The way I see it is...I smoked from age 8 to age 52. The cigs have probably already killed me, vaping is just lengthening my life. vaping works for me. I vape in the 20-30w range and use very few juices that contain questionable ingredients, and then at very low percentages. I choose to not worry about it. I'm in a good place with my vaping. Would like to figure out how to use tc on my Therion's tho. That journey is not going well.