Pomegranate juice is high in Vitamin C and other necessary nutrients and should be part of a balanced diet. It is acidic and high in sugar so consult your doctor.
Pomegranate juice contains 40% of the US RDA of Vitamin C. It also contains Vitamin A, E and folic acid along with antioxidant properties. So, two glasses should be fine.
A 250 ml (8 oz) glass of pomegranate juice provides approximately 50% of an adult's recommended daily allowance (RDA) of the vitamins A, C and E, 100% RDA of folic acid, and 13% RDA of potassium.