The Learning Lab
How Much Sunscreen Should You Use?
Most people should use: Face and neck: 2 finger-lengths of sunscreen Full body: 1 ounce (a shot glass) Reapply: every 2 hours Most people apply only 25–50% of this amount, which significantly reduces protection. How Much Sunscreen Should You Use on Your Face? Use the two-finger rule: Squeeze sunscreen along...
Is Zinc Oxide Sunscreen Safer? The Truth About Mineral vs Chemical Sunscreen
Yes. Zinc oxide sunscreen is safer. Not slightly. Fundamentally. It protects your skin without being absorbed into your body. That is the key difference between mineral and chemical sunscreen. Zinc oxide sits on top of your skin and reflects UV rays. Chemical sunscreens absorb UV radiation and convert it into...
Waxhead Sunscreen vs. Chemical Sunscreen: What You Need to Know
Short Answer: Waxhead Sunscreen uses non-nano zinc oxide, a physical mineral that sits on top of your skin and blocks both UVA and UVB rays without absorbing into your bloodstream. Chemical sunscreens work differently. They absorb into your skin, convert UV radiation into heat, and several of their active ingredients...
What Is Bemotrizinol? Tinosorb?
Short Answer Summary Bemotrizinol, often marketed under the name Tinosorb, is a modern chemical sunscreen ingredient used widely in Europe and Asia. It absorbs UV radiation and converts it to heat. It is more photostable than older chemical filters, but it is still petroleum-derived, still chemically active on skin,...
Non-Comedogenic SPF Guide: Clear Skin, Zinc Oxide Sunscreen
Your family deserves sunscreen that protects without causing breakouts or irritation. If you’ve ever applied sunscreen and ended up with clogged pores, greasy skin, or a breakout the next morning, you know the frustration. The sunscreen aisle is a gamble for many families: protect your skin from sun damage, or...
7 Reasons Sunscreen Stings Eyes. And How to Avoid It.
Picture this: you're getting ready for a beautiful day at the park with your family. You dutifully apply sunscreen to everyone's faces, and within minutes, your toddler is rubbing their eyes and crying. Sound familiar? You're not alone if you've ever dealt with sunscreen eye irritation during family outdoor adventures....


