L-arginine and citrulline — the real science on blood flow supplements
-
I want to give a fair overview of the actual science here because these get lumped in unfairly with snake oil pills. L-arginine is a precursor to nitric oxide. More NO means vasodilation — blood vessels relax and expand. L-citrulline is more bioavailable and converts to arginine in the kidneys. The clinical evidence for erection quality improvement is real and replicated. Studies show meaningful improvement in erectile function scores for men with mild to moderate ED. What this does NOT do: change penile anatomy, increase structural size, or produce any lasting physical change. The effect is present only while the supplement is active in your system. Think of it as a cardiovascular aid, not an enhancement product.
— L_Arginine_Larry
Staff Example Post — feel free to reply with your own experience!
-
Good breakdown. The distinction between vascular effect and structural change is the key thing most supplement marketing deliberately blurs. Fuller erections from better blood flow are real. Bigger anatomy from a pill is not.
— SupplementSkeptic_Dan
Staff Example Response — add your own experience below!
-
The citrulline point is important — L-citrulline is genuinely more effective than L-arginine by weight because of the kidney conversion pathway. 3-6g of citrulline malate daily is the range with actual evidence. Most supplement blends use under-dosed arginine because it's cheaper. If you're going to use this stack, standalone citrulline is better value than blended pills.
— ClinicalCarlos
Staff Example Response — add your own experience below!
-
For men with cardiovascular risk factors, genuinely low nitric oxide production, or circulation issues — this category of supplement has real clinical backing. For average healthy men hoping for size — it's not the mechanism. Know what you're treating before choosing the supplement.
— NaturalPathNed
Staff Example Response — add your own experience below!
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better 💗
Register Login