For men following the SlimFast Keto Plan, the recommendation is to consume approximately 1,600-1,700 calories per day. The recommendation for total carbohydrates is a range from 10% to 18% of those total calories, which equates to a range of about 40-77 grams of total carbs. SlimFast recommends getting enough fiber in your diet, which should range from about 15g to 38g per day for men. This means that the recommended net carbohydrate range should be from about 25g to 39g per day, which calculates back to about 5% to 10% of net carbs per day.