This has to be one of the most pathetic attempts to earn money I can imagine - ignoring all of the evidence and actually recommending smoking? That is bat!@#$ crazy.
Comparing the Risks
Let's look at the mortality rates. (I've limited myself to just the evidence in the UK, because that is where this <expletive> lives.)
70-75 thousand people in the UK with diabetes die every year... not of diabetes... with diabetes. [Source]
34 thousand people in the UK die of obesity. [Source] No doubt, there is overlap with the above figures.
Compare that to the 100 thousand people in the UK dying of smoking every year. [Source]
The whole idea of putting yourself at risk of smoking-related deaths to avoid obesity and diabetic mortality is in-f!@#ing-sane. Why not douse yourself in petrol and set fire to yourself to avoid the risk of frostbite?
Positive Correlation - Diabetes
Even that is assuming, of course, that smokers genuinely have reduced the risk of diabetes.
But that's not the case! For diabetes, the association goes the other way.
Results The search yielded 25 prospective cohort studies (N = 1.2 million participants) that reported 45 844 incident cases of diabetes during a study follow-up period ranging from 5 to 30 years. Of the 25 studies, 24 reported adjusted RRs greater than 1 (range for all studies, 0.82-3.74). The pooled adjusted RR was 1.44 (95% confidence interval [CI], 1.31-1.58). Results were consistent and statistically significant in all subgroups. The risk of diabetes was greater for heavy smokers (≥20 cigarettes/day; RR, 1.61; 95% CI, 1.43-1.80) than for lighter smokers (RR,1.29; 95% CI, 1.13-1.48) and lower for former smokers (RR, 1.23; 95% CI, 1.14-1.33) compared with active smokers, consistent with a dose-response phenomenon.
Conclusion Active smoking is associated with an increased risk of type 2 diabetes. Future research should attempt to establish whether this association is causal and to clarify its mechanisms.
Smokers are more likely to get diabetes. This idiotic risk reduction technique won't get you out of the frying pan into the fire - it will leave you in the frying pan and the fire!
Negative Correlation - Obesity
For obesity, I have to accept that there is an association between obesity and never smoking:
Overweight and obesity were more prevalent among never smokers than among current smokers in all occupational classes and among both never smokers and smokers in the lower occupational classes.
(Note: I couldn't find a measure of statistical significance of this anywhere - I expected it in Figure 1 or Table 2.)
Of course, this was the line in the study that the media, such as the BBC latched on to, even as they reminded people:
Prof Johan Mackenbach from the Erasmus Medical Centre in Rotterdam welcomed the study but added: "It is important not to forget that smoking is a much stronger risk factor for mortality than most other risk factors, including obesity."
In fact, the same data set supports the idea that any upside to be being smoker is outweighed by the downsides:
Conclusions Among both women and men, never smokers had much better survival rates than smokers in all social positions.
This crap hits a trigger button for me, and makes me angry. Giving people false information about life decisions that kill 100,000 people a year is obnoxious, callous and unethical.
Even if you assume the inverse relationship between obesity and smoking is causal, smoking to prevent obesity is putting you in a higher-risk category, and so is counter-productive.
Smoking to prevent diabetes is even more nuts. It doesn't reduce the risk, it is associated with a higher risk.
First, give up the cigarettes. Then, work on your weight. Then, work out how we can retain freedom of speech and yet get guys like this to shut up.