks of HIIT (high-intensity interval training) did not enhance muscle metabolic adaptations or performance gains beyond those with HIIT alone
Wabitsch M, Blum WF, Muche R, Heinze E, Haug C, Mayer H, Teller W
Hormetic Response Mechanisms Hormesis describes the biological phenomenon where low doses of a stressor produce beneficial adaptive responses while higher doses become harmful
GHK-Cu may be scientifically interesting, but medical decisions should be based on diagnosis, evidence strength, safety, regulatory status, and comparison with better-studied options