NOW Foods L-Arginine 1000mg
by NOW Foods
"Nitric oxide precursor for blood flow, circulation, and cardiovascular support — 120 tablets at NOW value"
Overview
NOW Foods L-Arginine 1000mg provides the amino acid L-arginine, which is the direct precursor to nitric oxide (NO) — the molecule that relaxes blood vessels and improves blood flow. Nitric oxide production is critical for cardiovascular health, exercise performance (muscle pump), erectile function, and wound healing. L-arginine is converted to nitric oxide by the enzyme nitric oxide synthase (NOS). While citrulline has gained popularity as an indirect NO booster, arginine remains the direct precursor and is widely used for cardiovascular and circulatory support.
Key Ingredients
| Ingredient | Amount |
|---|---|
| L-Arginine | 1000 mg |
Pros & Cons
What We Like
- Direct nitric oxide precursor
- 120 tablets (2-4 month supply)
- NOW Foods value pricing
- Supports cardiovascular health
- 15,000+ Amazon reviews
What Could Be Better
- 1000mg per tablet (clinical doses are 3-6g)
- May need 3-6 tablets for therapeutic dose
- Can cause GI discomfort at high doses
- Citrulline may be more effective for NO
Who Is This For?
Best For
- Cardiovascular and circulation support
- Nitric oxide production
- Blood flow improvement
- Exercise performance (pump)
Not Ideal For
- Those with herpes (arginine can trigger outbreaks)
- Those preferring citrulline
- Those wanting single-dose convenience
Our Verdict
NOW L-Arginine is the affordable, straightforward way to support nitric oxide production. The 1000mg tablets allow flexible dosing from maintenance (1-2g) to therapeutic (3-6g). For pure NO production, arginine remains the direct precursor.