carnitine

For example, they found that generalists are more likely to be able to synthesize carnitine, a molecule that is involved in energy production and often sold as an exercise supplement.

By pairing caffeine with other buzzy active ingredients like ginseng, carnitine, creatine and ginkgo biloba, they position these drinks as enhancers of mental alertness and concentration, too.

And indeed, he had one: He was born without the ability to make an enzyme called carnitine palmitoyltransferase type 2.

Carnitine, chromium, anabolic steroids: Athletes have experimented with a broad array of aids in pursuit of performance edge.

Meldonium appears to work by inhibiting the synthesis of a substance called carnitine, which the cells in the body need to burn fat to produce energy.