The actress, wife, and mother had to wear a bikini the entire time during the filming of her latest movie The Shallows

By Lauren Brown West-Rosenthal
August 17, 2016

Blake Lively filmed The Shallows wearing nothing but a bikini, mere months after giving birth to her daughter, James. Now, the actress is sharing the diet secrets that helped her get in shape so darn fast.

On the Australian radio show Kyle and Jackie O In the Morning, Blake revealed that her pre-filming diet contained no gluten or soy. "Once you remove soy, you realize you're eating no processed foods," said Lively. "So that's basically what I did. No processed foods and then working out." (Should You Really Hate On Processed Foods, though?)

While limiting her diet wasn't exactly an easy adjustment, she focused on the healthy foods she could eat. "It's all in moderation," she said. "You just have a balance of protein, carbs, and vegetables. And it wasn't the worst. Like, I was eating rice and sushi." (We're assuming she excluded the soy sauce.) Blake's trainer Don Saladino told People that she planned four small meals each day, which included a protein, veggie, and slow-burning carb (usually sweet potatoes or white rice, which is naturally gluten free).

The one meal that served up the most temptation for Blake was breakfast, as the actress shared The Shallows cast and crew would make fresh muffins every morning. "That was the hardest part," she said. "They smelled so good!"

While nixing soy and gluten from her diet might have contributed to her successful weight loss-most likely by limiting her options-neither is actually unhealthy at face value. Gluten is found many whole grains, which are part of the foundation of a healthy diet. As for soy, research has shown that soy can improve overall cholesterol levels. It's also been linked to lower blood pressure and better bone health.

The bottom line: Elimination diets aren't for everyone, and you shouldn't totally villanize soy and gluten. But to be fair, celebs like Blake often take a more extreme dieting approach for the sake of, say, a high-definition movie in a bathing suit. (That's why we love her for turning some of the focus on what her body can DO-like give birth to a whole new life.)