It is true that smoking can sometimes increase metabolism enough to affect weight. Or maybe it just makes the food so tasteless that you eat less. Who knows? That's a long way from making it healthy.

Also, before you light up to try to prevent dementia you should remember that there are also kinds of dementia (for example, dementia due to multiple strokes) that are more likely in smokers.

The article was at least good for a few laughs. Most of the science was presented from a less than complete perspective.