How can you even think that it will? First up, cleanse diets are for removing all toxins from your body and not for losing weight. If you're a coffee fan, there's a good chance that your body is riddled with toxins that may affect your skin. Cleanse diets help in removing such toxins. Anyway, weight loss diets take months and no results will be obviously visible within the first week. A healthy diet will help you lose weight in a normal manner (when coupled with regular and intense exercise sessions), so don't ever fall for these lose-weight-fast claims and diets.