In a study published in June, they took male mice with testosterone-driven hair loss and removed the fur from their backs. Each day, researchers smeared a small dose of deoxyribose sugar gel on the ...

You’re reading Allure, so my guess is that tretinoin is at least somewhere on your radar, but here’s a quick primer for the uninitiated: It’s a type of retinoid (the umbrella term used to describe all ...