As a trader and also on Stock Twits I have noted that there is an organized contingent of liberals that have been bad-mouthing oil and short selling as hard as they can to drive down the price. The new Robin Hood phone app. was designed, it seems, for libs to use for the purpose of the destruction of our oil, gas and automotive industry because of 'muh Climate Change' as well as to make "Drumph" look bad. BOOMERANG.
It doesn't appear as if they are terribly concerned if they get burned in the squeeze, they just want to drive the price down as hard as they can without remorse. These people are sick.
I read on muh Wikipedia that FDA has set a limit of 83mg/liter. Of course what you do at home is up to you.