How Does Poor Sleep Affect the Immune System

Published On: 13 Sep 2025| Read By: 265 Users

Understanding how poor sleep affects the immune system is crucial for anyone who wants to maintain good health. Many people don’t realize the significant connection between the quality of your sleep and your body’s natural defense mechanisms. When you don’t get enough restorative sleep—whether it’s from insomnia, stress, or uncomfortable bedding—your immune system can’t function at its best, leaving you more vulnerable to illness. So, how does poor sleep affect the immune system exactly? Here’s a breakdown of the key impacts: Reduced Infection Resistance: Lack of sleep decreases the production of infection-fighting antibodies, making it easier for viruses and bacteria to take hold. Impaired Recovery: During deep sleep, your body produces cytokines—proteins that help fight inflammation and infection. Poor sleep reduces these vital...

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