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Among the oldest, and perhaps the wisest, cold and flu remedies is Grandma's favourite - chicken soup. Not only is it comfort food of the highest order, experts say there is some real science behind the cure.

"When compared with 'pseudo soup' - a hot liquid that contains the same amount of proteins, sugars, carbohydrates, but not made from chicken - studies show chicken soup does have some mysterious healing properties over and above just being a hot, nutritious liquid. A study published in the journal Chest showed that chicken soup stopped the movement of neutrophils - white blood cells that stimulate the release of mucus.

Immediately following infection with a virus, the body moves large amounts of neutrophils to the site of the inflammation, causing a rush of symptoms that can range from a runny nose to severe chest congestion. Inhibiting that movement, say experts, may be one reason why chicken soup makes you feel better.

For the latest on flu jabs and cold remedies, visit the Cold & Flu Centre.