Glycerin vs Hyaluronic Acid: Why an Eye Formula Can Use Both
Glycerin and sodium hyaluronate both appear in our ingredient guide. Learn what humectants do and why a label cannot prove one formula is better.
The pep patch team · 4 min read
Journal
formulation
Everything we've published under Formulation.
Niacinamide Under the Eyes: Read the Formula, Not the Hype
What niacinamide's place in an eye-area formula means, why facial serums need their own directions and why dark-circle promises deserve caution.
The pep patch team · 3 min read
Single-Use Patches and the Waste Question
Why eye patches come in single sachets, what that packaging is doing, and an honest account of what we haven't solved yet.
The pep patch team · 4 min read
How to Read a Skincare Ingredient List in 60 Seconds
INCI order, the 1% line, and the function classes worth recognising — a fast, practical way to read any skincare label, using our own as the example.
The pep patch team · 5 min read
Why a Patch Instead of an Eye Cream?
Patch or cream? The honest differences — occlusion, dwell time, dosing and cost per use — and why most people end up using both, differently.
The pep patch team · 4 min read
Choosing an Eye Patch When Your Skin Reacts to Everything
If your skin reacts to most things, here's how to read an eye patch label, how to patch test properly, and what we deliberately leave out of ours.
The pep patch team · 5 min read
What's Actually Inside a Gel Eye Patch
Eye patches are mostly water held in a gel matrix. Here's what each part of the formula does, why preservation matters, and how to read the label.
The pep patch team · 5 min read
Why We Left Fragrance Out of an Eye Patch
What 'fragrance' means on an ingredient list, the difference between fragrance-free and unscented, and why we formulated without it.
The pep patch team · 5 min read