Conclusion: Foods rich in polyphenols and nitrate provide trivial benefits for endurance exercise performance, although these effects may be food dependent. Highly trained endurance athletes do not appear to benefit from consuming nitrate-rich foods but may benefit from polyphenol consumption. Further research into food sources, dosage and supplementation duration to optimise the ergogenic response to polyphenol consumption is warranted. Further studies should evaluate whether differential sex-based responses to nitrate and polyphenol consumption are attributable to physiological differences or sample siz
PubMed 34965876 ↗L-Citrulline
People mainly take L-Citrulline for libido, performance, heart & lipids. Based on 116 first-hand reports and 14 meta-analyses & systematic reviews in the medical literature. Ranked #24 of 1,974 overall.
Of reports that state an outcome, 79% are positive.
What L-Citrulline does, according to users
Of the people who reported each effect, the share who said it got better.
6 more with fewer than 3 reports
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: Supplementation of some but not all micronutrients may benefit cardiometabolic health. This study highlights the importance of micronutrient diversity and the balance of benefits and risks to promote and maintain cardiovascular health in diverse populations. (Antioxidant Supplementation in the Prevention and Treatment of Cardiovascular Diseases; CRD42022315165).
PubMed 36480969 ↗Conclusion: Nevertheless, several studies have reported that L-citrulline supplementation can enhance exercise performance and recovery. Given the positive effects observed from some investigations, future studies should continue to investigate the effects of both acute and chronic supplementation with L-citrulline and citrulline malate on markers of blood flow and exercise performance and should seek to elucidate the mechanism underlying such effects.
PubMed 31977835 ↗Conclusion: CIT supplementation appears to have no overall effect on body composition. However, exploratory findings indicated potential benefits at higher doses or shorter durations. Rigorous trials controlling for dietary intake and training variables are needed to clarify its long-term effects.
PubMed 41097202 ↗Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“Legion L-Citrulline - 8g 3 times per week, to reduce oxygen cost of energy during intense workouts”
“L-Citruline 10-15g”
“pure l-citruline, 6 g daily one hour before workout”
“l-citrulline and taurine are a great combo for that.. waking up with solid boners err day like im 18 again”
“Something I found that makes my meds work way better is Citrulline 2g + Arginine 2g twice daily.”
Top discussions (5)
- 40M. I biohacked my way from severe alcoholism, ed/pied, severe anxiety to washington monument sized boners every morning, and almost no anxiety. In less than 1.5 years. AMA. ↗
- Beetroot = the most underused legal performance enhancer in sports nutrition? ↗
- The only 2 supplements that work for libido & erections ↗
- Taurine, the Forgotten Amino Acid Essential for Heart Health and Mood ↗
- Male libido, load size, erection quality, orgasm quality, and refractory period ↗
Other options for libido
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate