l carnitine ncaa legal is banned by the NCAA banned substances L-Carnitine –
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Lin Z, et al

It helps transport fatty acids into the cells, where they are burned as fuel making it an ideal supplement for gym-goers, runners, cyclists, and athletes aiming for peak performance

The specific mechanism of the protein sparing effect of L-carnitine is detailed in Fig
16,326 In conditions of nutrient excess, as seen in T2DM, insulin resistance blunts insulin-mediated nutrient and energy responses, impairing nerve metabolism and bioenergetic failure