Cysteamine

Hyperpigmentation and Hypopigmentation: How They Differ and How to Treat Both
How to treat dark and light spots on your skin.

Dermatologists Say These Are the Best Brightening Ingredients for Every Skin Tone
Vitamin C, cysteamine, tranexamic acid, and more.

How to Beat a ‘Melasma Mustache’ Like a Dermatologist All Year Long
You don't have to live with the summer stache forever.