9 Top Healing Foods
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Heart-healthy onions thin the blood and raise "good" HDL cholesterol. flavonoids—the phytonutrients that give yellow and brown onions their color—help prevent chemical changes that increase the tendency of harmful LDL cholesterol to accumulate in the arteries. One flavonoid, quercetin, has anticancer properties, and fights viral and bacterial infections. Also, onions are useful in treating asthma because they reduce constriction of the bronchial passageways.