Posts Tagged ‘metabolism’

The Proceedings of the National Academy of Sciences report today that vitamin C and vitamin E supplements may counteract the beneficial affects of exercise on diabetes and glucose metabolism. The University of Jena and Harvard University study shows that exercise induces bursts of free radicals that cause our body to activate and metabolize carbohydrates more efficiently, which can prevent type 2 diabetes and other conditions that may lead to stroke, coronary artery disease and kidney failure. Mitigating these free radicals with antioxidant vitamins could, therefore, block the health effects conferred by exercise.

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A new study is challenging the notion that the human brain uses only glucose as its sole energy source. Researchers in Denmark and The Netherlands have found that during strenuous exercise the brain is able to metabolize lactate, a byproduct of metabolism. In addition they discovered that the brain can actually shift into a higher gear of activity. This may explain why the brain continues to function well even during times of high energy demand for the body.

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Researchers at the University of California, Irvine have discovered a protein that senses energy usage in our cells. This protein, called SRT1, works in concert with a circadian rhythm protein called CLOCK to regulate our cells’ activities. When the balance between these proteins is disrupted, say by poor sleep or diet patterns, normal cell functions can become upset in the process. This discovery of a link between a protein involved in cell metabolism and one involved in circadian rhythms demonstrates how sleep disturbance can lead to metabolic problems such as obesity, diabetes, and even accelerated aging. Full Story.

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