Relative absorption coefficient (RAC) is an indicator that is used to assess the efficiency of absorption of substances from the digestive tract into the blood. It is defined as the ratio of the concentration of a substance in the blood to the concentration of that substance in a food or drug.
To determine the CVO, radioactive isotopes are used, which are introduced into the human body along with food or medicine. Then, after a certain time after taking food or medicine, a blood test is performed to determine the content of radioactive isotopes. If the concentration of a radioactive isotope in the blood is higher than in food or medicine, this means that the substance is well absorbed into the blood and effectively absorbed by the body.
The relative absorption coefficient can be used to evaluate the effectiveness of various medications, dietary supplements, and other substances that may affect the absorption of other substances in the body. It may also be useful in diagnosing certain malabsorption diseases.
However, it should be noted that the relative absorption coefficient is not an accurate indicator of the efficiency of absorption of substances and cannot completely replace clinical studies and tests. In addition, the use of radioactive isotopes may have some risks to human health, so all precautions must be taken when conducting such research.