Alcohol has an energy content of 7 kcal/g of pure alcohol. However, there was no clear statistical correlation between alcohol consumption and body mass index in transversal as well as in longitudinal studies. This is related to the fact that alcohol stimulates NADPH oxidation, from NADH. Now, this is the couple NADH-ATP which produces energy, and thermogenesis. Thus alcohol is consumed more than it is stored. Futhermore, alcohol increases vasoactive processes (vasodilatation) and catecholamine secretion. Thus, resting energy expenditure and diet-induced thermogenesis increase.
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