Some still consider fasting -- in any form -- to be "out there." "When I review diets that are not based on science, the question I ask myself is: Would I feed them to my family? In this case, the answer is a clear no," says Susan Roberts, PhD, chief of the Energy Metabolism Laboratory at the Jean Mayer USDA Human Nutrition Research Center on Aging and a professor of nutrition at Tufts University in Boston.
Opt for recipes with variety. Try to get a variety of vegetables on your plate, such as dark leafy greens, beets, artichokes, onions, carrots, and cucumbers. Add cooked chickpeas, avocado, brown rice, baked sweet potato, hemp seeds, extra-virgin olive oil, and other foods rich in protein, fiber, and fat. Better yet, look for recipes that combine a variety of plant-based ingredients like Sweet Potato and Red Cabbage Slaw.
Avoid alcoholic drinks (such as wine, beer, and spirits) during the cleanse. Alcohol is metabolized in the body mainly by the liver. It is broken down briefly to acetaldehyde, a chemical that has the potential to damage liver cells and body tissues, before it is further broken down and eliminated from the body. Besides lightening the load on your liver, avoiding alcohol (and caffeine) for the week can help to shift habits you've cultivated.
Juice diets do prevent your body from going into a state called ketosis, he says. Ketosis means your body has no carbohydrates to burn for energy, so it has to burn stored fat or whatever else is available, he tells WebMD. "You feel bad, even smell bad. That's what makes you feel like hell during a [water-only] fast. But is that because the toxins are coming out? No! You're going into ketosis. It's known physiology."