l-carnitine is synthesized in the heart kidneys pancreas and liver biosynthesis. L-carnitine can be partly provided by an Carnitine-Acylcarnitine Translocase - an overview

doi:10.1186/1471-244X-4-25 Rybicka I, Krawczyk M, Stanisz E, Gliszczyska-wigo A

B Vitamins Can Reduce Body Weight Gain by Increasing Metabolism-related Enzyme Activities in Rats Fed on a High-Fat Diet Supplementation with B vitamins could effectively reduce BW gain and plasma levels of lipids by improving energy metabolism-related enzyme activities in rats, thus possibly providing potential benefits to humans

NRF2 expression remained constant over the 24-hour period, although appeared to move in and out of the nuclei every 4 hours

However, research suggests that high-dose oral B12 supplements work just as well as B12 shots for raising B12 levels in people with a deficiency

& Dong, Z

Complications of thyroid diseases 1