The glycerin you posted is vg(vegetal) and food-grade and dosen't state if usp or not. Many times food grade is just as pure as EP/USP, but as a rule, we generally only use usp/ep grade ingredients for vg, pg and nic. Yes, pink-mule's vg is very good, thick and good taste, no added water, is EP/USP and btw, made by a spanish 100 years old family company, productos express(or ceras expres). Btw, pink-mule is not UK based, but a danish company(founded by) located in spain and with very good reputation for support and quality...