Chlorhydrate d’Ornithine, L-Ornithine, L-Ornithine HCl, L-Ornithine Hydrochloride, L-5-aminorvaline, L-2,5-diaminovaleric acid, Ornithine HCl, Ornitina.<br/><br/>


Overview Information

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 used for improving athletic performance, reducing glutamine poisoning in the treatment of a brain condition due to liver disease (hepatic encephalopathy), and for wound healing.

Don’t confuse ornithine with ornithine alpha-ketoglutarate (OKG).

How does it work?

It's not known how ornithine might work for medical uses.


Uses & Effectiveness?

Possibly Effective for

  • Brain complications caused by liver disease (hepatic encephalopathy). Most research suggests that infusing L-ornithine-L-aspartate intravenously (by IV) or taking L-ornithine-L-aspartate by mouth improves ammonia levels and disease status in people with hepatic encephalopathy.

Insufficient Evidence for

  • Athletic performance. Early research suggests that taking ornithine by mouth might reduce fatigue and improve measures of athletic performance such as speed, strength, and power in some people. Also, taking ornithine in combination with arginine seems to improve strength and power in male weightlifters.
  • Wound healing.
  • Other conditions.
More evidence is needed to rate the effectiveness of ornithine for these uses.

Side Effects

Side Effects & Safety

There isn't enough reliable information about the safety of ornithine.

Special Precautions & Warnings:

Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking ornithine if you are pregnant or breast-feeding. Stay on the safe side and avoid use.



We currently have no information for ORNITHINE Interactions.



The appropriate dose of ornithine depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for ornithine. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

View References


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  • Manufacturer: Twinlab. Ronkonkoma, NY.
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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

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