Alcohol or ethanol is a commonly consumed beverage. when alcohol is taken it is absorbed along the whole length of the digestive tract, rapidly from the that is 20% from stomach and most rapidly that is 80 %from the small intestine. The rate of absorption is influenced by the volume ingested, the concentration and the nature of the alcoholic drink and presence of food in the stomach.
Alcohol provides energy and produces 29.3 kJ/g (8 kcal/g), but many alcoholic drinks also contain sugar, which increases their calorific value results in an increase of blood sugar level. For example, one pint of beer provides 1045 kJ (250 kcal).
Nevertheless the oxidation of a large quantities of alcohol effect on the metabolism of other compounds. There is interference with carbohydrate metabolism, with inhibition of glycolysis (formation of glucose from glycogen which is a storage compound) and gluconeogenesis (formation of glucose from other substances other than glycogen like fatty acids, amino acids), resulting lowering of blood sugar level in long run.