Drinking beer is not absolutely able to lower blood sugar, and the blood sugar value will rise and then fall after people drink beer. First, after drinking beer, the maltose in beer will be rapidly absorbed into the blood and decomposed into monosaccharide and absorbed by the body, usually within half an hour of drinking, it will lead to a rapid increase in blood sugar and quickly reach the peak concentration, which will then stimulate the secretion of insulin in the body, and after the secretion of a large amount of insulin in the body, it will make the blood sugar drop significantly and a transient hypoglycemic reaction will occur. Secondly, after drinking alcohol, the ethanol in alcohol will be rapidly absorbed into the liver and decomposed into acetaldehyde by the action of ethanol dehydrogenase in the liver, which is the process of consuming heat and energy, releasing lactic acid and consuming ATP and heat in large quantities, which will accelerate the decomposition of blood sugar.