9 of 21

Tea

Everyone knows a steaming hot cup of tea can help break up chest congestion and soothe a sore throat, but the benefits may run deeper.

All tea—black, green, or white—contains a group of antioxidants known as catechins, which may have flu-fighting properties. In a 2011 Japanese study, people who took catechin capsules for five months had 75% lower odds of catching the flu than people taking a placebo.

Need another reason to turn on the kettle? Other research suggests catechins may help boost overall immunity, rev metabolism, and protect against cancer and heart disease.

Next: Red peppers