The Claim
A single 500 mL dose of L-citrulline-enriched watermelon juice containing 3.45 g L-citrulline significantly increases plasma L-arginine concentration immediately after a half-marathon in amateur male runners, with a 27% higher level compared to placebo.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Amateur male runners who drink 500 mL of L-citrulline-enriched watermelon juice containing 3.45 g L-citrulline after a half-marathon have 27% higher plasma L-arginine levels immediately afterward than those who drink a placebo.
See the scientific wording
A single 500 mL dose of L-citrulline-enriched watermelon juice (3.45 g L-citrulline) significantly increases plasma L-arginine concentration immediately after a half-marathon in amateur male runners, with a 27% higher level compared to placebo.
When a person drinks L-citrulline-enriched watermelon juice, the L-citrulline is absorbed from the gut into the bloodstream and carried to the liver, where it is converted into L-arginine. This raises the amount of L-arginine in the blood right after intense exercise.
What the research says
1 studyThe study found that runners who drank this special watermelon juice had 27% more L-arginine in their blood right after running a half-marathon than those who drank a plain drink — exactly what the claim says.
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.