The first thing we learned is the exposome is vast. There were more than 2,000 species, from bacteria to my pet guinea pig, registered during my own two years of profiling. Even the guy or gal who wore it for three months for the study was exposed to over 1,000 species. There were close to 3,000 chemical features detected in the whole study. Second is that the exposome is dynamic. It varies a lot. How much of the variation is regional or seasonal? For the part we could figure out, location is the number one factor, especially for the chemicals.