l-carnitine and thyroid supplementation at doses of 2–4 g/day has been shown in a randomized, double-blind, placebo-controlled trial by Salvatore Benvenga to reverse prevent symptoms of iatrogenic hyperthyroidism in women receiving TSH-suppressive levothyroxine l carnitine effect on thyroid

Vitamin B12 is commonly used by people that are deficient (known through blood work) or that are not able to get sufficient from their daily diet (some vegetarians)

When you're trying that stuff, people are going up there with notepads and stuff like that

1, 2014, pubmed.ncbi.nlm.nih.gov/26770075

However, rigorous preclinical studies would use carefully calculated doses based on body weight and desired cellular concentrations

Researchers from the study on L-Carnitine and heart disease said, L-carnitine reduces hypertension, hyperlipidemia, diabetic ketoacidosis, hyperglycemia, insulin-dependent diabetes mellitus, insulin resistance, obesity, etc

40 , D261D270 (2012)