The Claim
L-citrulline derived from watermelon is better tolerated than L-arginine supplements at doses up to 15 g/day, with no gastrointestinal side effects reported, due to its avoidance of hepatic metabolism and utilization of a distinct intestinal absorption pathway.
What the research says
Not yet evaluated
We are still looking at what the research says.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
L-citrulline from watermelon causes no gastrointestinal side effects at doses up to 15 grams per day, while L-arginine supplements do, because L-citrulline is absorbed differently in the intestines and does not pass through the liver first.
See the scientific wording
L-citrulline from watermelon is better tolerated than L-arginine supplements, with no gastrointestinal side effects reported at doses up to 15 g/day, due to its bypass of hepatic metabolism and distinct intestinal absorption pathway.
L-citrulline from watermelon is absorbed in the lower intestine without being broken down by the liver, travels directly to the kidneys, and gets turned into L-arginine there. This L-arginine then enters the bloodstream and is used by blood vessels to make nitric oxide, which relaxes them. Because L-citrulline avoids the liver and gut enzymes that break down L-arginine supplements, it does not trigger stomach upset even at high doses.
What the research says
1 studyWatermelon gives your body L-citrulline, which gets turned into a helpful molecule without passing through the liver like L-arginine supplements do — and because of that, it’s less likely to upset your stomach, even at higher amounts.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.