Thank you all. My concern is that I may have a sensitivity to e-liquids. I will say that my worst experiences have a lot to do with the burning sensation when trying a new component. I have encountered harshness on a mega level in which my lips, mouth lining and throat feel like i am inhaling acidic liquid. I have found some very mild vapes and after a harsh episode, even these contribute to indigestion. I am careful to use very moderate settings with my Provari and have paid close attention to voltage/resistance parameters setting up my voltage in relationship to the resistance. I am still new to this, but the bewildering issue from my POV is why would a manufacturer allow products out that produce harsh vapor in the first place? Again thank you all for responding, all information is helpful.