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50 Years of Knuckle Cracking Did Not Produce Arthritis

Posted Aug 30 2012 12:00am

Warned by relatives that knuckle cracking causes arthritis, Donald Unger decided to crack only the knuckles of his left hand. For 50 years he frequently cracked his left hand, never his right. Finally he wrote a letter to a scientific journal (in which he calls himself “the author”) pointing out that he did not have arthritis in either hand, supporting the conclusion of another study which studied a much smaller amount of knuckle cracking.

Thanks to Bryan Castañeda via Now I Know .

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