/kloc-if you don't eat for 0/5 days, you will probably die. If we only calculate from energy consumption, we only consider fat, not muscle loss, and people who don't eat should have less activity. In this way, the daily consumption is estimated to be 1600 kcal, 15 days ×1600 = 24,000 kcal, and 7,000 kcal per kilogram of fat. In this way, you can lose 24,000 ÷ 7,000 ≈ 3.43 kg in 0/5 day.