Why Is Cranberry Juice Good For You?

Cranberry juice is rich in antioxidants and anthocyanidins which both help keep the skin healthy.  Antioxidants are also believed to fight the nasty elements of free radicals and so help the immune sysytem and possiby ward off potential cancer cells from forming.
Cranberry juice can also help to treat infections of the urinary tract such as cystitis or kidney stones.  This is because they are a rich source of quinic acid which helps to increase the levels of alkali in the urine, thereby reducing its acidity.
It is also very rich in Vitamin C which cannot be stored in the body and has to be taken on a daily basis.  Vitamin C helps the body to process other nutrients, particularly iron, calcium, amino acids and other vitamins, namely A, B and E.
The berries also have a strong disinfectant effect on any bad bacteria in the digestive tract, so can be useful in treating mild diarrhea.  So they are something of a good all rounder.

It's also very high in sugar so don't go overboard.

If you chose the right brand, it will have very little sugar in it.