Garlic

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Garlic
Good For You: Garlic helps protect your immune system by boosting production of infection-fighting white blood cells. In a British study, 70 people who took daily garlic supplements for 12 weeks came down with 24 colds, versus 65 colds in a placebo group of 72 people. Allicin, garlic's main active component, is thought to block enzymes that lead to viral infections.

Tastes Great, Too: Try Sercarz's tip of drizzling a head of garlic with olive oil, roasting it, then squeezing and spreading the cloves on crostini or sandwiches.
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