In Scientology, a rundown designates a series of related actions which culminate in a specific end result. Developed solely to handle the biochemical barrier to spiritual gain, the Purification Rundown is a carefully designed combination of exercise, vitamins, nutrition and sauna use which dislodges drug residues and other toxins from the fatty tissues so that these substances can then be eliminated from the body. A person undergoing this program is closely monitored by specially trained personnel in liaison with medical doctors to ensure that each aspect of the program is administered correctly and the desired benefits are attained.
Once the person has been freed from the harmful effects of these drug residues and other toxins, he is in a far better position to improve as a spiritual being, to which many thousands of people have attested.