Elastin is a protein found in connective tissues, providing elasticity and resilience to various structures in the body. It allows tissues to stretch and return to their original shape, which is essential for organs like the lungs, skin, and blood vessels. This protein is produced by fibroblasts, a type of cell responsible for creating connective tissue. As we age, the production of elastin decreases, leading to signs of aging such as sagging skin and reduced flexibility in blood vessels. Maintaining healthy levels of elastin is important for overall tissue function and appearance.