l carnitine or lycine vitamins L-Carnitine Amino Acid - 3,000 MG - Supports Energy Production & Fat Metabolism This Swanson product is formulated with science and crafted with care L-Carnitine 250 mg. - Windmill
Description
Additionally, WADAs approach to this matter lacks consistency

Try taking 1500-2000 mg daily, divided into two doses (one in the morning and one before exercise)

Pittler, M

1 2 Annual Review of Biochemistry

Helps the body convert stored fat into usable energy