“I used to experience a lot of stiffness in my knees as a consequence of osteoarthritis. I wouldn’t manage to rise up right after sitting down down for very long. But ever since JointLab arrived into my life, I'm able to do things that I wasn’t in a position to do right before.?ây c?ng ??u là nh?ng d??ng ch?t c?u t?o nên nhân nh?y và bao