Is there a link between dairy and mucus?

Mucus is essential in our bodies, but during an infection (such as a cold), an asthma attack or allergic rhinitis (e.g. hay fever), mucus production increases and becomes irritating. An excess of sinus-related mucus production is a symptom that is more commonly associated with air-borne allergies such as dust, pollen and animal dander. Apart from cow’s milk protein allergy, which is uncommon, there is no scientific evidence to suggest that dairy intake increases mucus production. The best approach in treating any symptom is to get an accurate diagnosis with a registered clinician.

Extra Information:

Some people who have cow’s milk protein allergy (CMPA) may also experience an increase in mucus production, usually resulting in a runny nose. Where this occurs, milk consumption triggers an immune response to harmless milk proteins. Mast cells, a type of immune cell, are activated and go on to induce inflammation of the airways and histamine production, which can lead to a range of allergy symptoms including excess mucus production.