Does Dairy Really Cause More Mucus?

"Cut out dairy when you've got a cold" is advice passed down through generations. But does milk actually make you produce more mucus?

What the research found

Studies that have tested this — including ones where people didn't know whether they were drinking cow's milk or a soy substitute — have generally found no increase in mucus production from dairy. People who believe milk causes mucus are more likely to report the sensation, whatever they drink.

So why does it feel that way?

Milk mixes with saliva to create a slightly thicker coating in the mouth and throat. That texture can feel like extra mucus even though your airways aren't producing more. It's a sensation, not a change in how much mucus you make.

Exceptions

People with a genuine milk allergy or intolerance may have different reactions, and should follow their doctor's advice.

What really affects mucus

Hydration, humidity, allergies, infections, smoke and reflux have far more influence on mucus than a glass of milk. Focus on those, and your mornings are more likely to improve.

⚠️ These statements have not been evaluated by the FDA. BreathiZen® is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease. Talk to your doctor before starting any supplement.