About FactoWiki
FactoWiki is an independent resource that helps people understand health supplements before they buy.
Supplement marketing is built to sell, not to inform. A typical sales page leads with a dramatic promise, buries the actual ingredient amounts, invents urgency, and rarely mentions who should avoid the product or what the research really shows. FactoWiki exists to fill that gap. For every ingredient and product we cover, we set out four things in plain language: what it actually is, what the published evidence does and does not support, what it costs and how it is sold, and the safety considerations that matter — including who should steer clear.
Why we started FactoWiki
Most people researching a supplement are trying to answer a simple question: "Is this worth my money, and is it safe for me?" Yet the information they find is usually either a sales page with a stake in the answer, or a thin "review" site that is really just another sales page in disguise. We wanted a place that treats the reader as the customer — not the product — and that is willing to say plainly when the evidence is weak, when a formula hides its doses, or when a category carries real risks. That willingness to deliver inconvenient answers is the whole point of the site.
What we publish
FactoWiki has four kinds of pages. Ingredient guides explain how a common supplement ingredient works, the doses studied, the strength of the evidence, and who should be cautious. Product guides assess a specific supplement against its own marketing — ingredients, claims, pricing, safety and honest alternatives. Category guides give an overview of a health area and the ingredients most relevant to it. Comparison pages put similar products side by side so you can judge them by what is actually inside.
How we make money — and why it doesn't bend our verdicts
Some links on FactoWiki are affiliate links: if you buy through one, we may earn a commission at no extra cost to you. We are upfront that this is how the site is funded. The crucial point is that the commission never changes what we write. We describe the evidence, the dosing transparency, the safety profile and the alternatives the same way regardless of whether a page earns anything — and several of our product guides openly criticise products we link to, because that is what the evidence supported. Read our affiliate disclosure for the full explanation.
Who writes and reviews our content
Content is produced and reviewed by the FactoWiki Research Team and checked by a Supplement Research Editor before publishing. We are an editorial team rather than a single named "doctor" — and we deliberately do not invent a fictional medical persona to sign our pages, because that is one of the trust-eroding tricks this site was built to avoid. Instead, every page links the primary sources it relies on so you can verify the claims yourself. Our full process is described in how we review supplements and our editorial policy. You can also read more about the FactoWiki Research Team and the Supplement Research Editor role.
What we are not
FactoWiki is an educational resource, not a medical provider. We do not diagnose, treat or give personal medical advice, and nothing here replaces a conversation with your doctor or pharmacist. See our medical disclaimer. We also do not sell supplements ourselves, invent customer reviews or star ratings, or accept payment to make a product look better than the evidence warrants.
Contact and corrections
We would rather be corrected than be wrong. If you spot an error — a changed price, a mis-stated ingredient, a broken link — please get in touch. We review every report and fix verified mistakes promptly, as set out in our correction policy.
How to use FactoWiki
If you are weighing up a specific product, start with its product guide and read the safety and "who should avoid it" sections before the benefits — that is where the most decision-relevant information usually sits. If you are curious about a single ingredient you keep seeing on labels, the ingredient guide will tell you how strong the evidence really is and at what dose. If you are comparing two similar products, the comparison pages line them up by what is actually inside. And whatever you read here, treat it as a starting point for a conversation with your doctor or pharmacist, not a replacement for one.
Our promise to readers
Our commitment is simple: we will tell you what the evidence actually shows, we will flag the risks plainly, we will never fabricate reviews, credentials or citations, and we will not let a commission change an honest assessment. If a product isn't well supported, you will read that here — even on a page that could earn us money. That is the standard we hold ourselves to, and the reason FactoWiki exists.