Evidence supporting the use of: Salt
For the health condition: Colds (decongestant)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Synopsis: Salt, specifically in the form of saline (salt water), is widely used to help alleviate symptoms of the common cold, particularly nasal congestion. The most common methods are saline nasal sprays or nasal irrigation (such as with a neti pot), which are designed to moisturize nasal passages, thin mucus, and help clear out allergens and pathogens. Scientific studies have shown that saline irrigation can reduce nasal congestion, improve mucociliary clearance, and decrease the need for additional medications in both adults and children with upper respiratory tract infections. The mechanism is primarily mechanical—saline helps flush out mucus and debris rather than acting as a pharmacological decongestant. Several randomized controlled trials and systematic reviews have supported the modest benefits of saline irrigation for symptom relief, though the effect size is generally moderate and not as strong as some pharmacologic treatments. There is less evidence supporting salt as an oral decongestant or systemic remedy for colds. Overall, saline nasal irrigation is considered safe, inexpensive, and beneficial as an adjunctive therapy for nasal symptoms of the common cold, but it should not be viewed as a cure or primary treatment.

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