It is rumored that people who smoke do not get dementia. Looks like someone misunderstood something. Smoking itself increases the risk of dementia, but nicotine in some cases somehow reduces the risk.
The smokers immediately rubbed their hands together. In fact, the studies that found the beneficial effects of nicotine were sponsored by the tobacco industry. Well, the quality of these studies was appropriate.
Something similar has already been tried to depict in relation to smoking. Well, that is, smoking and nicotine are not the same thing.
So, there used to be a story that smokers are less likely to get dementia. However, later it turned out that these people simply do not live to see their dementia. And so everything was logical - as long as they lived and smoked, they did not have dementia.
And about the same there was another reason. If a person smoked all his life, lived for a long time and did not develop dementia, this was often associated with the general level of health. That is, if he withstood this tobacco for 90 years, then dementia did not have time to undermine his brain during this time. Grandfather turned out to be tough. Or grandma.
Another interesting trick was associated with smokers who already had dementia. They were still relatively intact and independent. But it turned out that when asked about smoking, these people underestimated the number of cigarettes smoked. It turned out that a person of the type almost did not smoke at all, but already had dementia. In fact, these people, precisely because of their dementia, forgot the number of cigarettes they smoked. The error came out.
Briefly speaking
Smoking increases the risk of developing dementia by 30-50%.
If nicotine entered the blood of people without tobacco, then maybe it is somehow beneficial and would affect the risk of developing dementia. If I hadn't hurt my heart. Disappointment again ...
