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It has the unique ability to cross the blood-brain barrier, making it ideal for therapeutic applications

[DOI] [PMC free article] [PubMed] [Google Scholar] 103.Zeng L, Liu YP, Sha H, Chen H, Qi L, Smith JA

L-Carnitine injections can be particularly benecial for athletes and those who regularly engage in rigorous physical activities, as it helps improve endurance and reduce recovery time

GHK-Cu promotes the synthesis of both, making it one of the most effective ingredients for firming and tightening aging skin

Am J Physiol Gastrointest Liver Physiol 280:G1172G1177 Wyllie JC, Kaufman N (1982) An electron microscopic study of heme uptake by rat duodenum