Medically reviewed by Kayla Girgen, RD Collagen is a protein in the body that provides structural support to skin, bones, ...

The primary protein in cartilage, Type II Collagen (CII) is crucial to joint ... Between the ages of 65 to 93 years, the patients had disease in varying stages and were receiving different treatments.

Molecular and genetic tests help verify whether the mutation is present in the gene coding for collagen. Ultrasound during pregnancy can help diagnose Type II disease. The disease has no cure.