Collagen is the most abundant protein in the body, providing structural support to connective tissues such as skin, bones, tendons, and ligaments. It consists Collagen is an abundant protein, accounting for about 30% of your body’s total protein. Collagen provides structure, strength and support throughout your body. Collagen is the most abundant protein in the body. Its fiber-like structure is used to make connective tissue. Like the name implies, this type of tissue connects other tissues and is a major component of bone, skin, muscles, tendons, and cartilage. It helps to make tissues strong and resilient, able to withstand stretching. In food, collagen is naturally found only in animal flesh like meat and fish that contain connective tissue. However, a variety of both animal and plant foods contain ... Collagen is a protein that supports the joints, provides structure to the skin, and protects organs in your body. Learn more about its uses and how to prevent collagen loss.