The Retinol Purge: Why Your Skin Gets Worse Before It Gets Better
Learn what the retinol purge is, why it happens, how long it lasts, and how to tell the difference between purging and a real breakout. Science-backed guide.
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Evidence-Based Skincare Articles
Written by the North Biomedical® team to provide thoroughly researched content on skincare science, anti-aging breakthroughs, and the latest advances in dermatological technology.
Nanoretinol® Formulation Update: What Changed, Why, and What It Means for Your Skin
See what changed in the December 2025 Nanoretinol formulation, why vitamin C was added to the base, how it supports stability, and what causes the golden tint.
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