Berries are not very high in sugar, and have high fibre content. These are just a few of the many reasons you must include berries in your diet.
The human body houses thousands of electrons. These electrons exist in pairs, and thus form a stable bond. As the body ages, different factors cause these pairs to split up. Thus unstable free radicals are created. These unpaired electrons are highly energetic and seek out other electrons with which to pair. If a free radical attaches itself to another free radical, it stabilizes. But it also can attach itself to paired electrons, stealing them and causing the pair to split creating another free radical. This can create havoc within the body.
An anti oxidant is a substance that absorbs free radicals in the body, and prevents it from creating havoc. Vitamin C is a rich anti-oxidant, and foods rich in Vitamin C include citrus fruits, berries, potatoes and broccoli. However, various studies show that of all fruits, berries - especially blue berries and strawberries, contain the highest anti-oxidant properties.
The breaking down of molecules is a by-product of ageing, and by combating free radicals berries help delay the onset of ageing.
Free radicals are also associated with cancer, Alzheimer's, cardiovascular diseases, high blood pressure and a host of other health issues. As antioxidants neutralize these nasty little radicals, they reduce the risk of contracting these diseases.
Cranberries contain tannin, which clears the urinary tract of bacteria. It helps prevent any urinary infection.
Unfortunately, berries are not available all year round. However, they are easy to freeze, and retain all their nutritional value even if eaten months later, if they have been frozen. So just buy all you can get your hands on, and dump them in the freezer!