Some studies have shown that congestion can be reduced when high levels of vitamin C are consumed. Vitamin C may stimulate white blood cells to function better, enabling your immune system to fight off invading microorganisms.
Flavonoids can prevent the release of histamine which causes congestion.
Foods high in flavonoids may also be beneficial for reducing allergic reactions, and reducing inflammation in the lungs and airways. Quercetin is a powerful flavonoid with anti-inflammatory properties. Capsaicin causes the burning, fiery sensation experienced after eating a hot pepper, and helps to open up the nasal passage and alleviate congestion. Allyl isothiocyanate , a compound in horseradish, stimulates the endings of olfactory nerves, induces tears, and helps to thin mucus. See the list of recipes that have met our criteria for this ailment.