Eating foods should be more enjoyable and less expensive in the long run. The problem with obtaining all of one's portions from juice is that juice usually has most of the fiber removed. That's why experts recommend that nutrients be obtained from food, not pills or potions. However, they are digested and perform no enzyme function within the body. Nutritionally, they have no significance beyond their nutrient content, which is minuscule because they comprise only a tiny percentage of the plant's weight.
People tend to keep their caloric intake constant.
Actually it would be added rather than substituted. This page was updated on October 17, 1999.