90 pounds by the end of summer is impossible nutritionally. But, What Cathy said isnitn true either. In one year you can lose like 20-50 lbs.... it depends on the diet. Just eat healthy and excercise, and when ya get a craving for food, eat bread, chew gum or drink water... itll curb the cravings. :) My email is AMOSHER5@aol.com if ya have any questions!