Megan Fox seems to be in great shape again, considering she had given birth to her second son, only five months ago. The 'Teenage Mutant Ninja Turtles' actress credits her physical fitness to a low card, sugar free, Paleo diet.

"I've had to eliminate bread from my diet, so I'm on that high protein, very low-carbohydrate, very low-sugar diet. It's kind of awful," Fox told E!

Fox's weight loss is truly stunning, and it is hard to tell that she has just given birth in February. However, given the actress' past record, the rapid rate at which she lost the weight is hardly a surprise, as previously she has managed to bounce back to her pre-baby body just two months after giving birth to her eldest son, Noah.

Fox is a follower of the low-carb Paleo diet, which is also known as the Caveman diet. It emphasizes high-quality animal proteins, healthy fats, vegetables and fruits. It excludes gluten, sugar, dairy, legumes, starches, alcohol and processed foods in one's diet.

The Paleo diet is one of the most popular diets around"”Tim McGraw follows it, and the singer lost 40 pounds as a result. "Magic Man' actor Joe Manganiello is also a fan of the diet, and Victoria's Secret model Adriana Lima likewise adheres to it.

The versatility and effectiveness of this diet not only gained the loyalty of fitness fans, but also those who are concerned about their overall well-being. Fitness expert Robb Wolf says, "The Paleo diet is the healthiest way you can eat because it is the only nutritional approach that works with your genetics to help you stay lean, strong and energetic."

Research also shows that not only does the low-carb diet accelerate weight loss, it also lowers blood pressure and prevents cancer, diabetes, depression, and Alzheimer's.