biomonitoring

noun

bio·​mon·​i·​tor·​ing -ˈmä-nə-t(ə-)riŋ 

1

: measurement of the amount of chemicals (such as toxins) in the human body

But although biomonitoring can provide reams of statistics about the chemicals people are exposed to, it can't necessarily indicate whether such exposures are likely to make them sick.

—Erik Stokstad, Science

2

: the use of living organisms to assess environmental conditions