---
title: "Glossary"
description: "Explore clear definitions of cosmetic ingredients and skincare terms, from formulation roles to label language and practical use."
---
# Glossary

> Explore clear definitions of cosmetic ingredients and skincare terms, from formulation roles to label language and practical use.

Source: https://cosmetic-labs.com/glossary
Created: 2026-11-11T10:28:51+00:00
Modified: 2026-11-11T10:28:51+00:00
Author: Emilie SCHOL

## Explore cosmetic terms by topic
Looking up an ingredient or trying to understand a product label? Explore the terms below by topic, or use the A–Z index to find a specific definition. Each entry explains what a term means and where it fits in cosmetic formulations and skincare routines.

- [Emollients](/glossary/emollient/) and [humectants](/glossary/humectant/): how different ingredients contribute to skin feel and moisture.
- [Surfactants](/glossary/surfactant/) and [emulsifiers](/glossary/emulsifier/): cleansing, mixing and formula texture.
- [Preservatives](/glossary/preservative/): why formulas need protection from contamination.
- [Niacinamide](/glossary/niacinamide/) and [retinol](/glossary/retinol/): common skincare ingredients and their different uses.
- [Skin barrier](/glossary/skin-barrier/) and [non-comedogenic](/glossary/non-comedogenic/): terms you may encounter in product descriptions.
- [Sun protection](/glossary/broad-spectrum-sunscreen/): how to interpret broad-spectrum and mineral sunscreen terminology.

### Clear cosmetic terminology
Understand ingredient names, formulation roles and skincare terms in plain English. Each definition helps you read a label without assuming that one ingredient determines the performance of a finished product.

### Ingredients in context
Explore what ingredients can do in a formula, from retaining moisture to cleansing or preserving it. Product type, concentration and the rest of the formulation matter too.

### Know the limits of a claim
Learn the difference between an ingredient’s function, a cosmetic claim and a finished product’s tested performance. Terminology and labeling rules can also vary between markets.

### Compare terms with confidence
Go beyond a quick definition to tell humectants from emollients, surfactants from emulsifiers, and sunscreen labels from ingredient lists.

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## I

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## Keep exploring cosmetic knowledge
Use the glossary alongside Cosmetic Labs articles and the company directory to connect ingredient terminology with formulation, product development and the partners behind a cosmetic project.

[Explore articles](https://cosmetic-labs.com/articles) [Browse cosmetic labs](https://cosmetic-labs.com/world)

---

## Site identity

- Organization: Cosmetic Labs
- Description: Cosmetic Labs is a directory and a platform to meet all your cosmetic product development needs. From sourcing raw material to finding the best CRO for your needs.
- Website: https://cosmetic-labs.com

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