If too many painkillers are used, the body treats the injury as less of a priority. I seldom need or use painkillers, and I heal pretty quickly, too.
I'm like you, I'm not inclined to use painkillers very much either.
I have a problem with the claims in these studies using nicotine from smoking.........is there a different form of nicotine in tobacco that can be differentiated in the body from other sources of nicotine?