Nutrition Buddy
Intermittent fasting (IF) shows promising but not miraculous evidence. The benefits of IF are mostly from reducing total calorie intake and extending the overnight fasting window — not from some magical metabolic switch. Evidence for: (1) 16:8 IF reduces spontaneous calorie intake 300-500/day (you skip a meal). (2) Extending the overnight fast to 16h improves insulin sensitivity. (3) Autophagy (cellular cleanup) increases after ~16-18h of fasting — but the evidence for human benefits is mostly from animal studies. Evidence against: (1) IF is not superior to regular calorie restriction for weight loss when calories are matched. (2) IF can cause muscle loss if protein intake is too low. (3) IF can trigger disordered eating patterns in susceptible individuals. Practical takeaway: IF is a tool, not a magic solution. If skipping breakfast helps you control calories and you feel good — do it. If you are hungry and miserable — do not do it. The best diet is one you can sustain. Break your fast with protein (not carbs) to minimize insulin spike.