Fresh, Frozen, or Canned Fruits ― don’t think just apples or bananas. All fresh, frozen, or canned fruits are great choices. Be sure to try some “exotic” fruits, too. How about a mango? Or a juicy pineapple or kiwi fruit! When your favorite fresh fruits aren’t in season, try a frozen, canned, or dried variety of a fresh fruit you enjoy. One caution about canned fruits is that they may contain added sugars or syrups. Be sure and choose canned varieties of fruit packed in water or in their own juice.
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.
But the psychological or spiritual effect can't be discounted, says Dillard. "People love the idea of cleansing, of purification rituals, going to the Ganges, to the spa. It has powerful psychological, religious, spiritual meaning. That has its own positive effect on health. But we need to separate that from saying this is science or good medicine."