Diets that are designed around increasing carbohydrate intake while decreasing fat intake are often referred to as ‘high-carb, low-fat’ diets. One type of diet of this type was offered by Dr. Dean Ornish alongside a few other authors. The diet was meant for people with coronary disease, obesity, and cardiovascular diseases. The daily energy needs for those who undertake the diet are covered by carbs and even then, it was at only 65-70% of the needed amount. The diet has a lot of variability and it is not that hard to maintain. However, it does have a disadvantage in that it is not balanced. It requires additional vitamins and protein additives for a complete and healthy lifestyle. Diets that work on this principle of increasing carbs are very similar to vegetarian diets.