L-carnitine is a naturally occurring amino acid found mostly in meat and dairy products.
It can be produced by the body as long as you’re also eating enough of two other amino acids that it can’t produce, which are lysine and methionine.
L-carnitine serves several vital functions in the body, mostly related to the production of energy. Therefore, it’s not surprising that most of the L-carnitine in the body is found in the muscles, which have to be able to quickly generate a tremendous amount of energy for movement.
People supplement with L-carnitine to increase their body’s carnitine stores, especially the carnitine levels in their muscles which can produce a number of beneficial effects, including less muscle soreness and better post-workout recovery which is good for people who do regular weight training and exercise.