I have been vaping for several months now, usually low nicotine (around 6 mg and 3 mg) but just recently ive decided to make the switch to 0 nic. I don't know if it is just the brands that i have tried but I have been getting unpleasant side effects that i didn't notice with the low nic juices and i am unsure what is causing it. Mostly it makes it hard to think, almost like a lightheadedness but not quite. Do you think this is the pg in the liquid and i just wasn't noticing it before because the nicotine was masking it? what im vaping right now is the brand "diamond liquid" and i believe the vg/pg ratio is 75/25. I will be trying 0 nicotine vg purity juice from heather's heavenly vapors soon and i am hoping i dont get these effects, otherwise i may have to consider quitting entirely which i dont really want to do. One other thing to note is that i have tried 0 nicotine in the past with another brand and i noticed the same effects. Has anybody else experienced this? what are your thoughts?