[ExI] link
Dave Sill
sparge at gmail.com
Sat Dec 5 19:51:00 UTC 2020
On Sat, Dec 5, 2020 at 2:28 PM Stuart LaForge via extropy-chat <
extropy-chat at lists.extropy.org> wrote:
>
> The glucosamine effect seems legit since they are getting
> reproducible results from studies on both sides of the Atlantic.
>
It's an observational study: it can't determine the cause no matter how
repeatable it is. Many of these studies (meat is bad, eggs are bad, X is
good, etc.) are just demonstrating the healthy user bias. Healthy people
exercise, take supplements, don't smoke, don't drink, don't eat lots of red
meat, etc. So if you look at glucosamine users, most are in the healthy
user camp. Until you take a random sample of the population and assign half
to take glucosamine and half to not take glucosamine, and follow them for
years, you can't say glucosamine was the cause of a difference in mortality.
-Dave
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