Julie's Health Club: Health claims: Knuckle cracking leads t

featuresblogs.chicagotribune.com — Part of an ongoing series looking at the reality behind health claims. Claim: Over the years, renowned authorities--mothers, aunts and a mother-in-law--warned Dr. Donald Unger that knuckle cracking leads to arthritis of the fingers. Reality: For 50 years, Unger, cracked... May 2, 2010 View in Crawl 4