14 December 2012

Why fruits and vegetables help prevent cancers?

Fruit and vegetables are rich in flavonoids, which can protect against some cancers.

A research study found that amongst female respondents, those who had eaten flavonoids more than 580 milligrams daily can reduce the chance of suffering from gastric cancer by half compared with those who consumed less amount. This is because flavonoids contain quercetin which helps suppress chemical reaction of carcinogen (a substance that is capable of causing cancers) .

Flavonoids are a powerful antioxidant. Their antioxidant effect is two times as that of vitamin C, five times of vitamin E. They have smaller molecular structure, are water soluble and so they can easily be absorbed by the body.

In addition to the prevention of cancers, flavonoids have a lot of other benefits:
They reduce, promote healthy arteries and help fight aging by preventing and repairing cellular damage. And so they can reduce the formation of atherosclerosis, help prevent other cardiovascular diseases and reduce inflammation.

As they are also an important element in maintaining the health of brain cells, flavonoids may also protect against dementia and Alzheimer’s disease.
The list below is the foods rich in flavonoids:
  • Apples (in the skin)
  • Blueberries
  • Broccoli
  • Cabbage
  • Capers
  • Chocolate (dark, not milk) and cocoa
  • Onions
  • Strawberries
  • Red grapes
  • Red wine
  • Tea (all kinds)
Besides, flavonoids also exist in nuts, legumes and seeds (such as sunflower seed, flax seed).

In addition, we should eat more foods containing vitamin E as well because these can help flavonoids fight free radicals, reducing probability of suffering from cancers.

And if eat together with foods rich in vitamin C, such as citrus fruit , kiwi and strawberry, it can effectively improve the elasticity of blood vessels. inhibit platelet from clotting, reduce the risk of infarction, hypertension, diabetes, stroke, elderly degradation, etc. Another study found that a combination of vitamin C and flavonoids (100 mg each) can help speed up the healing of herpes virus such as lip rash.

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