For security purposes (we send password resets and other account-specific communication via email) the system will not allow more than one account per email address. For this reason, it is not possible to create more than one MyFitnessPal account using the same email address.
You will need a separate email account to create a different account. There are now many free email providers, such as Gmail, Hotmail, and AOL, that will allow you to quickly create a new email address.
Once you have a separate email address, you can then create a new MyFitnessPal account on the same mobile device or web browser.