The prestigious scientific journal Nature draws
considerable attention to its articles from scientists and others worldwide. That makes it imperative that we point out
the many serious flaws in a recent article, misleadingly
titled, “Is nicotine bad for long-term health? Scientists aren’t sure yet.”
At this writing, MEDLINE, “the world's leading bibliographic
source for biomedical scholarly literature and research,” offers citations to 28,241
articles with the keyword “nicotine”. While
it is true that science always demands additional research, one can reasonably
assume that there is sufficient data on nicotine effects to draw meaningful
conclusions about its safety.
Apparently, the authors of the Nature article went to
great lengths to secure comments from what is surely a minuscule community of
“unsure” scientists and from entrenched opponents of recreational nicotine
consumption and tobacco harm reduction.
Aruni Bhatnagar, who runs a tobacco regulation and addiction
center sponsored by the American Heart Association, is quoted saying, “We believe
that much of the cardiovascular effects of smoking are because of nicotine,”
and he postulates that the drug can change the timing of electrical signals in
the heart. This sounds ominous, but the
article includes a refutation of these comments by Neal Benowitz, a recognized nicotine
authority: “Nicotine is a minor player with respect to smoking-induced
cardiovascular disease.” Benowitz points
to “studies of snus – a chewable tobacco product that is popular mainly among
men in Sweden and is gaining traction elsewhere – which do not generally show a
detectable rise in heart problems among people who use it.”
Maciej Goniewicz of the Roswell Park Cancer Center in
Buffalo offers insignificant insights, such as, “[Nicotine] changes lots of functions
in our bodies, it’s not a harmless compound.”
That can be said of everything humans consume. Goniewicz also muses, “Someone chronically
exposed to nicotine might have chronic inflammation. There is speculation
that it might contribute to increased risk of cancer. [Emphasis added]
From animal and cell studies, yes, nicotine is doing something. How this
translates into a risk for the [human] user, we don’t know.” Benowitz counters: “the evidence, for me, is
not convincing in tying [nicotine] to cancer in humans.” The evidence for a nicotine-cancer link is
next to nil.
Frequent nicotine critic Laura Crotty-Alexander of the
University of California San Diego notes, “We’ve underplayed the role that
nicotine has in the health effects of tobacco products.” Basing her opinion on her own research, in which
cells and animals are tortured with nicotine (more info here
and here),
she offers a weak indictment of the drug, saying, “I’ve been more and more
surprised at the changes I’m seeing when I expose cells to nicotine.”
One of the most extreme views in the Nature article comes
from Kjersti Aagaard, a maternal-fetal doctor at Houston’s Baylor College of
Medicine: “No amount of nicotine is known to be safe in pregnancy. None. If you
are exposed to nicotine in the womb, there could be lifelong
consequences.” Aargaard implies that
failure to meet that standard could have criminal consequences for the pregnant
woman, but the journal contrasts those remarks with the position of the UK
National Health Service, which “describes e-cigarettes as safer than smoking
for pregnant women, but it notes that there is little research to support the
safety of e-cigarettes beyond that. It recommends pregnant women use nicotine
patches and gums to stop smoking.” This
is but one example of the startling differences between prohibitionist American
and science-based British positions on vaping.
Despite the Nature article’s complaint that “the lack
of knowledge about whether nicotine contributes to the damaging health effects
of smoking is becoming more worrying,” there is a wealth of knowledge supporting
the finding that the effects of nicotine on health are minimal to
nonexistent.