The Dynamic Duo! C-Block 90 tabs plus F-Block 90 tabs. C Block is the original carb blocker that has been helpful to low carb dieters for over 8 years! C-Block is ephedra free, caffeine free, stimulant free and easy to use. Whether you are on a low carb diet or considering it, c-block may help you reach your weight loss goals when combined with a healthy diet and exercise program! F-Block: Without fats, eating just wouldn't be the same. Steak, hamburger, ice cream, chocolate, salad dressing, cheese and peanut butter contain fat. Fats provide much of the great taste and texture for which we prize these and other foods. F-block may help you reach your fat loss goals when combined with a healthy diet and exercise program!