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The protective properties of mucus are manifold. PHOTO: iStock

“I found it interesting to talk to you about a runny nose. Dr. Chantal Vallée surprises us once again by revealing the secrets of what is known as our body’s first liquid line of defence.

Whether it is in the nose, in the mouth, in the lungs or at the entrance to the genitals, mucus serves as a trap for aggressive particles. It contains 95% water, but also antibodies.

It protects, therefore, but it also lubricates. In the nostrils and mouth, it helps moisten and warm the air moving through them, making breathing comfortable.

We will be surprised to learn that each human normally produces a liter of mucus every day.

Dr. Vallée also talks about boogers and earwax.