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Patient-facing language you can use Try this phrasing: "L-carnitine is usually safe but may affect your thyroid medicine or other drugs
doi:10.1146/ annurev.bi.57.070188.001401 [DOI] [PubMed] [Google Scholar] 41.Baci D, Bruno A, Bassani B, et al

As a result, CT2 may be a new candidate for regulating the doxorubicin influx and increasing intracellular doxorubicin accumulation

It's actually inactive on its own and works like a slow-release "storage" form
