**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.
BioStacks
Other Ingredients (3)
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
How to Take It
Take it anytime
Take between meals — food blunts the rise in plasma arginine.
On an empty stomach
Split into 4 doses across the day
On the label
Suggested use: As a dietary supplement for adults, take one (1) vegetable capsule six times daily, between meals or as directed by a healthcare practitioner.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$13.49
Cheaper than 77% of 64 arginine supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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.