Which of the following substances can be found between fibers in the dermis and helps maintain hydration?

Glycosaminoglycans are vital components found between fibers in the dermis, serving as key molecules in maintaining hydration. They are long, unbranched polysaccharides that attract and hold water, creating a gel-like consistency that keeps the skin hydrated and plump. This hydration is essential for maintaining skin elasticity, structure, and overall health.

While elastin and collagen are important structural proteins that provide strength and elasticity to the skin, they do not have the same hydrating properties as glycosaminoglycans. Hyaluronic acid, although also known for its ability to retain moisture, is actually a specific type of glycosaminoglycan; however, the terminology used in the question specifically refers to glycosaminoglycans as a broader category. Therefore, glycosaminoglycans encompasses various substances, including hyaluronic acid, which play an essential role in water retention and hydration within the dermal matrix.