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Short excerpt from a YouTube talk by Dr. Charles Mok discussing how single-joint (e.g., knee) arthritis reduces lifespan and affects mobility. Cited study estimates a lifespan reduction of about 1.8 years for people of normal weight and about 3.5 years for those who are obese. The speaker also warns that steroid joint injections may accelerate progression toward joint replacement and that hyaluronic acid injections provide limited symptomatic benefit but do not reverse arthritis.










