Planetary Herbals Flex-Ability is a classic Chinese formula (Shujin Chih), traditionally used to support muscles, bones and normal circulation. It has been widely used in Asia by athletes, martial artists and the elderly to support normal flexibility. Lifestyle Recommendations: avoid highly acidic foods such as tomatoes, peppers, oranges, eggplant, caffeine, chocolate, and white flour or sugar products. Exercise regularly. Other Planetary Herbals products to support muscles and bones include: Glucosamine MSM Herbal and Flex-Ability Tablets.