**L-Arginine** is the body's primary raw material for producing nitric oxide, which relaxes blood vessels and supports healthy circulation. Each capsule delivers 500mg, but the clinical research on blood flow and exercise performance uses 2,000–6,000mg daily — so a single capsule covers just 25% of the minimum studied dose.
The label recommends six capsules per day (3,000mg total), which puts you squarely in the effective range for cardiovascular and blood flow support. At that intake, you're getting a clinically meaningful dose backed by moderate research evidence. The free-form amino acid format means it doesn't need to be taken with food for absorption.
The main tradeoff is pill burden. Six capsules daily is a commitment, and skipping down to one or two drops you well below the threshold where clinical benefits have been observed. If heart and circulation support is your goal, sticking to the full recommended serving matters here.
Score Breakdown
Ingredients (1)
25% of effective dose
Label Nutrition Facts
Active Ingredients
From the label · % Daily Value
L-Arginine500 mg
Other Ingredients
Fillers, coatings, and additives
Magnesium StearateLubricant
Microcrystalline CelluloseBinder
Microcrystalline CelluloseBinder
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.