"Cleansing" diets are meaningless to me. Our liver, lungs, kidneys and colon cleanse us every day. Food cannot cleanse you. Can it make your organs function slightly better because you are not taxing them as much...possibly, but honestly, our bodies are made to handle a lot of abuse (hopefully we don't test it).
If you are trying to do a low-carb diet to lose weight, fruit and fruit smoothies are the same as eating candy. Yes, fruit has healthy aspects to it compared to sugar, but the pancreas reacts to glucose in the blood stream and dumps out insulin whether you ate a candybar or an apple.
Robyn, I hate to disagree about calories in/calories out. Reading Gary Taubes really altered how I felt about that. We were trained that this was fact, but hormones really rule our bodies.
An example with female rats fed "X" amount of calories. These little gals had no choice on how much they ate. They took these SAME RATS and took out their ovaries. They fed them the SAME amount of food to the SAME rats, minus their ovaries...they got huge. Same calories....different hormones.
I think this is why it is so difficult to categorize which diet "works" for everyone===we are all different.
I was sad to read Taubes' latest book..and for some of us, even if we do low carb, our body will stabilize at a certain level and not lose much.
Of course, I am not comparing someone in starvation, who no doubt would lose regardless of hormones, but who would subject themselves to that sort of weight loss.
Thoreau said, 'A man is rich in proportion to the things he can leave alone.'