e ffect of too much acetyl l-carnitine and acetyl-L-carnitine roles and neuroprotection in developing brain Carnitine: Genetic Variants Affecting Mitochondrial
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( 10.1093/humrep/dew284) [DOI] [PMC free article] [PubMed] [Google Scholar] Reuter SE, Evans AM.2012

Finally, a clinical study found that supplementation with micronutrients, including zinc and magnesium, together with vitamins C and E, with or without vitamins from the B group, for 4 months improved signs of diabetic neuropathy (Farvid 2011)

The only athletes who it might adversely impact are those who compete in certain weight categories, as creatine supplementation typically increases body mass

Long-chain acylcarnitines and cardiac excitation-contraction coupling: links to arrhythmias
Effect of Different Types of Fish on Rats Suffering From Diabetes

Faster Muscle Recovery: Studies show L-carnitine reduces muscle damage after intense workouts, meaning you feel less sore the next day and can train again sooner
