Neuro XPF™ manufactures its vape / drip product with ISOTERP™ CBD oil bonded to glycerin, using absolutely NO propylene glycol. This special process unleashes the flavonoids and terpenes of Neuro Armour’ s Vape / Drip. Without question, Neuro Armour™ is the best tasting and most bio-available / fastest acting vape product in the industry