Colon cleansers are a okinawa flat belly tonic that works quickly and keeps your body from different health problems as well. The fact is that the claims made by many of these slimming aids are unfounded, and you can easily wind up spending more than you ever wanted to on something that clearly does not work. Finding a okinawa flat belly tonic that works for you can be difficult and sometimes frustrating. Avoid taking the supplement in the late afternoon or evening.