Nutricost L-Arginine 1000 mg Review

Nutricost L-Arginine Tablets provide 1,000 mg of L-Arginine per tablet, which the page describes as a double strength dose. Each bottle contains 150 or 300 tablets, and the page states that this gives 150 or 300 servings of L-Arginine per bottle. The product is listed as non-GMO and gluten free and is made in a GMP compliant, FDA registered facility. Nutricost states that its products are made in the USA using globally sourced ingredients. The page says products are tested by an independent, accredited lab to help verify that what is on the label is what is in the bottle. Nutricost also describes a quality approach built on transparent labeling and reliable manufacturing, and the page lists a 60-day money back guarantee on all orders. Customers can choose between the 150 tablet and 300 tablet sizes. The page presents the product as a simple, accessible amino acid supplement, consistent with the brand's stated goal of clear labeling and fair prices without unnecessary fillers.

Product Focus: CirculationAlso covers:HeartRanked among:Nitric oxide supplements
Tier ⓘ
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Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$3

Study, Trial or Testing Result Summary

MembersHuman studies

12 of these 32 human studies gave l-arginine by drip or injection, not by mouth.

Studies of L-arginine for blood flow are , and this product gives 1000 mg a day, the doses that in studies. The largest and longest trial gave 133 people with leg artery disease 3 grams daily for 6 months. …

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Review Totals and Summary

Members2,117 reviews
2,117 reviews · IHerb 1,747 · Nutricost 303 · Walmart 55 · Ebay 12

This Nutricost L-Arginine 1000 mg supplement has garnered approximately 2105 ratings across various stores, with a ——giving it 4 or 5 stars. Overall, customers express with its perceived effectiveness, quality, and value. **What buyers say it did for them:** users report in blood flow and circulation, which they link to enhanced workout performance, endurance, and muscle pumps. …

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Biohacker Summary

MembersWhat our biohacker panel says

use it before workouts or endurance sessions for performance and a pump, and one also points to sexual performance, with a dose of around 5 grams. Others mention it for growth hormone, for calmness when paired with foods rich in GABA, or as a mild vessel opener for older people; forms mentioned include L-arginine, arginine nitrate and arginine ketoglutarate. …

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RAL Summary

MembersThe tier and why

More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Cardiovascular system, Circulatory system. Combine with and possible side are for members.

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Supplement Facts

L-Arginine 1000 mg
Supplement Facts
Serving Size 1 tablet
Servings Per Container 150
Amount Per Serving% Daily Value
L-Arginine1,000 mg†
† Daily Value not established.

Other ingredients: Microcrystalline cellulose, hydroxypropyl methylcellulose, calcium carbonate, coating powder, sodium carboxymethyl starch, magnesium stearate.

Directions: As a dietary supplement, take 1 tablet daily with 8-12 oz of water or as directed by your healthcare professional.

Label source: the brand's label · Report a label change

Where to Buy

Nutricost · iHerb · Walmart
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Our articles on this subject

Graded October 26, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.