Phlegm might not sound glamorous, but it is one of the unsung heroes of your respiratory system, performing a vital role in keeping your body healthy and protected. While often associated with illness and discomfort, phlegm is actually a sticky, slimy substance produced daily by your mucous membranes to trap harmful particles, bacteria, viruses, and allergens before they reach sensitive areas like the lungs. Remarkably, the human body produces roughly one liter of phlegm every day, enough to fill half a two-liter soda bottle, though we rarely notice it when we are healthy. This constant production is essential to maintaining...
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