Monday, August 10, 2009
Fruit of the Week: GRAPES
Recent studies show that the flavonoids, such as resveratrol, found in grapes, particularly purple and red grapes, have powerful health-promoting properties. Much of this research was motivated by what has come to be known as the French Paradox: the interesting phenomenon of the low incidence of heart disease among the French despite their eating a diet high in fats. Increasing evidence suggests that the flavonoids found in grapes, grape juice and red wine, particularly resveratrol, may be a key to understanding this paradox since these foods are an important part of the French diet. Like calorie restriction, resveratrol activates a number of sirtuins, genes in the SIR (silent information regulator) family, which trigger cell signaling that:
- mobilizes the release of stored fat and its conversion into glucose
- promotes insulin secretion, so glucose is promptly delivered to cells
- boosts the aerobic capacity of the mitochondria (the energy production factories in our cells), so the glucose is efficiently converted into energy
- inactivates p53, a gene that plays a pivotal role in cellular senescence
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Labels: antioxidant, flavonoids, French Paradox, fruit, grapes, healthy diet, healthy food, resveratrol
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