Did you know that fruit juice has about eight full teaspoons of sugar per eight-ounce glass? This sugar is called fructose and for dieters is just as bad as table sugar. Both sugars cause an increase in insulin levels. Even if you drink freshly squeezed fruit it is still a high sugar drink.
If you want to lose weight you could be making it very difficult for yourself because of the blood sugar response and the release of fat storing hormones associated with consuming sugar.
If you are overweight, have high blood pressure or high blood sugar; it would probably be wise to avoid most fruits until you have these problems under control.