Can I opt out of having my Facebook friends find me on MyFitnessPal?
If you would like to link your MyFitnessPal and Facebook accounts, but would prefer not to permit Facebook friends to find you on MyFitnessPal, you may opt out of this feature.
On the Website:
Log in to our website (mobile app users should log in using the same email address and password they use in the app).
Once you've logged in, click "My Home" then "Settings" then "Facebook/Twitter sharing settings" and uncheck the box labeled "Allow Facebook friends to find me." Be sure to click "Save Changes" when you are finished
In our Android, iPad and iPhone apps:
In the Menu (or "More" page) tap "Settings" then "Sharing & Privacy" then "Facebook Settings" and make sure "Facebook Friends can Find Me on MyFitnessPal" is off.