To complete phase 1 of the Atkin's diet, reduce total carbohydrates to less than 20 gm day for at least 2 weeks. During induction, you lose water weight rapidly and the energy processes of the body switch from using carbohydrates to using fat stores. This process results in ketosis. Using a carbohydrate counter will help you to keep track of carbs and identify hidden carbohydrates in your diet. Take water, fiber and vitamin supplements and decrease caffeine intake. There may be a carbohydrate withdrawal period accompanied by headaches, fatigue, irritability and inability to fall asleep. Testing your urine with ketosis strips will show you how quickly your body changes over. All carbohydrate stores typically leave the body within 2 days.