NOW Foods L-Arginine 1000 mg, 120 Tablets bottle

NOW Foods L-Arginine 1000 mg, 120 Tablets Review

L-Arginine is a conditionally essential basic amino acid primarily involved in urea metabolism and excretion, as well as in DNA synthesis and protein production. It is an important precursor of nitric oxide (NO) and thus plays a role in the dilation of blood vessels.

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Product Focus: Sexual Health for MenAlso covers:HeartHormones

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Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →

Evidence ⓘ

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How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.

Positive Reviews

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Biohacker Mentions

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Study, Trial or Testing Result SummaryMembersHuman studies

This product gives 2 grams of L-arginine a day, which is the lowest amount that in studies (1,500 milligrams), so it counts as a dose. A review of ten trials in 540 men with mild to moderate erection found that 1,500 to 5,000 milligrams a day than a placebo. …

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Review Totals and SummaryMembers175 reviews

175 reviews · Nowfoods 102 · Target 50 · Swanson 16 · Food4less 4 · Nahdionline 3

Users of NOW Foods L-Arginine 1000 mg, 120 Tablets generally report very favorable experiences, with reviews leaning and highlighting noticeable after regular use. Across multiple platforms, a recurring theme in feedback is that users feel the supplement supports their overall energy levels and, for some, contributes to workout performance or recovery. …

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Biohacker SummaryMembersWhat our biohacker panel says

Arginine is the only ingredient here, and the panel leans toward it, though of them are sold on it. of the panel take or suggest it to nitric oxide and blood flow, mainly before workouts or endurance sessions, and some also name growth hormone, sexual performance, calmness when paired with GABA-rich foods, or use around a meal after a fast. …

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RAL SummaryMembersThe tier and why

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More DetailsMembersBody systems · Combine with · Possible side effects

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

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Supplement FactsL-Arginine 1 g

Supplement Facts

Serving Size 1 Tablet

Servings Per Container 120 Tablets

Amount Per Serving% Daily Value

L-Arginine (from L-Arginine HCl)

1 g

†

† Daily Value not established.

Other ingredients: Microcrystalline Cellulose, Hydroxypropyl Cellulose, Stearic Acid (vegetable source), Croscarmellose Sodium, Silicon Dioxide and Vegetarian Coating [hypromellose (cellulose), calcium carbonate, glycerin].

Directions: SUGGESTED USAGE: Take 1 tablet twice daily as needed. Take between meals or at bedtime with at least 8 oz. of water or juice to facilitate absorption.

Barcode (UPC) 733739000255 · Label source: Nowfoods · Report a label change

Where to BuyNOW Foods · Walgreens · Target

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Graded October 24, 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.