Does L-carnitine really help with weight loss? Is it effective without exercise?

L-carnitine is an amino acid-like substance that helps the body transport fatty acids into mitochondria for energy metabolism; it is not a potent fat-burning ingredient itself. It cannot directly burn fat, nor can it actively reduce weight without exercise. Only when combined with aerobic exercise and increased energy expenditure can it help improve fat utilization efficiency. For most people with normal diets, the body's own synthesis of L-carnitine is sufficient. Simply supplementing without exercise will not produce significant weight loss effects, and excessive intake may even cause gastrointestinal discomfort and other problems.

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