According to health experts, eating stale food can cause serious health damage. This is because bacteria and fungi grow in stale food, which can produce toxins in the body. This can cause problems like food poisoning, vomiting, diarrhea, and gastrointestinal upset. Stale food also reduces nutrition, which can weaken the immune system. This habit also affects intestinal health. Eat fresh food to stay healthy. Food should be eaten within 1 to 2 hours of cooking, because after 6 to 8 hours it becomes stale and harmful. Note: This information is general, consult a doctor before taking any steps.