What serum makes you look younger?

Could you elaborate on what type of serum you're referring to that claims to make one look younger? Is it a skincare product, a dietary supplement, or something else entirely? And furthermore, do you have any evidence or scientific studies to support the efficacy of this serum in reducing the appearance of aging? It's important to approach such claims with skepticism and to carefully consider the potential risks and benefits before making any decisions about using such products.