At the very first sign of cold symptoms, many people reach for Vitamin C, whether in supplements, juices, cough drops, tea, or other forms. Vitamin C was first touted for the common cold in the 1970s.

Whether you’ve been looking to simplify your skin care routine or amp it up, a vitamin C serum might be your golden ticket. Topical vitamin C is a multipurpose workhorse that can protect, repair, and ...