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 STERIS PHARMA | Levo Carnitine,
Description
[DOI] [PubMed] [Google Scholar] 19.Mitochondrial ROS-induced ROS release: an update and review

IMC, iodomethylcholine
It is also approved kosher and contains no major allergens

PubMed Central PMCID: PMC6356007

(1 cucharada): L-Carnitina (forma libre): 1500 mg

Their usage depends entirely on your specific goals
