Overview

Ornithine is a chemical called an amino acid. It is made in the body. It can also be made in a laboratory. People use it as a medicine.

Ornithine is commonly used by mouth for improving athletic performance. It is also used for weight loss, wound healing, and to increase sleep quality. But there is limited scientific research to support these other uses.

Don't confuse ornithine with ornithine alpha-ketoglutarate (OKG) or L-Ornithine-L-Aspartate.

How does it work ?

It's not known how ornithine might work for medical uses. However, ornithine might help to increase levels of the amino acid, arginine. It might also increase levels of hormones that increase muscle size.

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