The Skincare Library
Every topic, explained clearly.
Videos from YouTube, Instagram and TikTok, organized by skin concern. Pick a topic to read the essentials and watch everything Dr. Guo has made on it.
Acne & Breakouts
Acne types · Treatments · Body acne · Scars
18 videos →
Pigmentation & Dark Spots
Dark spots · Melasma · Vitamin C · Dark circles
18 videos →
Aging Skin
Sun damage · Retinoids · Eye area · Trends
18 videos →
Sunscreen & Sun Protection
Choosing SPF · Application · Tanning · Myths
16 videos →
Routines & Basics
Core routine · Cleansing · Product order · Moisturizer
16 videos →
Product Reviews & Dupes
Dupes · Bestsellers · Before you buy · Worth it?
17 videos →
Hair & Nails
Hair loss · Scalp · Hair care · Nails
18 videos →
Bumps, Rashes & "What Is This?"
Bumps · Lumps · Rough skin · Rashes
17 videos →
Skin Cancer & Moles
Warning signs · Prevention · Mohs surgery · Research
16 videos →
Dry & Sensitive Skin
Skin barrier · Dry skin · Eczema · Redness
15 videos →
Cosmetic Treatments
Lasers · Lower face · Devices · Realistic results
16 videos →
Skincare Myths
Misinformation · Viral trends · Does it work? · Rumours
17 videos →
New videos every week
Educational content only. It is not medical advice and does not replace an assessment by your own doctor or dermatologist.