The secret to losing weight and building muscle? According to Nike trainer Marie Purvis , one thing is key: "Thirty grams of protein within 30 minutes of waking up." Easier said than done, but if you make this smoothie recipe from actress Jennifer Aniston , you're one breakfast down to weight-loss success. Jen loves this recipe because it resembles a milkshake but doesn't skimp out on the nutrients. With over 30 grams of protein and 10 grams of fiber, it'll leave you feeling full and energized straight into lunch!