can l carnitine causes elevated tsh pubmed L-Carnitine | Linus Pauling Institute Acetyl-l-Carnitine in the Treatment of
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Carnitor (levocarnitine) package insert

Fujihara KM, Zhang BZ, Jackson TD, Ogunkola MO, Nijagal B, Milne JV, et al

Enhancement of activities relative to fatty acid oxidation in the liver of rats depleted of L-carnitine by D-carnitine and a gamma- butyrobetaine hydroxylase inhibitor

This ensures a safe and effective treatment

They didnt rely on the supplement alone
