The original keto diet consisted of one gram of protein for each kilogram of body weight, plus 10-15 g of carbs and the remaining calories from fat, which was pretty extreme. Nowadays, specialist dieticians calculate the amount of fat, carbohydrate and protein that each patient needs based on their body weight and nutritional requirements. This can make the diet easier to follow and reduce the risk of deficiency. A typical day's diet might involve double cream, meat, eggs, butter, vegetable oil with a few servings of low-carb vegetables and fruits, like celery, apple or berries. Starchy carbs, like bread, pasta, breakfast cereals, potatoes and rice, are excluded, as are bananas, peas, and corn.