What Are Serums For: A Complete Guide

Discover what serums are for, how they differ from moisturizers, and which actives target hydration, acne, or aging. Learn layering, timing, packaging, and private-label options for your skincare brand.

Discover what serums are for, how they differ from moisturizers, and which actives target hydration, acne, or aging. Learn layering, timing, packaging, and private-label options for your skincare brand.