l carnitine make me smell like fish Did You Know? Some people report a “fishy” after supplementing with L-carnitine. This happens because certain gut bacteria convert to trimethylamine, a malodorous compound found in rotting fish. How Do You Stop Fishy
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As LC has been reported to act as a potent antioxidant with very less side-effects, researchers are now considering its implementation as a treatment for female infertility [5, 11, 12]

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Hatazawa et al., 1988

The symptoms of lysine deficiency include decreased appetite, weight loss in adults, growth delay in children, anemia, fatigue, and mood changes, such as irritability and agitation
Please see table 4 below