Passion fruit peel extract may improve knee health‎

Extracts from the peel of purple passion fruit may reduce measures of pain and stiffness in people suffering from knee osteoarthritis, says a new randomized, double-blind, placebo-controlled trial. 
Writing in Nutrition Research, scientists from Iran, the USA, and New Zealand report that, according to scores on the widely accepted WOMAC scale, 60 days of supplementation with the passion fruit peel extract reduced pain and stiffness of the knees by about 18 percent.