An estimated one-fifth of U.S. adults suffers from doctor-diagnosed arthritis, according to the Centers for Disease Control and Prevention (CDC), and two-thirds of obese people are likely to develop symptomatic knee osteoarthritis (OA) in their lifetime, making joint health a major concern for a large chunk of the population. As more consumers recognize the importance of healthy joints throughout their lifetimes, they are turning to natural researched-backed ingredients that keep them flexible.