Ketosis is defined as a metabolic state in which body does not have access to glucose and thus burns fats to produce energy and ketone bodies. As we know that the main source of energy of body is glucose. However, when you don’t take enough carbs your body is low on glucose. Since it is necessary to generate energy, therefore, body switches to fats to produce energy. When body burns fat you ultimately lose weight. This is the basic concept behind the Keto Diet. Symptoms of Ketosis are - Foul breath - Weight loss - High concentration of ketone bodies in blood, urine and breath - Loss of appetite - More focus and energy - Insomnia - Digestive disturbances