L-Arginine
A nitric-oxide precursor amino acid, historically used for pumps.
Educational only — not medical advice. BodEvo summarizes research cautiously and labels estimates as estimates. Talk to a physician or registered dietitian before starting any supplement, diet, or training program.
What the evidence says
Inefficient at raising nitric oxide orally; citrulline is preferred.
Typical dose & timing
Dose: Large doses needed; poorly absorbed.
Timing: Pre-workout.
Role in a stack
Outdated pump ingredient.
Redundancy check: Largely replaced by L-citrulline.
Cautions & safety
Poor oral bioavailability — citrulline is the better NO precursor. High doses cause GI upset.
GI upset at high doses. Educational only.
Best for
legacy pump products
Use it in the app: open the Supplement Library and Stack Builder — free, local-first, no account required.