ABSTRACT
Since September 8, 2009, 50 million chemical substances have been registered with the Chemical Abstracts Service (CAS), which is a part of the American Chemical Society. The CAS registers 3.000 new substances daily. Although these represent only registered chemical substances, in modern life a person is confronted with 80.000 chemicals in his or her daily life. A growing number of people are not able to tolerate this amount of chemicals and develop allergies and multiple chemical sensitivity (MCS), which can occur suddenly (high dose initiated) or after exposure to small amounts of chemicals, drugs, odors, and so forth over a long time (low dose initiated).
