If you do some diet, better to take fresh juice from fruits and vege and refrain from solid foods at least for a month. These will not only reduce your weight significantly but also your body toxins will be washed out. At first few days, you will feel uncomfortable and dizzy this is due to the toxins that flushing out in your body but after that you will feel good and light. These is not advisable to those who took maintenance medicine and pregnant women. Just refer first to your doctor for safety and assurance.