While there are no disadvantages of eating vegetables, according to leading nutritionists, WebMD warns that sticking to an explicitly vegetarian diet can cause nutritional deficiencies. WebMD mentions vitamin B12, omega-3 fatty acids, iron, zinc, calcium and vitamin D as vital nutrients that are not present in a plant-based diet.
Dr. Lee Kurisko, the Chief Medical Officer of MediBid, says that vegetarian diets are usually high in carbohydrate content with little or no fats. This leads to a rise in blood sugar and, therefore, insulin, two significant causes of the body aging faster. Sticking to a vegetarian diet can also lead to problems for children including slow growth, reports The Independent.