What are the side effects of taking L-carnitine?

Dec 19, 2021 Source: Cainiu Health
Disease description:

I’ve gained a lot of weight recently. I heard that taking L-carnitine can help with weight loss—what are the potential side effects of taking L-carnitine?

Doctor's answer (1)
Dr. Deng Tao
Taking L-carnitine may cause certain side effects—for example, prolonged use of the supplement may lead to diarrhea and gastrointestinal dysfunction. As food intake decreases following L-carnitine supplementation, some individuals may experience fatigue, malnutrition, and reduced sleep quality; in severe cases, kidney and liver function may be impaired.