About this reference

Our editorial standard

Every factual claim on this site traces to one of four primary sources: the official order page, the published return policy, the product artwork supplied by the manufacturer, or peer-reviewed literature indexed on PubMed and summarised by bodies such as the NIH Office of Dietary Supplements, the National Center for Complementary and Integrative Health, the NHLBI DASH eating plan and the American Heart Association on high blood pressure.

Where a figure is not disclosed, we write that it is not disclosed rather than filling the gap with an estimate. Where the format of a product cannot deliver an ingredient’s researched dose, we show the arithmetic rather than asserting a conclusion. Where a marketing claim is inaccurate, we correct it on the same page that carries our affiliate link.

Why this product gets extra scrutiny

Three reasons, and the first is the one that changes the stakes.

The first is that hypertension is symptomless and treatable. Someone who buys a supplement, sees a reading improve and quietly reduces their prescribed medication has made a decision with consequences measured in strokes. That is a different order of risk from a supplement that simply does not work, and it is why the instruction never to change prescribed medication appears on every page of this site rather than once in a disclaimer.

The second is that this formula acts on the same pathway as real medicines. L-arginine and L-citrulline drive nitric oxide production; nitrates donate nitric oxide directly; PDE5 inhibitors prolong its signal. Three routes to one effect, in an audience where nitrate prescriptions are common. To its credit the seller names nitrates — but a buyer needs to understand why, not just that.

The third is the arithmetic. The seller publishes a 500 mg blend total against a literature that used 9,000–18,000 mg daily. That is a rare situation: usually a reviewer has to reason around missing numbers, and here the number is printed. When a company gives you the means to check its product, the least a reference can do is check it.

Why we also publish what the seller gets right

This page is more restrained than most in the category, and we say so repeatedly: no invented anchor price, no countdown timer, no “#1” claim, no disease claims, an explicit testimonial disclaimer, and an unusually clear statement that there is no subscription. A reference that finds only fault is as useless as one that finds only virtue, and readers can tell the difference.

Why we carry affiliate links

This site earns commission when readers buy through our links. We disclose that in the footer of every page and on our affiliate disclosure page. The commission does not change what we publish: the same pages that link to the product also document that the 500 mg blend is roughly 3–6% of the dose used in the trials behind these amino acids; that the per-ingredient split is not published; that the Day 7–180 timeline promises outcomes the formula has no basis for; that the 17,294 reviews and 4.8 rating link to no verifiable source; that a randomised trial of L-arginine in post-heart-attack patients was halted early over a mortality signal and appears on no page selling it; that the capsule is gelatin and therefore not vegetarian; and that this brand’s many websites publish contradictory ingredient lists.

We also say plainly where this seller does well, and there is more of that than usual: no invented anchor price, arithmetic that multiplies correctly, no countdown timer, an unusually generous refund policy, correct use of “FDA-registered” rather than the false “FDA approved”, an accurate description of the nitric oxide mechanism, and advice that its own smallest package best fits the guarantee window. A site that only criticised would be as useless as one that only praised.

How we date our pages

Prices, formulations and policies change without notice. Every page carries the date its claims were last verified against primary sources. If you are reading this more than a few months after that date, confirm current pricing and terms on the official order page before buying. Spotted something out of date? Send us a correction.