Natural Defenses  Stay healthy with these top immune-boosting
foods.  February 18, 2009  Eat: Onion  What For: This versatile
veggie is high in quercetin, a powerful antioxidant known for
its antiviral properties. In studies with runners and other
athletes, scientists from Appalachian State in North Carolina
have shown that daily doses of quercetin can reduce viral
infections as well as inflammatory response to heavy exercise.
Drink: Green Tea  What For: EGCG, abundant in green tea, is one
of the most powerful antioxidants found in plants. This compound
protects a variety of cells from being weakened and shields them
from potential harm caused by not–so–nice invaders.  Eat:
Turmeric  What For: Often used in Indian cuisine, this spice
gives curries and other dishes a golden color. It's also
commonly used in Chinese medicine. Curcumin, the antioxidant in
turmeric that gives it its rich hue, can help your immune cells
bounce back faster after you get sick.  Eat: Oysters  What For:
Oysters are packed with zinc,