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If you're in the market for an
antioxidant to keep your body young and healthy, new research
suggests you'd be much better off with oranges than vitamin C
tablets. |
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Going
without such foods leads to DNA damage long before the iconic bleeding
gums of scurvy are seen.
But do
vitamin C pills on their own have the same protective effect as fruit?
Serena Guarnieri and a team of researchers in the Division of Human
Nutrition at the University of Milan, Italy, designed a simple
experiment to find out.
The
team gave test subjects a single glass of blood-orange juice,
vitamin-C-fortified water, or sugar water to drink.
The blood-orange juice and the fortified water had 150 milligrams of vitamin C each, whereas the sugar water had none. Blood samples were taken from the test subjects 3 hours and 24 hours after their drink.
Unsurprisingly, blood plasma vitamin C levels went up after drinking
both the juice and the fortified water.
The
blood samples were then exposed to hydrogen peroxide, a substance known
to cause DNA damage through oxidation.
The
damage was significantly less in the samples taken from volunteers who had
ingested orange juice, in both the samples collected 3 hours after consumption
and 24 hours after the drink. Unsurprisingly, the sugar water had no protective
effect. But neither did the vitamin-C-fortified water.
By
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