Daily Habits That Weaken Immune System
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28 September 2025
1. Poor Sleep: Getting less than 7-8 hours of quality sleep disrupts immune cell function, reducing your body's ability to fight infections
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2. Unhealthy Diet: Consuming excessive sugar, processed foods, or lacking nutrients like vitamin C, D, and zinc starves your immune system of essential building blocks
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3. Chronic Stress: Persistent stress raises cortisol levels, which suppresses immune responses and increases inflammation
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4. Lack of Exercise: Sedentary behaviour reduces immune cell circulation, while overexercising without recovery can also strain immunity
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5. Smoking or Vaping: Tobacco and nicotine damage immune cells and increase susceptibility to respiratory infections
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6. Excessive Alcohol: Heavy drinking disrupts gut health and weakens immune defenses, especially in the lungs
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7. Poor Hygiene: Not washing hands regularly or neglecting oral health allows pathogens to enter and overburden the immune system
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8. Dehydration: Inadequate water intake impairs cell function and mucus production, which are key for immune barriers
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9. Overuse of Antibiotics: Misusing antibiotics disrupts gut microbiota, which plays a critical role in immune regulation
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10. Social Isolation: Lack of social interaction or chronic loneliness can elevate stress hormones, indirectly weakening immunity
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