> Dave Asprey claims that calcium oxalate (abundant in spinach) can cause arthritis. Cause or "is correlated with"? I know that spinach (and other high oxalat

> Dave Asprey claims that calcium oxalate (abundant in spinach) can cause arthritis. Cause or "is correlated with"? I know that spinach (and other high oxalate foods) should not be eaten more than once or twice per week.