The liver and the so-called absorption deficiency. A hypothesis (author's transl)]

The blood supply of the liver consists of about 25 per cent from the hepatic artery and 75 per cent from the portal vein. Therefore, especially in the phase of absorption, considerably more alcohol comes from the portal vein into the liver than from the hepatic artery. As the alcohol in the liver is always partially metabolised, all the alcohol that is absorbed in the gastrointestinal tract can never appear in the general and pulmonary circulation. Perhaps this is the essential reason for the so-called absorption deficiency.