Thank you Mr. Mann for the link and also for your comments. The decision on how much of a substance to use is entirely up to the individual, as long as they are well informed and understand the indications/consequences. I love my vape, but you are correct, I can not vape more even if the nic was safe. Doesn't go with my system. But I do love the yummy flavors. I am like a kid in a candy store whenever I browse the flavors.
I completely understand being stim sensitive (if that is in fact what you are alluding to), as I have people in my family that are (mostly based on caffeine). Heart palpitations, uneasiness, raciness and other not-so pleasant effects can be felt by many people when taking stimulants. I also understand that a lot of times in this (and any) community, those that speak contrary to others' experiences get met with a lot of resistance. However, that resistance is understandable and justified when the personal experiences are talked about as universal facts as opposed to individual (not saying that is necessarily what you did).
I am a high nic vaper (as high as 36 mg sometimes), but if I said that when I vape that high I was also going to go do some strenuous activity I'd be lying. Yesterday when I had snow to shovel, I did
not vape prior. Why? Because for me it would've messed with my overall endurance rather acutely (based on experiences I've had prior). I vaped afterward, but not before. I have come to learn when the best time for me to vape is, how much to vape in day, and when I shouldn't vape at all. If I just want to vape for the sake of it, I'll vape some straight VG or something like that; but the problem for me is that when I am vaping more for sport (like zero - 12 mg), my consumption goes up so high that even my normal two liters to a gallon of water a day isn't enough to stave off dehydration (and then muscle aches). I am one that overall does not jive well with a lot of the PG/VG intake. So for me, the higher the nic the less I need to vape--I now average about 1.5 mL a day (if that). Once again, it's a personal thing for me and no amount of "evidence" anyone can link to about why this or that isn't the case means much to my experience. But, once again, that goes the same for my experiences not meaning much to anyone else unless they feel as I do.