Guides

Prescription Skincare Ingredient Guides

Deep dives into how prescription skincare ingredients work, what the clinical evidence shows, and how to use them safely.

Guide 5 min read

Hydroquinone for Melasma 2026: Does It Work and Is It Safe?

Hydroquinone 4% is the clinical gold standard for melasma, capable of reducing pigmentation scores by 70% in 8 weeks. Here's what the evidence shows — and what to know before you start.

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Guide 6 min read

Tretinoin for Beginners: How to Survive the Purge

Everything you need to know before starting tretinoin, including the moisturizer sandwich method and the 'tretinoin purge' timeline.

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