L-Arginine
Full ranking Dose tool Products (717)
Key facts
Daily Value (US FDA)—
Tolerable Upper Intake Level (UL)— Reference upper value (cited, not a UL): 8,000 mg
Median (Per day)625 mgP5 25 – P95 3,000
Products717
Sources: https://webprod.hc-sc.gc.ca/nhpid-bdipsn/atReq?atid=arginine.l2&lang=eng · Health Canada NNHPD monograph: 0.21-21 g L-arginine/day; not to exceed 8 g per single dose
Daily dose across products (mg/day)
Reference upper value (cited, not a UL) 8,000
2.5 mglog scale · n=7176,000 mg
Label data from official national databases and brand websites, as declared; not lab-verified.
Common questions
Is there an official upper limit for L-Arginine?
No UL has been set. We use a cited reference upper value of 8,000 mg per day. It comes from the linked study or assessment and is not a regulatory limit. [source]
How much L-Arginine do products usually contain per day?
As of 2026-11-01, 717 products list a comparable daily dose (769 dose records; one product can have several). The median is 625 mg per day, and 90% of records fall between 25 and 3,000 mg. Figures come from labels and are not lab-tested. [source]
Top ranked
| Rank | Brand | Product | Per day | Score |
|---|---|---|---|---|
| 1 | Twinlab | L-Arginine | 500 mg | 100.0 |
| 1 | Spring Valley | L-Arginine 500 mg | 3,000 mg | 100.0 |
| 1 | Swanson | L-Arginine 500 mg | 1,000 mg | 100.0 |
| 4 | Nature's Bounty | L-Arginine 1000 mg | 1,000 mg | 97.8 |
| 4 | Vitamin World | L-Arginine 500 mg | 500 mg | 97.8 |
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.