Although some people may dispute the reputation that grapefruit has of being an aid to weight loss, there is a lot of evidence to suggest that it really can be one of the best healthy snacks for weight loss to eat when you are trying to shed some pounds. Recent research found that grapefruit helps to suppress the appetite and, in one study, it was found that people who ate grapefruit with every meal lost over three pounds without taking any other steps to lose weight at all.