Human exposure to environmental toxic compounds of very different origin is a well known and well documented fact, which is in the media with a daily frequency. In spite of this, the association between exposure and effect on health has not always been established with the depth that we believe is necessary.
In fact, in the last two decades new data have appeared in the specialized scientific literature that relate the exposure to certain chemical compounds, introduced into the environment by human activity and known as endocrine disruptors, with the emergence of new syndromes and development of specific diseases, of cause not well known, but that imply a disruption of the hormonal balance. Concern about the increasing incidence of this type of alterations has attracted the attention of clinicians and researchers trying to formulate, with greater or lesser success, new conceptual approaches in the etiology of the disease and endocrine disruption.
Diseases of increasing frequency such as infertility, hypothyroidism, obesity and diabetes and hormone-dependent cancer, such as breast cancer, have found in the environmental hypothesis a new explanation that deserves to be explored. While this occurs, caution should be used and the precautionary principle applied, according to which it is mandatory to anticipate damage avoiding exposure, even if the causal associations have not been fully established