Coffee linked to slower biological ageing among those with severe mental illness

Separately from this study, here's an interesting opinion piece by John Ioannidis titled "The Challenge of Reforming Nutritional Epidemiologic Research", published in JAMA 2018:

https://statmodeling.stat.columbia.edu/wp-content/uploads/20...

  > Assuming the meta-analyzed evidence from cohort
  > studies represents life span–long causal associations, for
  > a baseline life expectancy of 80 years, eating 12 hazelnuts
  > daily (1 oz) would prolong life by 12 years (ie, 1 year per
  > hazelnut), drinking 3 cups of coffee daily would achieve
  > a similar gain of 12 extra years, and eating a single man-
  > darin orange daily (80 g) would add 5 years of life. Con-
  > versely, consuming 1 egg daily would reduce life expec-
  > tancy by 6 years, and eating 2 slices of bacon (30 g) daily
  > would shorten life by a decade, an effect worse than
  > smoking. Could these results possibly be true?

via Andrew Gelman's blog: https://statmodeling.stat.columbia.edu/2019/01/26/article-po...

Good thing I drink hazelnut coffee while eating eggs and bacon! It cancels out right?

these things are 100% true. I eat one hazelnut per hour and have lived already 230 years.

also this explains squirrels

You're joking, but that's probably the right strategy: make sure to enjoy things on both sides of the aisle, so you don't have to worry about which side adds, and which removes, years. And then don't fret about it.

Aside from that, I'd love to know how each of those items affects life quality. Living long is only a life goal up to a certain age, and from what I've seen around me, that age is very rarely 90.

I assume these needs to be indications on overall diet.

Edit: i.e a bacon eater consumes a higher than average caloric intake, hazelnut eaters have more greens/vegetables in their diet possibly

Yeah, living to old age at the cost of overoptimizing every little thing in your life does not seem like a worthwhile endeavor. You'll only add years that won't be terribly useful or pleasant anyway, because anyone has to deal with some form of wear and tear regardless. At the very least, all the old people I know have to deal with some audition and sight loss, and even when they are in decent physical shape, they seem to be hurting somewhere.

It feels like trying to be immortal, which is a bit of a folly.

Anyway, the other day I noticed that Warren Buffett is just retiring at the age of 94. The man has eaten McDonald's for breakfast for much of his life. Diet cannot be that big of a deal.

What those epidemiological studies reveal is that food associated with higher class makes you live longer, which is reverse causation, at best.