L-Ornithine Research Reference

Catalog classification, reference sizes, lab math links, and source-backed data. Educational use only — not medical advice.

Researched for: L-Ornithine evidence and protocol review

Amino Acids & Nutrients amino-acid PowderCapsule verified

Also known as: Ornithine

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Quick Facts

Reference Sizes

10 g, 100 g

Storage

No approved consumer storage standard exists for this presentation; follow the lot-specific COA and validated stability data

Solubility

Freely water-soluble as HCl salt

Catalog Description

L-ornithine is a non-proteinogenic amino acid and key intermediate of the urea cycle, supporting ammonia detoxification. It is studied in combination with arginine for exercise recovery and has been investigated for sleep quality and (alongside GH secretagogues) growth-hormone-axis research contexts.

Catalog descriptions reflect research context only. Not a medical claim or treatment recommendation.

Research Profile

Half-Life

Not well characterized as a standalone human PK value

Onset

Acute dosing studied for sleep/recovery outcomes

Administration Routes (Research)

Oral

Reported Research Effects

Urea-cycle intermediate - supports ammonia clearance
Studied for exercise recovery and sleep quality

Reported Research Side Effects

Human safety, pharmacokinetics, and interaction data are incomplete

Data source: Primary literature, regulator records, trial registries, and identity-specific evidence search

Reflects preclinical/research literature context only. Not a medical claim, dosing instruction, or treatment recommendation.

Research Protocols Reported in the Literature

400 mg/day [Oral; 8 weeks; Daily]Source: small randomized worker stress/sleep trial
1.6 g/day [Oral; 7 days; Daily]Source: randomized social-stress trial

Research Notes

The catalog's 2-12 g growth-hormone claim was not supported as a clinical protocol. The cited stress trials were small and sponsor-linked.

Supplementary research context only. Not medical advice or a treatment recommendation.

Sources

L-ornithine stress and sleep randomized trial — PubMed (NIH)
https://pubmed.ncbi.nlm.nih.gov/24889392/

L-ornithine social-stress randomized trial — PubMed (NIH)
https://pubmed.ncbi.nlm.nih.gov/39768508/

Ornithine graded-dose tolerance study — PubMed (NIH)
https://pubmed.ncbi.nlm.nih.gov/36571619/

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Research Use Only. All content is for educational and research reference only. Not medical advice, a treatment recommendation, or guidance on human use. Compounds are not FDA-approved drugs unless specifically noted.