Quick answer: nitric oxide (NO) comes from cells lining your blood vessels, and its function is to relax and widen those vessels — vasodilation — keeping blood moving efficiently. Because specific amino acids feed directly into nitric oxide production, they show up constantly in supplements aimed at circulatory support.
How Does the Body Produce Nitric Oxide?
The body converts the amino acid L-arginine into nitric oxide through an enzyme process. L-citrulline, another amino acid, is converted into L-arginine in the kidneys, effectively serving as an additional pathway to support nitric oxide production. This is why supplement formulas often include both L-arginine and L-citrulline (or related compounds like L-Citrulline Malate and L-Arginine AKG) — they work through complementary pathways toward the same end goal.
Research on L-citrulline has found that, in some studies, it raises blood arginine levels more effectively than taking arginine directly, since a portion of ingested arginine is broken down in the gut before it can be used.
What Has Nitric Oxide Been Studied For?
| Area of Study | What Nitric Oxide's Role Is Thought to Be |
|---|---|
| Cardiovascular health | Supports healthy blood pressure by helping blood vessels relax appropriately |
| Exercise performance | Studied for its role in blood flow to working muscles during physical activity |
| General circulation | Supports blood flow delivery of oxygen and nutrients throughout the body, including to the brain |
| Vascular aging | Nitric oxide production is known to decline with age, an active area of cardiovascular research |
What Is Beta Alanine's Role?
Beta alanine is an amino acid the body uses to produce carnosine, a compound studied primarily for buffering acid buildup in muscle tissue during exercise. It's included in some wellness formulas alongside circulatory-support ingredients as part of a broader daily nutritional profile, though its research base is more specific to exercise physiology than to circulation directly.
Is Nitric Oxide Support the Same as a Stimulant?
No — this is a common point of confusion. Nitric oxide precursors like L-arginine and L-citrulline work through vascular signaling pathways, not through central nervous system stimulation the way caffeine or other stimulants do. This is why formulas built around these ingredients are often marketed as non-stimulant, since they don't rely on the same mechanism as stimulant-based products.
Sources
- National Institutes of Health, Office of Dietary Supplements, general information on L-arginine and L-citrulline.
- American Heart Association, general information on nitric oxide and vascular health.
- Published research on L-citrulline and plasma arginine levels, general scientific literature.
This article summarizes general nutritional science for educational purposes. It is not medical advice and does not claim that any specific product, including Memovance PRO, produces these effects. Consult a healthcare provider regarding your individual health needs.