It also contains phenols responsible for the unpleasant taste and throat irritation, aldehydes (formaldehyde, acrolein) toxic to the cilia of the respiratory epithelium, and heavy metals absorbed by plants from the soil (cadmium, lead, chromium)
The Article References Centers for Disease Control and Prevention
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Environmental Irritants : Exposure to air pollutants, chemicals, and dust can irritate the throat and contribute to post-nasal drip, increasing the risk of developing cobblestone throat
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