[Happyme]

Thanks Sweet Orange.
I tried to look up Lotus's scientific skin absorption posts but it just didnt happen.
There is one journal entry:
https://www.scopus.com/record/display.uri?eid=2-s2.0-0034098046&origin=inward&txGid=1dd173f7e3b8585f44e23ab9f1d2e1fc

That explains the Dalton 500 rule.
The trick is finding out if the stuff you are interesting is less than 500.
Bobbi