HI,
I buy the Stevia Supreme. Comes in a large spice type bottle.
Its a white almost powder. Haven't seen the green stuff....
I don't notice any after taste with mine...I know that some people
don't realize you need VERY little to sweeten ...not like some sugar subs. I also don't experience any side effects....headaches
etc.....
Oh the stuff I get is by Stevia Co. out of TX.
greentea