l carnitine forumas L-Carnitine is Underrated. New Meta Review Reminds Us Why - Supplements but you also get some from food L-Carnitine
Description
MULTIPLE BENEFITS: Acetyl L-Carnitine is made naturally in from L-Carnitine in the liver and kidneys and functions as an antioxidant and supports the production of glutathione

The effect of acylcarnitine on insulin sensitivity is also related to the saturation of acylcarnitine, with myotubes incubated with C16-carnitine exhibiting reduced insulin sensitization, whereas the accumulation of oleoylcarnitine (C18:1-carnitine) and linoleoylcarnitine (C18:2-carnitine) increases insulin sensitization [77]

Cell Microbiol

In addition, given the impact of central regulation of TH on orexigenic neuropeptides (78), variable regulation of the HPT axis with altered leptin levels also could be responsible for this metabolic abnormality (20)

Room temperature (1-30C), sealed container
