Sleep support evidence brief
L-ornithine is an amino acid involved in the urea cycle. Supplements are commonly used for fatigue, ammonia clearance, sleep quality, and recovery claims.
Small trials suggest fatigue, stress, or sleep effects, but evidence is not strong enough for broad fatigue-management claims.
Small RCTs report fatigue or stress/sleep signals; ammonia-clearing claims need stronger replication.
Human studies use different hydrochloride or free-form protocols; stress/sleep findings do not automatically generalize to other outcomes.
Ammonia-clearing endurance claims need stronger performance data before being treated as a separate use case.
Source Drawer
The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.
Send the disputed claim, source link, and why it changes the practical verdict. Corrections that materially affect the claim, dose, caveat, or rating are prioritized.
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