Skipping meals intermittently for two weeks didn’t change how the body uses sugar, fat, or muscle protein in healthy, lean people—even when their insulin levels were raised.

After two weeks of skipping meals intermittently, the body burns fewer calories at rest—which could make you gain weight if you keep eating the same amount.

After two weeks of intermittent fasting, certain muscle signaling molecules changed—GSK became more active and mTOR less active—but these didn’t translate into changes in how the body used sugar or muscle protein overall.

People with metabolic syndrome who try intermittent fasting lose about 4 pounds on average after a few months, even without counting calories.

Specific intermittent fasting patterns (one 36-hour fast per week, two non-consecutive 24-hour fasts, or three separate 16-hour fasts) increase norepinephrine, fat oxidation, and glucose tolerance while avoiding metabolic downshift.

People with metabolic syndrome who follow intermittent fasting see their body’s insulin levels drop, meaning their body is better at using insulin to manage blood sugar.