In toxicological risk assessments, the potency of a chemical is viewed alon
g with possible exposure scenarios for humans. In the case of endocrine mod
ulators ("endocrine disrupters") this is difficult because of the presence
of hormonally active compounds of natural origin in food and of the endogen
ous hormone production. Comparisons of exposure scenarios for individual in
dustrial compounds representing potential "endocrine disrupters", and for e
ndocrine modulators of natural origin, under consideration of their relativ
e potencies, could lend to new definitions of "margins of safety" for such
compounds.