[mathgeek]

Do you have any sources for those claims? I'm sure many of us are, like me, trying to figure out which of all these conflicting claims are backed by science.

[PepeGomez]

https://www.ncbi.nlm.nih.gov/books/NBK222312/#ddd00333

http://www.who.int/water_sanitation_health/dwq/chemicals/cop...