We all know supermodels seem thinner than almost anyone we know or see regularly. We also know magazine images are airbrushed and manipulated so much the supermodels don't even look like themselves.
Supermodels must be 18% body fat or less. Did you know a woman's normal hormonal cycle can be interrupted at body fat percentages lower than 17 or 18 per cent? (This is the level required to have 'washboard' abs or a '6 pack' - it is too low for many women and girls.)