Progressive Complete Collagen - Citrus Twist - Non-GMO hydrolyzed collagen from pasture-raised, grass-fed cows that are free from antibiotics and added hormones. Collagen contains essential amino acids which help with connective tissue formation and maintain healthy bones, cartilage, teeth and gums. Collagen also helps in maintaining healthy hair, skin and nails. Complete Collagen has added Vitamin C which helps with collagen absorption.