Amino & PerformanceNo.050
L-Arginine
Nitric oxide, circulation, "pump" (marketed).
Typical / RDA3–6 g
Upper limitGenerally safe
EvidenceLimited
How to take it
Timing Pre-workoutFood Empty-ishForm L-arginine / citrulline
What to know
A nitric-oxide precursor for blood flow. Oddly, L-citrulline often raises arginine levels more reliably. Evidence for performance gains is modest.
Interactions & cautions
- May lower blood pressure; caution with BP meds and before surgery.
Do you actually need it?
Citrulline may outperform it; effects are modest either way.
Questions people ask about l-arginine
- Can You Take Too Much L Arginine? Side Effects and Daily LimitsWhile L-Arginine is generally safe, doses above 3–6 grams can cause side effects like GI upset and low blood pressure. Understand limits and interactions.
- Does L-arginine Really Help with Blood Flow and Circulation?L-arginine is a precursor to nitric oxide, which helps dilate blood vessels. Evidence for direct circulation benefits in healthy individuals is limited.
Reference values: NIH Office of Dietary Supplements, adult general population. Educational information only — not medical advice. Confirm with a healthcare professional.