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Alcohol dilates peripheral blood vessels, but has been known to actually. constrict some blood vessels in the brain, lowering the oxygen content. Alcohol dilates peripheral blood vessels, but has been known to actually  constrict some blood vessels in the brain, lowering the oxygen content.
Food slows down alcohol absorption because your blood has a smorgasbord of ions to select from and does not selectively choose alcohol over other fuel. So your blood is nourished by food and alcohol both.This makes your BAC lower because not as much alcohol can enter your bloodstream as quick because the alcohol has to compete with the food to enter your bloodstream. So if you eat enough, it will slow down the alcohol absorption.ood slows down alcohol absorption because your blood has a smorgasbord of ions to select from and does not selectively choose alcohol over other fuel. So your blood is nourished by food and alcohol both.