Grape juice has been proven to be the most healthy form of fruit juice by British researchers. They state that this is the case due to grape juice containing polyphenols which are strong antioxidants which can reduce a person's risk of heart disease.

According to the research team, the popular orange juice is far down the health scale coming in far behind juices such as apple, cranberry, and of course, apple.

"The findings reveal that the variety of phenolic compounds and antioxidant capacity of the individual juices varied markedly," Alan Crozier who led the study said.

Polyphenols are plant compounds that provide colour, flavor, and taste to fruits and vegetables.

According to the researchers, purples grape juice contains 0.98 millimoles of antioxidants per liter.