Intermittent fasting can help aid weight loss, unless you overeat in your window, eat unhealthy foods, and more. here, an rd shares big fasting diet mistakes.. Intermittent fasting also offers big benefits for your body and brain. it can ward off chronic disease, help your body work better and improve your mood. read on for the science behind intermittent fasting and weight loss, plus tips to maximize your fast. how weight loss works with intermittent fasting. The weight loss benefit is how i first got introduced to intermittent fasting (or if for short). like most other approaches to weight loss, the overall goal is to reduce calories without malnutrition..