... large size of molecular have different function. (molecular weight is 300-1600000, the large size of molecular is good ... as liver, kidney, muscle etc ), So, Collagen Type II has the function of second birth for joints, skeleton, lumber, skin ... function.1st; To disease of bones, such as osteoporasis, osteoarthritis, osteonecrosis, protrusion of the lumber intervertebral disc etc , Collage type II ...