There are no benefits in a three day detox weight loss plan. You will not be able to lose any weight in such a short time and I hope that you are not harboring any such dreams. You might be able to get rid of the bad toxins in the body if you go on a three day diet. This is a good option for those who have been drinking regularly. If you want to flush out the alcohol from your system, then this is the best way to do it. Of course even this is not a guarantee. Cheers!