Contact
One address for everything: support@periodfinder.com. A subject line from the list below gets you a faster answer.
Corrections (we want these most)
Spotted a size range or millilitre figure that doesn't match a brand's current page? Subject line “Correction”, include the brand and a link to the page you're looking at. Verified corrections ship fast and update the row's verified-date - the corrections policy is part of the methodology.
Questions
Anything the FAQ doesn't answer. One note on scope: we can explain the data, but we can't give medical advice - for flow concerns, a clinician is the right reader.
Brands
If we've characterized your product's claims and you have better first-party data (published millilitre figures especially), we'd genuinely like to upgrade your rows to grade A. Subject line “Brand data”.
While you are here
The two tools answer the questions we get asked most, without an account and without sending anything to us.