Efficacy of INTOFINE-JOINT SUPPORT DIETARY SUPPLEMENT on Bone and Joint Health

The goal of this clinical trial is to evaluate whether INTOFINE-JOINT SUPPORT DIETARY SUPPLEMENT improves joint health in adults aged 40-60 years with mild symptomatic knee osteoarthritis (defined by WOMAC total score 20-32 and knee pain VAS score 2-4). It will also assess the safety of the test product. The main questions it aims to answer are: Does the test product relieve knee pain, stiffness and physical activity difficulty measured by the WOMAC Osteoarthritis Index? Does the test product reduce pain intensity evaluated by the VAS Pain Scale? Can the test product improve 6-minute walking distance, sit-to-stand ability, stair-climbing performance and the range of motion of the hip and knee joints? What adverse reactions or safety issues do participants have when taking the test product? This is a single-arm, self-controlled clinical trial. Researchers will compare the test results of participants before and after taking the product to verify its efficacy in improving joint function. Participants will: Take 2 capsules of the test product once daily, 1 hour after meals, for 60 consecutive days Complete subjective efficacy evaluations, scale assessments and joint function tests at D3, D5, D14, D30, D40 and D60 Undergo safety follow-up tests of blood glucose, liver function and renal function at D56 Report joint symptoms and provide satisfaction feedback during the trial period