Common habits that weaken the immune system without you knowing

Weak immunity can stem from various lifestyle habits. Chronic stress elevates cortisol, weakening immune function, while late nights impair immune responses. Sedentary lifestyles, especially in older adults, contribute to immune dysfunction. Frequent consumption of ultraprocessed foods disrupts gut health, and neglecting handwashing increases pathogen exposure. A diet lacking fruits and vegetables deprives the body of essential immune-boosting nutrients.

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