Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Menthol is commonly used in over-the-counter remedies for nasal congestion, such as topical rubs, inhalers, and lozenges. Its use is based on both traditional practices and scientific investigation, but the scientific evidence for its efficacy is limited. Menthol does not actually decongest nasal passages by reducing swelling or mucus. Instead, it interacts with the cold-sensitive TRPM8 receptors in the nasal mucosa, producing a sensation of increased airflow and a cooling effect. This subjective sensation can make people feel as though their breathing is easier, even though objective measurements show no significant improvement in nasal airflow or actual decongestion.

Clinical studies have shown that while menthol provides a perception of relief, it does not significantly impact nasal airway resistance or true congestion. For instance, research published in the journal Chest (1988) concluded that menthol inhalation improved the subjective sensation of nasal patency without measurable physical benefit. Nonetheless, its ability to produce a cooling and soothing effect makes it a popular adjunct in cold remedies.

In summary, menthol's use for congestion is primarily supported by its sensory effects rather than any decongestant action. The scientific evidence rates as modest (2/5), largely due to its supportive role in symptom relief rather than in treating the underlying cause of congestion.

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Other ingredients used for Congestion

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