Answer: This is one of those claims that just refuses to die, despite evidence and research to the opposite. In 1990 a study was done with adults with rhinovirus (the common cold) who were given milk, and their production of mucus was studied. The conclusion was that the consumption of milk “…was not associated with an increase in upper or lower respiratory tract symptoms of congestion or nasal secretion weight…”

There was also a study done comparing cow’s milk and a soy placebo and there was no difference in perception of sensory effects.

The consensus in the medical community is that thicker, creamier fluids may be perceived as more difficult to swallow when you have a cold because they may seem to coat the tongue and throat, leading some to believe they are creating mucus – when they do not.

Both cow’s milk and soy are a good source of nutrients, but if you or a child have difficulty swallowing milk or soy beverages when sick, temporarily switch to beverages that are soothing and may seem to be more easily consumed.

Sources: https://pubmed.ncbi.nlm.nih.gov/8452378/

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Leah McGrath, RDN, LDN

Ingles Markets Corporate Dietitian

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