It's molar concentration, the study doesn't really mention it directly of course. 1mM is probably high since they're looking at what concentration of tobacco ca

It's molar concentration, the study doesn't really mention it directly of course. 1mM is probably high since they're looking at what concentration of tobacco causes DNA damage in e.g., a cavity, but the study doesn't think it's unreasonable. Other studies in animals used up to 4mM. The full study can be found as the first article in this pdf: http://tobacco.cleartheair.org.hk/wp-content/uploads/2018/01/Nicotine-genotoxicity-mutation.pdf http://tobacco.cleartheair.org.hk/wp-content/uploads/2018/01...