This is a really useful link
USDA Nutrient Database, very easy to use too!
- Enter a keyword, pomegranate for example
- Select food group from drop down list, so pomegranate would be in Fruits and Fruit Juices
- Hit 'submit'
A number of choices will appear, select the one you want and select it by clicking on the circle to the left of the item and hit 'submit'
Select the amount, I always select 100g, again click the circle to the left and hit submit.
VoilaA table with the nutritional values of your selected food item will appear.