What is the most abundant protein found in the human body?

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Collagen is the most abundant protein in the human body, making up about 30% of the total protein content. It is a crucial component of connective tissues, including tendons, ligaments, skin, and cartilage. Collagen fibers provide structural support and strength, helping to maintain the integrity and resilience of tissues throughout the body. The various types of collagen have unique properties and functions, contributing to different aspects of tissue structure and function.

Keratin, actin, and elastin serve significant purposes in the body but are not as plentiful as collagen. Keratin is primarily found in hair, nails, and the outer layer of skin, providing protection and strength. Actin is an essential protein in muscle contraction and cellular movement but is less abundant overall. Elastin contributes to the elasticity of tissues such as skin and blood vessels but exists in smaller quantities compared to collagen. Thus, collagen's abundance and role in providing structural integrity make it the most prominent protein in the human body.

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