Collagen has become a popular supplement and skincare ingredient because it has been shown to improve skin elasticity. But when applied to the skin externally, this molecule is too large to pass through the skin’s barrier. Collagen supplements taken internally can be an option, as they are thought to improve the production of collagen dermal fibroblasts, which are the cells responsible for collagen production. Another option is an IV treatment that is designed to support natural collagen production. It involves the use of a combination of the building blocks and nutrients that support collagen formation and skin health overall.