The longer you go without eating at night, the less weight you tend to carry — not because fasting burns fat magically, but because it naturally reduces total food intake.

People who go without food for 18 hours or more overnight tend to gain less weight each year than those who eat again sooner after dinner — and those who snack late at night tend to gain a little more.

Skipping a meal before working out in the evening makes people eat less overall during the day, even if they feel hungrier right after exercising.

When you go without eating for 3.5 days, your body starts releasing more fat into your bloodstream than after just a half-day fast—even if your insulin levels are the same—because your fat cells become less responsive to insulin’s ‘stop releasing fat’ signal.

Prolonged fasting (72 hours) impairs glucose tolerance, resulting in higher blood glucose and insulin responses to carbohydrate intake.

Working out on an empty stomach before an evening workout makes you feel less motivated to start and less satisfied afterward, which might make you less likely to keep doing it.