@gollum,
Whole fruit protect against diabetes,but juices of fruit is risk factor
Eating grapes,apples,blueberries and pears cuts the risk but drinking of fruit juice can increase your diabetes.Researchers including a team from Harvard School of Public Health in the US
By Research fruit bluberry cut the risk by 33 % while raisins and grapes cut 19 %.Apples and pears cut 13 % lower.
It is becouse of Fluids pass through the stomach to the intestine more rapidly than solids. So, Juices affects rapidily on diabetes.So, You can eat fruit but not much fruit juices.