is l-carnitine good for hypothyroidism supplementation at doses of 2–4 g/day has been shown in a randomized, double-blind, placebo-controlled trial by Salvatore Benvenga to reverse and prevent symptoms of iatrogenic hyperthyroidism in women receiving TSH-suppressive levothyroxine L-Carnitine : Boost Weight Loss,
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Simmons P, Chang-Lin J, Chung Q, Vehige J, Welty D: Effect of compatible solutes on transepithelial electrical resistance and uptake in primary rabbit corneal epithelial cell layers model

Mondal, S., et al

& Rich, P.A
According to the NIH, several drugs have the potential to interact with L-carnitine
