The antioxidants found in kiwifruit are absorbed by the body more effectively than
those from other antioxidant-rich fruits, according to a study conducted by researchers
from the U.S. Department of Agriculture's Arkansas Children's Nutrition Center in Little
Rock, and published in the Journal of the American College of Nutrition.
Researchers fed 300 grams per day of green Hayward kiwifruit to seven healthy women
volunteers who had fasted overnight before the beginning of the study. The researchers
took blood samples from the women before they ate, as well as 1.5, 3 and 4.5 hours
afterward. They measured the antioxidant
capacity of each blood sample, then exposed the blood cells to hydrogen peroxide and
recorded the degree of oxidative damage suffered.
The researchers found that kiwifruit had an antioxidant intake score of 12.5,
substantially higher than the known score of 4.2 for grapes and 1.7 for strawberries. This
means that eating kiwifruit resulted in the highest absorption and metabolism of antioxidants.
The mechanisms behind the differences in antioxidant absorption from different fruits are
still unknown, although the researchers speculated that kiwifruit's high vitamin C content
might be partially responsible.
Antioxidants are believed to be important for their ability to remove free radicals from the body. Free
radicals have been linked to various kinds of cell damage, including some that cause
cardiovascular disease, cancer,
dementia and various symptoms of aging.
"We're learning that anti-oxidants should be consumed with every meal," lead
researcher Ronald Prior said, "and if you routinely skip anti-oxidants in your diet,
over time, the excess number of free radicals being produced may begin damaging cellular
components, ultimately leading to atherosclerosis and cancer."
The researchers noted that while it can not be proven that eating kiwifruit will have any
specific health effects until more
studies are carried out, the antioxidants in the fruit are known to lower rates of heart
disease and cancer.
Sources for this story include: www.upi.com.
(naturalnews, 11.24.2008, David
Gutierrez) http://www.naturalnews.com/z024895.html