levotiroksin l carnitine L-carnitine 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 PROTOCOL FOR LIFE BALANCE L-Carnitine
Description
Their usage depends entirely on your specific goals

Usar preferiblemente antes del ejercicio para maximizar sus beneficios

Coadministration of LC and TMX significantly improved the levels of TBARS and GSH (28 and 23%, respectively) in the brain compared to animals exposed to TMX alone

IMC, iodomethylcholine
Progression of atherosclerosis with carnitine supplementation: a randomized controlled trial in the metabolic syndrome
