Protecting the heart, warding off cancer, easing the pain of arthritis -- the list of Vita

min E's possible benefits keeps getting longer. Now, because of two new studies, some researchers say the nutrient is so critical for older people that everyone over 65 should consider taking a daily supplement.

The latest finding comes from nutrition and immunology respected: Vitamin E boosts the immune system in older people. In an eight-month study of 88 seniors, the scientists found that those taking at least 200 international units of Vitamin E daily had stronger immune responses than those taking little or none. Alzheimer's disease. Researchers tracked 341 moderately senile patients. Those who popped 2,000 IU of Vitamin E took seven months longer to reach an advanced stage of the disease.

Rangit Kumar Chandra, a Vitamin E researcher at Memorial University of Newfoundland, Canada, says more studies are needed to learn who can benefit most and at what dose. Vitamin E thins the blood, so high doses can cause bleeding in people who also take blood thinning drags, even aspirin. Individuals with serious conditions should consult their doctors. But most people over 65, Chandra says, can take up to 200 IU with no side effects and great benefits.

What's the main idea of the passage？

A．People will be in perfect health if they take Vitamin E every day.

B．Study showed that people who took Vitamin E regained their Flexibility.

C．Vitamin E may help prevent Alzheimer's.

D．Vitamin E offers a range of advantage if old people take proper dose of Vitamin E every day.