How to Use Vitamin C Serum and an AHA or BHA in Your Skincare Routine for Bright, Even-Toned Skin
The right way to layer these glow-getters.
Ethyl Ascorbic Acid
How to Use Retinol and Vitamin C in Your Skincare Routine: The Right and Wrong Way to Apply Them
Before you mix or layer these ingredients, read this.
The Reason Vitamin C Serum Can Darken Your Skin (And How to Stop It from Happening)
Serum staining your face and fingers? Here's what to know.