''It's actually the nicotine itself that inhibits bone healing,'' said Dr. Alan S. Hilibrand of Thomas Jefferson University and the Rothman Institute in Philadelphia. And nicotine, he said, does not linger long in the body.
Here is the link for the whole article :VITAL SIGNS - CONSEQUENCES - VITAL SIGNS - CONSEQUENCES - Warning - Nicotine Can Inhibit Healing - NYTimes.com
Not good enough to convince me, sorry!
Dr. Hilibrand doesn't address how or how much nicotine inhibits bone healing (or at least the author neglected to include it). He states that "nicotine does not linger long in the body" -- what is long? Some sources I've read online state that it varies depending on amount ingested/inhaled/absorbed and on length of time nicotine has been used overall -- tests can show negative from 6 to 8 hours from last use and can show positive from use for up to 30 days after cessation.
Also too many variables not addressed other than smoker / non-smoker. How many people were obese? How many people nutritionally deficient? What are the ages of the 190 patients monitored? What other underlying disease processes did these folks have -- diabetes, heart issues, kidney issues, liver problems, COPD (which can be caused by things other than smoking, just sayin'), etc...? Not a good model for the scientific method.
But, as I haven't really researched anything regarding nicotine and bone-healing, I'll have to assume that he has his medical justifications for saying what he did and that the NYT reporter just did a half-a## job with the article as it was more intended for the general public (and, prolly, the anti-smoking nazis) than for being published in a medical journal.
The doctors I worked for/around always told me that the majority of smokers who suffer from reflux do so due to the nicotine in cigs. They never showed me any documented evidence. I always believed them until I switched from smoking to vaping. Still have nicotine input (maybe more than before, considering the amount I vape), and I haven't had reflux problems once since switching over. Just a personal anecdote, no scientific evidence, but several people whom I know and have switched have noticed the same thing.
I still think nicotine gets a bad rap -- sometimes deservedly so, sometimes not. But it is the medical communities' catch-all bad guy for the ills of smoking beyond what it physically does to your lungs and the transient vaso-constrictive properties it has akin to caffeine.
I know, I am one of those peeps "in the medical community" and I hear it all the time, LOL!