This is based on a ratio of grams of fat to grams of carbohydrate and protein. For example, a 4:1 ratio equates to 4g of fat to every 1g of protein and carbohydrate combined. Your ketogenic team will advise on what ratio suits you or your child’s needs. In this diet all foods must be carefully prepared and weighed/measured. Every meal and snack should be in the correct ratio and all of it eaten, for the diet to be most effective.