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J Sports Med Phys Fitness

L-Carnitine is the naturally occurring amino acid derivative essential for shuttling long-chain fatty acids into mitochondria for beta-oxidation and ATP production, as described in scientific literature ([ods.od.nih.gov]( The L-form is the only biologically active isomer D-carnitine is inactive and potentially inhibitory

These increases in decay and damage, and memory loss itself, can be partially reversed in old rats by feeding acetyl-L-carnitine

FMT is currently mainly used to treat inflammatory bowel disease, irritable bowel syndrome, constipation, metabolic syndrome, and other diseases

Although this supplement can be made by the body, you can also up your L-carnitine intake from your diet