Method
How we review products
The method is unglamorous: read what the seller actually claims, then check whether their own sources support it.
Most supplement reviews online are rewritten sales copy. The reviewer never examined anything — they paraphrased the vendor's page, added a star rating, and attached an affiliate link. We are an affiliate too, so the only thing that makes our review worth more than that is method. Here is ours, in full, so you can judge whether it is worth anything.
What we actually do
- Read the seller's own page, completely Every claim, the FAQ, the small print, the shipping terms, the refund policy. Not a summary of it — the actual page.
- Separate the formula from the marketing What is measurably in the product: ingredients, doses, format, how you take it. This is fact and we record it as fact.
- Check the citations If a page lists references, we look at them. Are they peer-reviewed papers or consumer blog posts? Does each one support the claim it sits next to? Do the volume and page numbers match the year given? This is where most supplement pages fall apart, and it takes about twenty minutes.
- Separate strain-level evidence from product-level evidence Research on an ingredient is not research on a product containing it. A study on a strain at a stated dose tells you nothing about a blend that will not disclose its dose.
- Name the pressure tactics Fake scarcity, struck-through anchor prices, unverifiable review counts, unnamed “doctor-formulated” credentials. These are not evidence and we call them what they are.
- Write the drawbacks first If the cons list is shorter than the pros list, we have usually not looked hard enough.
What we do not do
- We do not lab-test anything. No purity assays, no CFU counts. We could not verify a label's accuracy and we never imply that we have.
- We do not accept free product, payment, or review copy from sellers. Our only commercial relationship with a vendor is the affiliate programme, disclosed on the page.
- We do not give numeric scores. A single number out of ten collapses “the strains are well studied” and “the dose is undisclosed” into one digit that hides both. It also produces a tidy star rating for search results, which is exactly why so many affiliate sites publish one. We would rather you read the drawbacks.
- We do not invent studies, statistics, endorsements or customer testimonials. If we cannot verify it, it does not appear.
The conflict of interest, stated directly
We earn a commission when someone buys through our link. That is a real incentive to be positive, and no policy makes it disappear. What we can do is make the incentive work against itself: a review that names what is unverified is more useful than one that does not, and a reader who trusts the page is worth more than one who bounces off it.
You do not have to take that on faith. Read our ProDentim review and check whether it reads like something written to sell you a bottle.
Found something we got wrong?
Tell us at hello@knowyourmouth.com. We will check it, correct it if you are right, and note that the page was changed.