Some chemicals have socioeconomic significance: nicotine is associated more with rural populations and caffeine consumption correlates with education levels
what you eat, the saying goes. It therefore follows that what you excrete gives away a lot about you. Writ large, that information might yield useful demographic clues about particular neighbourhoods. This, at least, is the thinking behind a study by Saer Samanipour of the University of Amsterdam, in the Netherlands. Dr Samanipour has been analysing sewage, and has shown that it gives a pretty good profile of an area’s population.
In total, the team looked at the concentrations of six legal recreational drugs, caffeine and nicotine among them, two illegal recreational drugs , seven opioids , eight antidepressants and antipsychotics, nine other pharmaceuticals, two artificial sweeteners and six markers of diet, such as enterolactone, a substance that shows how much fibre people are consuming.
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