Is the main connective tissue of the body.  It is in muscles, tendons, arteries and veins, joints, etc etc..  and especially in SKIN.  The collagen matrix of the dermis is what gives skin its strength, lift, tone, fullness, elasticity, resilience and flexibility.  The sexy youthful appearance of your skin has everything to do with your skin’s collagen.  How much does it have and what shape is it in.