This study investigated the effects of the precursor of hyaluronic acid, NAG, and the next-generation glucosamine, turmeric extract on joint health. The results of the study showed that NAG was more effective in promoting joint cartilage synthesis compared to glucosamine, and that turmeric extract played a role in various physiological activities. The study included 120 subjects with borderline arthritis, and the dosage was 1,000 mg/day with measurements taken at 21 and 42 days