As always, it comes down to calories consumed versus calories expended. Some research has shown that eating the majority of our calories during the day and then fasting after dinner can help promote weight loss. But other studies point out that total calorie intake and expenditure are the two primary reasons for weight loss ‑- or gain. To put it simply, by not eating in the evening, we may consume fewer calories than our body burns over the course of each 24-hour period, and that will help us lose weight. No magic tricks here; just a little simple arithmetic.