In a society where celebrities’ weights make the covers of tabloids and every health magazine sells a new way to look beautiful, one author is working to turn that focus inward. Renee Engeln is a professor in the department of psychology at Northwestern University and author of “ Beauty Sick: How the Cultural Obsession with Appearance Hurts Girls and Women .” She spoke with us on “Take Care” to discuss why women are especially affected by society’s focus on physical beauty.