Citrulline 2026: Blood Flow & Erections? Updated Dosage, Benefits, Risks & ResearchCitrulline 2026: Blood Flow & Erections? Updated Dosage, Benefits, Risks & Research
The Wellness Messiah Podcast
Rimon examines L-citrulline’s effects on blood flow, erections, exercise and ageing, using current research to weigh risks and benefits by age and timing. The conversation focuses on when citrulline may be helpful, when it may work against longevity goals, and how to use it cautiously alongside existing health routines.
15:59•4 Aug 2026
Citrulline And Blood Flow: Smart Use, Age Limits And Erection Talk
Episode Overview
- L-citrulline boosts arginine and nitric oxide, improving blood flow but may interfere with autophagy and longevity on fasting or low-calorie days.
- Under about 65, citrulline is framed as higher risk for long-term health and better reserved for occasional sexual performance support.
- Over about 65, lower IGF-1 and reduced circulation make citrulline a more reasonable option on days with food and exercise to aid muscle, bone and recovery.
- Blood flow and erection benefits have been seen at around 1.5 g/day, with practical dosing between 1.5 g and 5 g, often timed 60–90 minutes before activity.
- Caution is advised when combining citrulline with ED medication, nitrates or blood pressure drugs, and individual response should be tested carefully.
“L-citrulline is one of the best blood flow supplements I know as today, with possible natural erection capabilities.”
Ever wondered what it takes to use a supplement without sabotaging your long-term health? This episode of The Wellness Messiah Podcast zooms in on L-citrulline, a non-essential amino acid, and looks at its impact on blood flow, exercise performance and erections, with a strong focus on age and timing.
Rimon, a metabolic researcher with 19 years of supplement research behind him, sets out his key rule: supplements must be low risk and offer unique value without clashing with a healthy diet or exercise routine. He explains how L-citrulline turns into arginine in the kidneys, boosting nitric oxide and circulation, but also potentially feeding into pathways like mTOR and IGF-1.
That’s why he warns that “L-citrulline is one of the best blood flow supplements I know as today, with possible natural erection capabilities,” yet may be a poor choice on fasting or low-calorie "scarcity days" where autophagy and longevity benefits are the priority. You’ll hear a clear split between people under and over about 65. Under 65, Rimon sees mainly risk for longevity, suggesting dropping citrulline for day-to-day health and reserving it for occasional sexual performance support.
Over 65, however, lower IGF-1, reduced nitric oxide and weaker blood flow turn citrulline into a more promising option for muscle preservation, bone support, circulation and recovery on "refeed days" when you eat and exercise more.
Rimon breaks down study data, including a small trial where 50% of men moved from partially rigid to fully hard erections on 1.5 g/day, and talks through practical timing: around 60–90 minutes before exercise or sex, often on an empty stomach, and doses between 1.5 g and 5 g. He repeatedly stresses the limited research, the need to test individual response, and the importance of medical caution if you’re on ED drugs, nitrates or blood pressure treatment.
If you’re wondering whether citrulline fits your age, goals and training style, this episode gives you plenty to reflect on before popping the next capsule.
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