May is an important word though. I would get scared if we thought that they DO lead to the concentration levels that they studied (and even then, I would like to see some pharmacokinetics data to learn how LONG the compounds stick around in the body, if they get destroyed really fast then its probably not an issue either as the concentration will drop out of a harmful range before any damage can be done). A lot of things may happen, this is just evidence for a definite need of further study.