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The same 2g administered intravenously or via intramuscular/subcutaneous injection delivers close to 100% systemically At 500mg/ml, a single 2ml injection of Dragon Pharma L-Carnitine delivers 1,000mg with near-complete bioavailability equivalent to approximately 5,500-7,000mg of oral L-Carnitine supplement in terms of what reaches the bloodstream This bioavailability advantage is particularly relevant for the androgen receptor upregulation application (below), where plasma L-Carnitine concentrations not gut absorption determine the effect How L-Carnitine Works The CPT Shuttle Mechanism L-Carnitine's primary metabolic function is a specific and elegant transport mechanism that most competitor content reduces to "moves fat to mitochondria": Long-chain fatty acids (the primary fat fuel for aerobic metabolism) cannot cross the inner mitochondrial membrane directly they require a specific transport system L-Carnitine acts as the shuttle carrier in the carnitine palmitoyltransferase (CPT) system : CPT1 on the outer mitochondrial membrane conjugates L-Carnitine to the fatty acid (forming acylcarnitine)
References Abrignani MG, Luc F, Abrignani V, Pelaggi G, Aiello A, Colivicchi F, Fattirolli F, Gulizia MM, Nardi F, Pino PG, Parrini I, Rao CM (2024) A look at primary and secondary prevention in the elderly: the two sides of the same coin
The requirement of two distinct glutathione interaction sites for the efficient reduction of GSSR by GSH explains the deviating properties and substrate preferences of glutaredoxin subfamilies as well as thioredoxins with implications for the design and optimization of artificial enzymes and inhibitors
Its molecular structure is distinct, enabling it to stay active in the body for a longer duration than the naturally occurring GHRH
P., Limjunyawong, N., Gour, N., Pundir, P., & Dong, X
