l carnitine side effects fishy odor Did You Know? Some people report a “fishy” smell after supplementing with L-carnitine. This happens because certain gut bacteria convert to trimethylamine, a malodorous compound found in rotting fish. Can L-Carnitine Cause Side Effects?
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British Journal of Clinical Pharmacology, 65 (1), 51-59

You are a man because you have children: experiences, reproductive health knowledge and treatment-seeking behaviour among men suffering from couple infertility in South Africa

MI, myocardial infarction

If it appears and persists, one option is to reduce the dose or stop use and consult a healthcare professional, especially if it is being taken for a clinical reason