What are peptides?

The Dictionary says: A chemical compound that is composed of a chain of two or more amino acids and is usually smaller than a protein. The amino acids can be alike or different.

In other words: Experts also recommend creams and serums with hyaluronic acid, ceramides, and peptides to hydrate and stimulate collagen and elastin production, plumping up the skin and pushing it away from the pooled blood.

Reference: Talia Abbas, "Puffy Eyes, Dark Circles, and Bags: Dermatologists Explain the Difference," 8 Aug. 2018