Taking L-citrulline supplements every day for a few weeks might slightly lower your blood pressure—like a small drop that could help keep your heart healthier.
Claim Language
Language Strength
probability
Uses probability language (may, likely, can)
The claim uses 'suggesting a potential role'—phrases that indicate possibility or likelihood rather than certainty, placing it in the probability category. The verb 'reduces' is direct but is tempered by 'modestly' and 'suggesting a potential role,' which soften the assertion.
Context Details
Domain
nutrition
Population
human
Subject
L-citrulline supplementation at doses of 3–9 g/day for 1–17 weeks
Action
reduces
Target
systolic blood pressure by an average of 4.1 mmHg in healthy adults aged 22–71 years
Intervention Details
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Evidence from Studies
Supporting (1)
l-Citrulline supplementation improves O2 uptake kinetics and high-intensity exercise performance in humans.
This study gave healthy men 6 grams of L-citrulline daily for a week and found their blood pressure went down a little, which matches what the claim says L-citrulline can do.