So first of all, which chemicals? I focused on a class of chemicals called phthalates. And these are chemicals, a pretty big class, that make plastics soft and flexible, also present in cosmetics and personal care products, room fresheners, and anything fragranced.
These chemicals have the ability to lower testosterone. And I did a series of studies to look for it in humans. Other chemicals involved that are important is Bisphenol A, the bisphenols, which are estrogenic and also interfere with reproduction and your development and lots of things in our bodies.
And then there are other classes of chemicals, chemicals in pesticides and flame retardants in pithos. And basically these are things in all of our lives all of the time.