Zinc is now a very common ingredient in many cold and flu formulae in recent years, and for good reason. Some nutrients that are known to interact with the immune function, seem to have performed haphazardly in clinical trials for treating the common cold. However, zinc has consistently performed very well in trials, delivering a reduction in the duration and severity of colds and upper respiratory tract infections. So, how does it deliver these effects? Zinc is used by most of the white blood cells within our immune system, to actual code their genes. These genes regulate all of the internal processes that will control the way in which the white blood cells respond to pathogens and troubled tissues. Zinc is also used to regulate phagocytosis and the production of cytokines. Zinc in and of itself also has an antimicrobial effect. As such it is found in the mucous secretions of the upper respiratory tract.
Best sources of Zinc
- Pumpkin seeds