Zinc plays a crucial role in supporting the immune system, helping the body fight off colds and the flu. It can reduce the duration and severity of symptoms by preventing the virus from multiplying in the nasal passages and throat. Zinc also helps activate T-lymphocytes, which are essential for immune responses. Studies show that taking zinc supplements within 24 hours of the onset of cold symptoms can lead to quicker recovery. It may also reduce the risk of getting sick in the first place by boosting the body’s defense mechanisms and maintaining the integrity of the respiratory system.