I have been feeling unwell lately and am worried about catching a cold. I would like to know how to improve my immune system to prevent colds.

Methods to Boost Immunity and Prevent Colds:

First, improve lifestyle habits: ensure 7-9 hours of high-quality sleep each night, avoid staying up late, maintain a positive mood, quit smoking and limit alcohol consumption, wash hands frequently, change clothes regularly, and keep the living environment clean and well-ventilated;

Second, maintain a balanced diet: consume fresh fruits and vegetables, whole grains, high-quality proteins, and healthy fats rich in vitamin C, vitamin D, zinc, etc., reduce processed and high-sugar foods, and appropriately include foods such as eggs, milk, carrots, and oranges;

Third, increase physical activity: engage in at least 150 minutes of moderate-intensity exercise per week, such as jogging, yoga, or swimming, but avoid overexertion;

Fourth, take proper precautions: during flu season or periods of high incidence of colds, avoid crowded and poorly ventilated areas, wear a mask when going out, and pay attention to weather changes to adjust clothing accordingly.

Adjusting these lifestyle factors can enhance immunity and reduce the occurrence of colds. If physical weakness persists, it is recommended to consult a doctor for a comprehensive examination. Additionally, maintaining an optimistic mindset also helps boost immunity.