How we rate products
Every rating answers one question: how well does published research support what this product claims to do?
The four levels
Several good-quality trials in people, with consistent results. Often a licensed medicine.
At least one decent trial in people, or strong indirect evidence, but results are limited or not yet repeated.
Small trials, trials in a different group (for example men only), or data published only by the ingredient supplier or brand.
No published research in people that we could find. The product may still feel nice to use.
What we check
- Whether studies were in people, and in women of menopause age.
- How many people took part and for how long.
- Who paid for and published the study.
- Whether the brand's claims match what the study actually found.
What a rating does not mean
A low rating does not mean a product is unsafe or useless for you. It means the research does not yet show it works. A high rating does not mean it suits everyone; always read the label and check with a pharmacist if you take other medicines.
Money and independence
We earn commission when you buy through some of our links. Brands cannot pay for a rating, and we rate products we do not earn from in the same way. Read our affiliate disclosure.
Corrections
If you spot a mistake or a newer study, email [email protected]. We review ratings at least every six months and show the date on each page.