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Published Jan 8, 2024

How to Prevent & Treat Colds & Flu

Andrew Huberman delves into the complex workings of the immune system, the impact of stress and exercise on immunity, and the role of supplements like vitamins and zinc in combating colds and flu, providing listeners with practical strategies to enhance their body's defenses.
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  • Innate Immunity

    The innate immune system acts as the body's first line of defense against viruses like the cold and flu. explains that it responds quickly and non-specifically to infections, deploying chemicals that mark infected cells for destruction by natural killer cells 1. This system also releases cytokines, such as interleukin one and six, which help combat infections and repair damaged cells, often causing swelling and increased blood flow to affected areas 1.

    The innate immune system is very fast, and it is agnostic to the type of infection.

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    Huberman emphasizes the importance of rest when feeling unwell, as pushing through fatigue can compromise innate immune function 2.

       

    Adaptive Immunity

    The adaptive immune system provides a more targeted response, creating antibodies specific to the virus that has invaded the body. describes how this system not only fights off infections but also retains a memory of them, allowing for quicker responses to future encounters with the same virus 3. This memory is stored in stem cells, enabling the production of highly specific antibodies when needed 4.

    The adaptive immune system maintains a memory of that battle and keeps within your body.

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    This system's ability to adapt and remember past infections is crucial for long-term immunity.

       

    Stress & Immunity

    Stress plays a dual role in immune function, with short bouts potentially enhancing immunity while chronic stress can be detrimental. highlights that cortisol, often labeled as harmful, is essential for activating natural killer cells and inflammation, both vital for combating infections 5. However, excessive cortisol can impair sleep and gut health, weakening the immune system 5.

    Cortisol is fantastic, provided that it is elevated early in the day and not late in the day or evening.

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    Balancing stress levels and ensuring adequate sleep are key strategies for maintaining a robust immune system.

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