is l carnitine safe before a workout L-Carnitine or After – Which Better for Fat Loss ? When to take L-carnitine: Dosage,
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doi: 10.1515/jpem-2020-0642

For males with abnormal sperm parameters, a combination of L-carnitine and vitamin C is often recommended as part of a fertility enhancement protocol 3

Urban & Fischer Verlag, Mnchen 2008 Plioplys, AV

L-carnitine also enhances energy metabolism by increasing carbohydrate utilization and reducing protein breakdown [21]

[DOI] [PubMed] [Google Scholar] Bohan TP, Helton E, McDonald I, Konig S, Gazitt S, Sugimoto T, Scheffner D, Cusmano L, Li S, Koch G

Thyroid medicines such as levothyroxine: Zinc supplements may interfere with their absorption when taken simultaneously, thereby reducing their effectiveness
