The O2 Diet: Food for Thought

Despite some of the book's unsubstantiated claims -- such as that The O2 Diet can make you more beautiful or give you energy off the charts -- there is little downside to eating a wholesome diet high in antioxidants.

Add some calcium-rich foods, whole grains, and lean protein to give yourself a few more calories, and you'll have a greater chance of sticking with the program beyond 32 days.

If you're looking for a beauty boost, keep in mind that healthy, balanced diets, along with regular physical activity, can help keep your skin, nails and hair looking their best.