The immune system works best when the body receives proper nutrition, sleep, physical activity, and stress control consistently. Poor sleep, smoking, excessive alcohol, chronic stress, nutritional deficiencies, uncontrolled diabetes, and lack of exercise can weaken the body?s ability to fight infections effectively over time. A balanced diet with fruits, vegetables, protein, nuts, seeds and foods rich in vitamin C, zinc, iron and probiotics may naturally support immune function. Regular exercise, adequate hydration, and sunlight exposure may also help preserve energy and overall health. Good sleep is particularly important because the body heals and regulates immune activity during rest. Reduced processed foods, high sugar and smoking may improve sustained immunity and reduce inflammation. Vaccinations, proper hygiene and control of chronic illnesses are also important for infection prevention. Frequent severe infections, unexplained weight loss, prolonged fever or persistent weakness should be evaluated properly, because they may indicate an underlying medical condition affecting immunity.

Stomach discomfort after eating wheat, gluten-containing foods, or milk products may be due to gluten sensitivity, celiac disease, lactose intolerance, irritable bowel syndrome, or difficulty digesting certain food proteins. Symptoms can include bloating, loose motions, constipation, stomach cramps, acidity, gas, or fatigue after meals. The fact that curd and buttermilk are better tolerated may suggest that lactose is more difficult to digest, since fermented dairy products usually contain lower lactose levels. Doctors may sometimes recommend blood tests for celiac disease, allergy evaluation, stool tests, or dietary elimination trials to identify the exact trigger. Management usually focuses on avoiding foods that repeatedly worsen symptoms while maintaining proper nutrition. Some people improve with a gluten-free diet while others mainly benefit from reducing milk, cheese, cream or processed dairy products. Balanced meals that include rice, fruits, vegetables, pulses, lean protein and fermented foods can promote digestion. Persistent weight loss, anaemia, blood in stool, severe weakness or ongoing diarrhoea should be carefully checked because untreated food intolerance or malabsorption can affect nutrition over time.