Contact us

Email [email protected].

Reporting an error or a status change

These help us most. Please include:

• The page address.
• What's wrong or out of date.
• A link to your source, if you have one: an FDA page, a study or a news report.

We check every report. Verified errors are fixed and recorded in our corrections log.

Calculator problems

Tell us the numbers you entered and the result you expected. Every calculator shows its formulas, so you can also check the math yourself.

What we can't help with

We can't give medical advice or tell anyone how much of anything to take. For that, please talk to a licensed clinician or pharmacist.