The right answer is: The glycemic index predicts blood sugar levels. However, you should know that currently glycemic index is widely used in various weight loss plans, as it was shown that low-glycemic foods help control appetite. See Glycemic Index Diet for Weight Loss.

California avocados are higher in calories and fat than Florida avocados. A serving of California avocado (30 grams) has 50 calories, while a serving of Florida avocado contains 36 calories. Reference: Avocado Calories and Nutritional Facts