Did you miss this article on John Meadows' www.mountaindogdiet.com ? Dancing with the Devil: L Carnitine (TLDR: L Carnitine might a actually be counteracting your fat loss by *blocking* thyroid action. More is not If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. Direct effects of thyroid hormones on hepatic lipid metabolism Nature Reviews Endocrinology Successive thyroid storms treated with L carnitine and low doses of Methimazole The American Journal of Medicine Karnitine ppt PPT Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications