I'm a pretty dedicated coffee drinker, and old enough that people used to give me dire warnings about my actually pretty moderate 3-4 cup a day habit. "It'll rot your insides," they'd say, with a conviction almost like religious fervor. I have no idea what it would even mean for coffee to "rot my insides," so I didn't pay much attention to them.
People seem to love minding my business, for reasons I have never completely understood- in fact, the people who are most prone to minding my business tend to be the people I pay the least attention to. They could shoot ...... in front of me and I probably wouldn't notice, but they seem to monitor my coffee-consumption with Minority Report-like precision. I find that a bit creepy, tbh.
Fast-forward 20 years, and studies are coming out that indicate that coffee drinkers have _substantially_ lower all-cause mortality than non-coffee drinkers. I don't want to read too much into this, because there are a lot of possible confounding factors, but...
This actually makes some sense to me. Everyone is obsessed with anti-oxidants these days, buying up Acai berries like they're precious little gold nuggets the Dalai Lama pooped. I think the jury is still out on the subject of anti-oxidants, but... A single cup of coffee has more anti-oxidants in it than even the most fervent Acai berry consumer would get in a year of subsisting entirely on Acai berries. In fact, that cup of coffee probably has more anti-oxidants than any non-coffee drinker could feasibly consume in a year from all other available sources. And we know, pretty surely I think, that coffee is at the least hepato-protective. Given how much I like to drink... well, I'm probably still here because of coffee.
I would not be at all surprised to find that vaping is not just 95% safer than smoking, but 105% safer. Nicotine is a wonder drug, and I'm inclined to suspect that vaping is healthier than not vaping. There are some reasons to think this might be true, but... I do not think it would further a research career to publish results indicating that, to put it mildly.
As Mencken said: 'It is difficult to get a man to understand something, when his salary depends on his not understanding it.'