Apples Apples are the perfect pre-dinner snack. Soluble fiber in apples, called pectin, reduces the amount of sugar and calories that’s absorbed into the bloodstream after a meal. That’s good news for folks who want to prevent type 2 diabetes, but it also makes apples one of the best snacks for dieters. Apple pectin prevents spikes in blood sugar that lead to increased fat storage. It will help you avoid the blood sugar “crash” that leaves you craving more food and can keep you satiated for up to two hours.