The "standard" protocol involves ingestion of either placebo (PL) or L-carnitine (LC) in the form of 2 g 60 min before testing
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Crane J, McGowan B
Diabetes 69 , 614623 (2020)
FDA Drug Safety Communication: FDA investigating reports of possible increased risk of pancreatitis and pre-cancerous findings of the pancreas from incretin mimetic drugs for type 2 diabetes , (2016)
Acetylcarnitine supplementation: pharmacodynamics, pharmacokinetics, and clinical efficacy in neuropsychiatric diseases Acetylcarnitine uptake from exogenous sources (e.g., food) The oral bioavailability of acetylcarnitine, similar to that of carnitine, is relatively low, with some studies reporting absorption rates as low as 510% of approximately 2000 mg, which is considered a saturating dose [107, 108]