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Swanson Vitamins

L-Ornithine, Free Form, 500 mg, 60 Veggie Capsules

4.8 · 907 reviews
980 ₽

Stress Support Dietary Supplement Supports a Healthy Stress Response Helps Eliminate Excess Nitrogen Arginine Precursor Science-Backed Quality Since 1969 Vegetarian The free-form amino acid L-ornithine is a key player in the urea cycle, which helps eliminate excess nitrogen and synthesize arginine, another important amino acid. Swanson L- Ornithine is a pure form of this vital amino acid, suitable for daily supplementation.

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Stress Support Dietary Supplement Supports a Healthy Stress Response Helps Eliminate Excess Nitrogen Arginine Precursor Science-Backed Quality Since 1969 Vegetarian The free-form amino acid L-ornithine is a key player in the urea cycle, which helps eliminate excess nitrogen and synthesize arginine, another important amino acid. Swanson L- Ornithine is a pure form of this vital amino acid, suitable for daily supplementation.

Customer reviews

5.0
verified purchase
Easing my parasite die off symptoms

Dying parasites release their toxins such as ammonia. Ornithine and arginine are two natural aminoacids that detox ammonia. It is important to take Ornithine and arginine together with the parasite cleanse. They help the body free itself from excessive nitrogen. Further they protect the liver from damage caused by medications and chemicals and stimulate the regeneration of the liver. They strengthen the immune defense by stimulating the production of more active and more effective WBCs. Start by taking ornithine, 2 at bedtime on the first night you get it. I took 3 nightly at second week of my cleansing regime. It is not habit forming. Without ornirhine I experienced very severe flu like symptoms at the first week of my parasite cleanse. Headaches nightly that interfered with sleep. With Ornithine I could sleep.

4/4/2024
5.0
verified purchase
Better than any sleeping pill

I struggled for years with insomnia and a “wired” brain, as my body was not detoxing ammonia. Added this in as part of digestive and parasite cleanse. It completely eliminated my herx and gives me the best sleep of my life with no more grogginess or 3am wake ups. This has been a miracle for me.

4/26/2025
5.0
verified purchase
Go-to

This is my go-to supplement to help keep ammonia levels down in my body. I suffer from a genetic disorder that causes high levels of ammonia to be stored in my body, & this keeps the levels down. Seems to help, so I keep ordering it. Also seems to be of good quality.

12/2/2023
5.0
verified purchase
Good for so many things

Ornithine can be used for sports performance, sleep, manage stress and so many other things. I use it mainly for liver health and protein metabolism, urea cycle detoxification of ammonia. I don't really "feel" the results, but I believe it's working... at least my blood work is perfect!

3/4/2026
5.0
verified purchase
Great

Good quality with the right ingredients to give a full spectrum and composition. High benefits

1/14/2026
5.0
verified purchase
Good amino acid

I have read about L-Ornithine helping to release ammonia from the body. The quality and the ingredients of this supplement is pretty good imo. The size of the capsule is average, there is no aftertaste. I hope to benefit from it for my sleep quality and brain function. It came packaged properly for transportation.

12/28/2025
5.0
verified purchase
Very helpful supplement

Very helpful supplement. I take L-Ornithine in the evening to support recovery and calm the nervous system. It noticeably improves sleep quality and reduces morning fatigue. It also helps with liver detox and ammonia removal after stress or heavy physical load. Easy to take, gentle on the stomach, and Swanson quality is always consistent.

11/29/2025
5.0
verified purchase

Effective L-Ornithine supplement! Swanson L-Ornithine has excellent quality with clean ingredients. The taste is mild, and the size and dosage make it easy to take daily. Its well-balanced composition fits perfectly into any diet or protein routine, supporting muscle recovery, boosting energy during training, and delivering noticeable overall benefits.

11/19/2025
5.0
verified purchase
Great supplement

I’ve been taking L-Ornithine before bed, and it really helps me sleep deeper and recover faster after workouts. I wake up feeling more energised and less tired. Great quality and easy to take, highly recommend!

11/7/2025
5.0
verified purchase
Чудово!

I take L-ornithine to support liver detox and improve sleep quality. I wake up feeling lighter and more refreshed. The formula is clean, with no unnecessary fillers. Also great for athletes to speed up recovery after workouts. Swanson never disappoints!

10/25/2025