If you exercise to improve your metabolism and prevent diabetes, you may want to avoid antioxidants like vitamins C and E.
>> The original study can be found at PNAS
That is the message of a surprising new look at the body’s reaction to exercise, reported on Monday by researchers in Germany and Boston.
Exercise is known to have many beneficial effects on health, including on the body’s sensitivity to insulin. “Get more exercise” is often among the first recommendations given by doctors to people at risk of diabetes.
But exercise makes the muscle cells metabolize glucose, by …

Folic acid is one of those great public health success stories. In the decade that followed the fortification of cereal grains and other foods, along with educational campaigns, the rate of certain birth defects dropped dramatically. 
As studies beginning in the 1980s started showing that folic acid could also help prevent some cancers, it started to seem like a wonder-vitamin. Now, however, folic acid’s heyday may be over. New studies suggest that getting too much folic acid might fuel certain cancers in some people. 
And with the vitamin showing up in ready-to-eat cereals, bread, snack …