Exercise resolves 72% of cases (FREE). Glucosamine + chondroitin: moderate-to-severe KNEE pain ONLY (not mild, not hip, not back). Boswellia AKBA: faster-acting anti-inflammatory. HA injections: NO better than placebo + 50% MORE serious adverse events. Kirkland G+C at $0.20/day vs Xymogen $9.61/day = 96x markup for same ingredient.