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Description
Now Foods L-Ornithine – L-ornithine 500 mg 120 vegetarian capsulesFood supplement L Ornithine 500 mg by NOW (L Ornithine) is an endogenous amino acid which, together with arginine and citrulline, plays an essential role in the urea cycle, freeing the body from ammonia a by product of protein metabolism. Because ornithine is converted into arginine, it may be helpful in maintaining the proper level of arginine in the body. Ornithine can also be converted into other amino acids, such as citrulline, proline, glutamic
Food supplement
L-Ornithine 500 mg by NOW® (L-Ornithine) is an endogenous amino acid which, together with arginine and citrulline, plays an essential role in the urea cycle, freeing the body from ammonia - a by-product of protein metabolism. Because ornithine is converted into arginine, it may be helpful in maintaining the proper level of arginine in the body. Ornithine can also be converted into other amino acids, such as citrulline, proline, glutamic acid, or into creatine, an important source of muscle energy.
To maintain the safety and satisfaction of its customers, NOW Foods uses pharmacopoeial quality raw materials and its suppliers are regularly audited.
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Ingredients (1 capsule)
L-ornithine (L-ornithine hydrochloride) 500 mg
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Ingredients: L-ornithine hydrochloride; capsule material – cellulose; filler – microcrystalline cellulose; subst. anti-caking: magnesium salts of fatty acids.
The production process did not use : wheat, gluten, soy, corn, milk, eggs, fish, crustaceans and tree nuts. Manufactured in a GMP facility that also processes other ingredients containing these allergens.
How to use: 1-3 capsules
Warning: Product intended for use by adults only. Pregnant and breastfeeding women and people taking medications or having medical conditions should consult a doctor.
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4.4 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
Puppy loves it!
Size: X-Large, Color: Teething Bone, Size: X-Large, Color: Teething Bone
My small puppy loves this bone! I originally purchased this for a larger dog, but my small 10 pound puppy loves it more. It’s good quality and a softer material for puppies!
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Reviewed in the United States on May 10, 2026
★★★★★ 4
A hit, but could be stronger
Size: Medium, Color: Ring Bone, Size: Medium, Color: Ring Bone
Gave this to my 11 week old pittie, and she did significant damage within 15 mins. She left a pile of chewed bits on the couch but thankfully didn't eat them. Definitely don't leave unsupervised.
That said, she LOVED it and it seemed to help her teething gums so, I'm still giving it a 4/5
Puppy pics for tax
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Reviewed in the United States on June 3, 2026
★★★★★ 5
FOR SHORT TIME USE
Size: X-Small, Color: Ring Bone
My puppies love this. After a couple of weeks, it is worn so I throw it out and buy another since it's reasonably priced. I don't want them to actually ingest a chunk of this.
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Reviewed in the United States on April 11, 2026
★★★★★ 5
Great for our puppy
Size: X-Small, Color: Ring Bone
This chew toy has quickly become our puppy’s absolute favorite. She’s just starting to teethe, and keeping her busy and comfortable has definitely been a challenge, but this ring has been a lifesaver. She was interested in it right away and keeps coming back to it on her own, which is a huge win. The chicken flavor seems to really hold her attention, and it gives her something appropriate to chew instead of everything else.
It’s the perfect size for a very young puppy and easy for her to hold and gnaw on without getting frustrated. It keeps her occupied, helps soothe her gums, and gives us a much-needed break during those teething moments. If you have a puppy just starting the teething phase and need something safe, durable, and engaging, this is an excellent choice and one I’d happily buy again.
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Reviewed in the United States on February 6, 2026
★★★★★ 5
Nylabone Ring Bone
Size: X-Small, Color: Ring Bone
My dog loves these. She chews them into pieces which helps keep her teeth clean. It is a mess to clean up. She chews and spits out the pieces. She is 6 years old so not a puppy.
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Reviewed in the United States on May 29, 2026