l-carnitine safe dosage 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 | Linus Pauling Institute

Widjajakusuma et al., 2019)

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But raising your levels isnt as simple as eating glutathione-rich foods or taking a supplement

The active (reduced) form is full of vigor and ready to do some heavy lifting