Hollywood star Cameron Diaz has taken a page from her good friend Gwyneth Paltrow and written a book on nutrition and health.
 

"The Body Book: The Law of Hunger, the Science of Strength, and Other Ways to Love Your Amazing Body" is due out December 31 and available for preorder via Amazon for $16.43.
 

Rather than focusing on a seven-day or month-long diet plan, the book "offers a holistic, long-term approach to making consistent choices and reaching the ultimate goal: a long, strong, happy, healthy life," a promo reads.

Diaz, 41, also focuses on debunking the hype around food groups, explains the benefits of vitamins and minerals, and delves into the rationale of embracing "the instinct of hunger to satisfy it with whole, nutrient-dense foods."

A renowned fitness fan and surfer, Diaz also focuses on the much-needed benefits of a daily workout to stave off disease and boost mood and energy levels.

But she admits that she wasn't always such a health eater. "If you are what you eat, I was a bean burrito with extra cheese and extra sauce, no onions," she said, adding that her formerly poor diet negatively affected her skin and body. To make changes, she began learning about nutrition and well-being, and says her new book is a result of all that she's learned.