Watermelon Powder
Also known as: Citrullus lanatus powder, watermelon extract, watermelon fruit powder
Effective Dosage
No established dose
What the Science Says
Watermelon powder is a concentrated, dried form of watermelon fruit, rich in the amino acid L-citrulline, lycopene, and antioxidants. Animal studies suggest it may help reduce inflammation, improve cholesterol levels, and support antioxidant defenses. It also contains L-citrulline, which the body converts to L-arginine and then to nitric oxide — a compound that supports blood vessel function and circulation. However, all available research comes from rat studies, so it is not yet known whether these effects translate to humans.
What It Doesn't Do
Not proven to lower cholesterol or blood pressure in humans — the only studies are in rats. Won't replace a balanced diet or treat cardiovascular disease. No clinical evidence it boosts athletic performance on its own. Not a proven cancer preventive in humans. Don't confuse animal study results with guaranteed human benefits.
Evidence-Based Benefits
In rat models, watermelon powder consumption was associated with reduced serum triglycerides, total cholesterol, LDL cholesterol, C-reactive protein, and oxidative stress markers, alongside increased antioxidant enzyme activity (PMID: 25631716). A separate rat study found that watermelon powder supplementation reduced precancerous colon lesions (aberrant crypt foci), elevated nitric oxide levels, and decreased DNA oxidative damage compared to controls (PMID: 30207495). These effects are attributed to bioactive compounds including l-citrulline, lycopene, and other antioxidants present in watermelon.
Weak EvidenceEffective at: No established dose (insufficient research data)
Source: auto-research
Absorption & Bioavailability
Unknown for the powder form in humans. L-citrulline from whole watermelon is known to be bioavailable, but absorption from concentrated powder has not been studied in human clinical trials.
Red Flags to Watch For
- Zero human clinical trials found — all evidence comes from rat studies, which often do not translate to human outcomes
- Over 1,000 supplement products contain this ingredient despite no established human effective dose
- Marketing claims about heart health and cancer prevention are not supported by human data
- Products vary widely in concentration and processing method, making dosing comparisons unreliable
Products Containing Watermelon Powder
See how Watermelon Powder is used in these analyzed products:
Research Sources
- General knowledge
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06