As someone who conducts research in this realm for a living, what study are you referring to?Fyi... Contrary to very popular belief, body joints, backs and pretty much every other body part don't wear out and break down like car parts. A long term (e.g., 30 year) study indicated lack of use, trauma (auto accident, etc.) and diet cause them to wear out and break down over time.
. And by far, it's dietary issues.
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