heptanoyl-l-carnitine NOW Foods Supplements, Acetyl-L-Carnitine 750 mg, Amino Acid, Brain And Nerve Cell Function*, 90 Tablets : Health & Household The liquid format is praised for its potency and ease of swallowing Heptanoyl-L-carnitine (chloride) (C7:0 Carnitine, CAR

Rev Endocr Metab Disord 14:387407

Carnitine, Acylcarnitines and Fatty Acid Transport into Mitochondria The substrates for oxidation and most of the energy production in cells are unesterified fatty acids, which originate from three main sources: exogenous fatty acids that enter cells from the circulation, either from the diet or by mobilization from other tissues, those that arise via synthesis de novo from acetyl-CoA, and those released within the cell by the hydrolysis of phospholipids and triacylglycerols

This mechanism means L-Carnitine is most effective when you are actually exercising, specifically during steady-state or moderate-intensity cardiovascular training where fat is the primary fuel source

However, it is not considered an essential nutrient because the body can make it from the amino acids lysine and methionine