🎯 At a Glance
🔬 How It Actually Works
An inorganic compound used primarily to coat Titanium Dioxide in sunscreens to prevent it from clumping. It also acts as an anti-caking agent and optical blurrer.
💖 Why your skin loves it
Ensures mineral sunscreens apply evenly and smoothly, and blurs imperfections.
💡 Pro Tip
Usually found in high-quality physical sunscreens.
⚖️ Myth vs. Fact
The Myth
It absorbs into the brain and causes Alzheimer's.
The Science
Alumina is an insoluble, highly stable ceramic mineral that absolutely cannot penetrate the skin barrier.
