is l-carnitine effective L-Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage Carnitine: the claims and why
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doi: 10.1080/00365520802200036

The flux through pathways that require nonesterified CoA, such as the oxidation of glucose, may be reduced if all the CoA available in a given cell compartment is esterified

There is no threshold under which this substance is not prohibited

[66] [67] However, a 2025 meta-analytic systematic review of 113 randomized controlled trials found that stimulant medications were the only intervention with robust short-term efficacy, and were associated with lower all-cause treatment discontinuation rates than non-stimulant medications (e.g., atomoxetine)
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