Skincare Science: Ingredients, Claims, and Research Explained

Skincare Science is where we explain the research and reasoning behind skincare advice — not just what to do, but why it's supposed to work. This page covers four areas: how to read marketing claims like “hypoallergenic” and “clinically tested,” how core ingredients such as humectants and occlusives actually function, why skin pH matters for your skin barrier, and common skincare myths explained with dermatology-backed facts — plus a look at how skincare research itself works. For additional context on how cosmetic claims are regulated, the FDA's own guidance on hypoallergenic cosmetics is worth a look, and it's one of the sources this Skincare Science category draws on throughout.

Reading Claims and Research

Start here to understand what the words on a label and in an ad actually require — and don't.

How Ingredients and pH Work

Once you know what a claim is actually worth, here's the mechanism behind what's in the bottle.

Common Myths, Debunked

Pores, detoxing, and whether skin "gets used to" products — separating the dermatology from the folklore.

Skincare Science FAQ

What does the Skincare Science category cover?

It covers the plain-language science behind skincare — how to read marketing claims like "hypoallergenic" and "clinically tested," how core ingredients such as humectants and occlusives actually work, why skin pH matters for the skin barrier, common skincare myths explained with dermatology-backed facts, and how skincare research itself works.

How is this different from the Skincare Ingredients guide?

The Skincare Ingredients guide is a glossary of specific named ingredients and what they're used for. Skincare Science explains the underlying mechanisms and research instead — why a humectant or occlusive works the way it does, what marketing claims actually require, and how skin pH and the skin barrier relate to each other.

Where should I start if I just want to be a smarter skincare shopper?

Start with How to Read Skincare Marketing Claims, then Common Skincare Myths, Debunked by Science — together they cover most of what makes a claim or a buzzword worth trusting or skipping.