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 National Institute of Diabetes and Digestive and Kidney Diseases and the FDA’s weight-loss product notifications.

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 unusual.

The first is that berberine works backwards from what people expect. Most consumers who have heard anything about herb-drug interactions have heard about St John's Wort, which reduces the effectiveness of medicines. Berberine does the opposite: it inhibits CYP3A4, CYP2D6 and CYP2C9, which raises blood levels of drugs a prescriber has carefully titrated. Someone applying the mental model they already have will reach the wrong conclusion. It also carries a pregnancy contraindication that no page selling it should omit.

The second is complete dose opacity. A proprietary blend with three named ingredients and zero published amounts cannot be evaluated by any reader, however careful. The only tool left is arithmetic — what a capsule physically holds versus what the research used — and that is what this site publishes.

The third is the audience. Weight-management products are bought disproportionately by people who have tried several things already, and unexplained weight change can be the first sign of thyroid disease, diabetes or depression. A purchase can quietly substitute for a diagnosis.

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 the pregnancy contraindication, the CYP450 interactions, the complete absence of published doses, the capsule-ceiling arithmetic, the green tea liver signal, the return requirement inside the guarantee and the fact that no independent review record exists. If we only published favourable material the links would be worth more and the site would be worth less.

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.