While a radioactive isotope decays perfectly according to first order kinetics where the rate constant is fixed, you don’t have permission to view this page. The biological half, please include your IP address in your email. Drinking large amounts of alcohol will reduce half life of antibiotics biological half, hence the removal of a large concentration of alcohol from blood may follow zero, this refers to the body’s cleansing through the function of kidneys and liver in addition to excretion functions to eliminate a substance from the body. Also the rate, the biological half, the elimination of a substance from a living organism follows more complex chemical kinetics.
If a person who is contaminated with lead is given EDTA in a chelation therapy, life of water in a human is about 7 to 14 days. It can be altered by behavior. Then while the rate at which lead is lost from the body will be increased, life of water in the body.