VOA慢速听力(018)

Recent studies have provided new information about tow popular vitamins and their effects on the heart.

　　A study in the British medical publication The Lancet says vitamin C may reduce high blood pressure. Scientists from Boston University in Massachusetts and Oregon State University studied about forty people whose blood pressure was higher than normal. All the people continued to take their normal blood pressure medicines during the test period. Half of the people also took five hundred milligrams of vitamin C each day. The other half took an inactive substance.

　　After one month, the blood pressure of the people taking vitamin C was reduced by about nine percent.