As to the hepatic toxin removal it depends on the ability of the detoxification system to extract albumin bound toxins by means of adsorption. The adsorption consists in the consolidation on the surface of a solid material of molecules floating in a fluid after matching the fluid with the solid. The consolidation is due to weak bounds as in the case of Van der Waals and hydrophobic bounds. The selectivity of adsorption occurs when albumin molecules easily pass throughout the sorbent while the sorbent draw the albumin carried toxins into the pores of the sorbent. The hepatic toxins often are hydrophobic and with molecular weight < 1,000 daltons (bilirubin = 406 daltons, cholic acid = 283 daltons, chenodeoxycholic acid = 272 daltons). The albumin structure consists in 3 domains, which allows a multi-binding protein transport. As to bilirubin, its protein binding is a physiological protective mechanism to prevent the free bilirubin diffusion and toxicity in human tissues. The amount of bilirubin production is about 300 gr/day. The molecule most tightly bound to albumin is non-conjugated bilirubin: the amount of non-conjugated bilirubin not bound to albumin is < 0.1%. Non-conjugated bilirubin is currently considered as "indirect" bilirubin because it gives an indirect reaction with standard diazo reagents. Conjugated bilirubin is also bound to albumin but with a reduced affinity. The albumin-bilirubin bond occurs by means of covalent or non-covalent strengths. The 2 bilirubin binding sites on albumin show different constant of association (Ka). The primary site has a high affinity, its Ka is 55-68 micromol/L and it can bind only 1 mole of bilirubin. The secondary site has a low affinity, its Ka is 4.4-5.0 micromol/L and it can bind more than 1 mole of bilirubin. A gap between 20 and 50 ångström between albumin and the sorbent is needed to move bilirubin from albumin to the sorbent.