Scientists measured levels of antioxidants such as vitamin C, flavonoids and carotenoids in both pasteurized and freshly squeezed orange juice. Antioxidants protect cells from damaging "free radical" molecules.
The study showed no significant differences between commercial juices and freshly squeezed juices, demonstrating that all juices have the same nutritional characteristics.
However, researchers noted that substances might work differently in the human body than they do in tests.
Journal of the Science of Food and Agriculture March, 2003
Freshly squeezed fruit juice has about eight full teaspoons of sugar per eight-ounce glass. This sugar is typically a fruit sugar called fructose, which is every bit as dangerous as regular table sugar since it will also cause a major increase in insulin levels.
This doesn’t mean that you should avoid fruit, just fruit juice. When the fruit is intact and whole, its fiber will somewhat moderate the release of fructose into the bloodstream as well as somewhat moderate insulin release.
However, 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.
This is especially true if you are a protein Metabolic Type. Carb/vegetarian types do far better with fruits, especially citrus fruits, in general.
Berries, especially blueberries, raspberries and cranberries, are some of the healthiest fruits as they are loaded with powerful antioxidants and have relatively small amounts of sugar.
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