What all fruits should be avoided by those who are obese or overweight?
Banana, mango, grapes, cheeku are the fruits, which should be avoided by those who are obese or overweight:
Banana (100 gm) 116Cal
Mango (100 gm) 100Cal
Chiku (100 gm) 100Cal
Grapes (100 gm) 71Cal

Which is good – fresh fruit or juice for losing weight?
Fresh fruits are a better option than fruit juice. The advantage lies in the high amount of fiber which is present in whole fruits and is absent in fruit juice. Fruits have both soluble and insoluble fiber. The insoluble fiber helps to prevent contipation and is associated with a reduced risk of colon cancer, while the soluble fiber can help to lower blood cholesterol level and the fruit juice lacks in only this property of fruits, all the fiber is destroyed or thrown as a waste product. So fresh fruits are definitely better for losing weight than fruit juice as it also fills up your stomach and leads to low calories intake.

Is peeling of the fruits a good practice?
Peeling of the fruits before eating is not good practice as peeling of covers means peeling out all the fiber of the fruits. But some fruits cannot be eaten without peeling like banana, papaya.