Vitamin C: What It Is, Forms, Cautions, and Clean Brands

Vitamin C is ascorbic acid, an essential antioxidant vitamin. It supports normal immune function and collagen formation.*

Forms and what to look for on the label

Ascorbic acid, buffered forms, and liposomal forms.

Before you take it

High doses can cause loose stools. If you’re prone to kidney stones, talk to your doctor.