*Oh brother.
http://www.newscientist.com/article/dn23347-what-we-exhale-is-unique-to-us–our-breathprint.html
(...)
"The team was interested in metabolites, compounds produced by the body's metabolism. The molecules are volatile and small enough to pass from the blood into airways via the alveoli in our lungs, so are present in our breath – albeit in miniscule amounts, sometimes less than one molecule per billion molecules of air.
"The team found that metabolites in individuals' breath remained "constant and clear", says Zenobi.
" "Our genomes are unique, our epigenomes are unique, our microbiomes are unique, so it is not surprising our breath metabolomes are also unique," says Jeremy Nicholson from Imperial College London, who was not part of the team. "What is important is how they vary from individual to individual..."
