Improves your athletic performance and also helps fight obesity
Ornithine
Updated Nov. 05th, 2024 | Read Time: 2 Minutes | What You Will Learn:
- Key Benefits of Ornithine
- Ornithine Supplement Varieties
- Cautions & Considerations
- Nutritional Information
- Reader Comments (2)
Ornithine is a non-essential amino acid because it is a component of protein that can be manufactured by the body from another amino acid, arginine. Just because it is non-essential does not mean that the body cannot benefit from its supplementation. Ornithine plays an important role in the metabolism of protein and nitrogen-containing compounds. Thus it has an important role in muscle building and regaining muscle after periods of illness or inactivity.
Key Benefits of Ornithine
Ornithine is involved in the production of polyamines (growth hormone) and other compounds that promote the growth of all body tissues including muscle. Ornithine can be used for wounds and other conditions that require repair of tissue. By stimulating growth hormones, ornithine promotes the metabolism of body fat. Thus ornithine has become a popular supplement for individuals who wish to lose weight. Ornithine enhances the activity of the thymus; the gland that produces T cells for the immune system.
Ornithine can be used for many health conditions in addition to the ones mentioned above. They include:
- High Cholesterol
- Liver Detoxification
- Aging and Skin Damage
Ornithine, arginine and carnitine are used by those who wish to increase their athletic performance.
Ornithine Supplement Varieties
The biologically active form of ornithine is L-ornithine. It is commonly found as a powder or in capsules. It is often combined with arginine and carnitine to increase the production of growth hormones and metabolizing fats. All amino acids are best taken on an empty stomach. If you take an individual amino acid supplement for longer than one month, take it with an amino acid complex to prevent the deficiency of other amino acids.
Cautions & Considerations
Pregnant or nursing women and children should not use ornithine. Do not use ornithine if you have schizophrenia.




As you mention, ornithine is connected to arginine. The bacteria that I study for my PhD is very dependent on arginine (while it can also use citruline)-arginine is it's primary energy source and resultantly, ornithine comes up sometimes. Its been a while though since I've thought about ornithine outside of bacterial metabolism. Thank you for reminding me of its role in the production of polyamines such as growth hormone and its role in producing other compounds which promote the growth and repair of body tissues. I didn't know that ornithine increases thymus activity and am now wondering if this is one reason why the bacteria I study induces a T cell immune response!
Hello Rachel,
Glad you enjoyed our article on Ornithine and happy to hear your insights and comments. You're welcome for the reminder and you can recap your knowledge on arginine here: https://www.nationalnutrition.ca/articles/supplements/arginine/
Have a healthy day!