The internet is a prominent source of health information for the public. This research
evaluated both basic use and design tenets and the presence of theoretical components
to motivate healthy breast cancer behavior for users of the most frequented breast cancer
websites. Methodology: Each website was evaluated with 2 sets of questions. The
first attends to the basic use and design tenets of the website. The second coding form
assessed the websites use of 3 behavior change theories. Results: The majority of the
websites fared well with regards to their use of basic tenet and design principles. Theoretical
components were used sparingly on the majority of websites. Discussion: The
most frequented breast cancer websites are currently well equipped with basic use and
design tenets. However, their lack of behavioral change components is likely to impede
users’ motivations to protect themselves against breast cancer.