What is collagen?

Collagen is indeed a fibrous tissue made primarily from protein. It is the most abundant protein in the human body, providing structure, strength, and support to various tissues, including the skin, tendons, ligaments, and cartilage. In the context of skin health, collagen plays a crucial role in maintaining elasticity and firmness, which decreases with age or due to environmental factors. This makes understanding collagen essential for anyone in the skincare and beauty industry, especially for facial specialists who work with skin treatments and products targeted at improving skin texture and reducing signs of aging.

The other options do not accurately describe collagen. The first option refers to tissue that encloses the skin but does not specify the composition that defines collagen. The second option describes hormones, which are not related to the structure or composition of collagen. The fourth option discusses minerals that strengthen bones, which are a different category of biological materials and do not pertain to collagen's functional role in the body.