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Ingredient Spotlight

Glycerin

The Cosmetic Industry's Most Trusted Humectant

A dependable cosmetic humectant used to support hydration, improve skin feel and build balanced moisture systems.

Humectant
Barrier Support
Water Soluble
Skin Compatible
Explore the ingredient

Quick Facts

INCI Name

Glycerin

CAS Number

56-81-5

Appearance

Clear, colourless viscous liquid

Solubility

Water soluble

Origin

Vegetable (plant-derived)
JNA Ingredient Co. Jul 20, 2026 Ingredient Spotlight

Why Glycerin Matters in Skincare

Glycerin has earned its place as one of the most widely used cosmetic ingredients because it delivers reliable, proven hydration across almost every type of skincare formulation. From lightweight facial serums to rich moisturisers and gentle cleansers, it helps improve skin comfort, softness and overall performance.

As a naturally occurring humectant, glycerin attracts water and helps keep it within the outer layers of the skin. This supports a healthier-looking skin barrier, improves the sensory feel of formulations and helps reduce moisture loss throughout the day.

Despite being one of the oldest cosmetic ingredients still in widespread use, glycerin remains a benchmark ingredient for formulators because of its versatility, excellent safety profile and compatibility with almost every modern skincare system.

Glycerin doesn't simply add moisture to the skin - it helps the skin retain the water it already has.

This is why it’s found in over

70+

Years of widespread cosmetic use and still considered one of the benchmark humectants in modern skincare formulation.*

*Based on published cosmetic science literature and long-standing industry use. See article references for supporting publications.

Where You'll Find It

Serums
Moisturisers & Creams
Cleansers
Masks
Toners
Body Care
What Is Glycerin?

Ingredient Overview

What Is Glycerin?

Glycerin is a clear, colourless humectant widely used in skincare and personal-care formulations. Its main role is to attract and hold water, helping support hydration within the formula and at the skin’s surface.

It is valued because it is highly versatile, easy to formulate with and compatible with a wide range of cosmetic ingredients. In well-balanced formulations, glycerin can improve moisture retention, support a smoother skin feel and help reduce the dry or tight sensation that can occur after cleansing.

Although glycerin is often considered a basic ingredient, its performance depends on concentration, formulation balance and the overall system in which it is used. At appropriate levels, it remains one of the most dependable hydration ingredients available to formulators.

Intense Hydration

Benefits of Glycerin

Acts as a powerful humectant by attracting water to the skin, helping maintain moisture and reducing feelings of dryness.

Intense Hydration

Intense Hydration

Acts as a powerful humectant by attracting water to the skin, helping maintain moisture and reducing feelings of dryness.

Supports the Skin Barrier

Supports the Skin Barrier

Helps maintain hydration within the outer layers of the skin, supporting a healthier and more resilient skin barrier.

Gentle for Daily Use

Gentle for Daily Use

Well tolerated by most skin types, including dry and sensitive skin, making it suitable for everyday cosmetic formulations.

Highly Compatible

Works alongside a wide range of cosmetic ingredients including hyaluronic acid, panthenol, niacinamide, botanical extracts and modern humectants.

Reliable Performance

Provides consistent hydration while contributing to formulation stability and maintaining performance across many cosmetic product types.

Together, these characteristics have made glycerin one of the most widely used cosmetic ingredients for decades. Its combination of proven hydration, skin compatibility and formulation versatility continues to make it a benchmark humectant in modern skincare.

Ingredient Science

How Glycerin Works

Glycerin works by attracting and holding water molecules, helping maintain hydration within the formula while supporting the skin's moisture balance.

Glycerin attracts and binds water through hydrogen bonding, helping support hydration within the stratum corneum.

How Glycerin Works
Glycerin attracts and binds water through hydrogen bonding, helping support hydration within the stratum corneum.

Glycerin is a humectant, meaning it attracts water through hydrogen bonding. When incorporated into a cosmetic formulation, it binds available moisture and helps keep water distributed throughout the product.

After application, glycerin continues to attract moisture, helping reduce transepidermal water loss (TEWL) and improving the hydration of the outer layers of the skin. This contributes to softer, smoother-feeling skin and supports normal barrier function.

Within the formulation itself, glycerin also helps prevent products from drying out, improves spreadability and contributes to a pleasant skin feel when used at appropriate concentrations.

Its effectiveness is influenced by the overall formulation, including the concentration of glycerin, the presence of occlusive ingredients, environmental humidity and the balance of other humectants.

Formulation Insights

Why Professional Formulators Choose Glycerin

Despite the availability of many modern humectants, glycerin remains one of the most widely used cosmetic ingredients because it consistently delivers hydration, formulation stability and exceptional versatility. Its compatibility with a broad range of ingredients makes it a reliable choice across almost every cosmetic formulation system.

Exceptional Compatibility

Glycerin works well alongside most cosmetic ingredients, including hyaluronic acid, panthenol, niacinamide, botanical extracts, surfactants and emulsifiers, making it easy to incorporate into diverse formulations.

Simple to Formulate

As a fully water-soluble ingredient, glycerin is easy to incorporate into the water phase without specialised processing, helping streamline formulation development.

Reliable Performance

Glycerin has decades of proven cosmetic use and consistently delivers dependable hydration, making it a trusted ingredient for both beginner and professional formulators.

Versatile Across Products

Suitable for serums, moisturisers, cleansers, toners, masks, haircare and body care, glycerin performs effectively across a wide range of cosmetic formulation systems.

Reliable Performance

Glycerin performs well across a broad concentration range, allowing formulators to fine-tune hydration, skin feel and product performance to suit different applications.

For many formulators, glycerin remains a foundational ingredient because it combines proven efficacy, formulation flexibility and excellent ingredient compatibility. Rather than being replaced by newer humectants, it is frequently used alongside them to create balanced hydration systems with improved sensory performance and long-term skin moisturisation.

Typical Use Levels

Typical Use Levels for Glycerin

Glycerin performs well across a wide concentration range

Application
Typical Use
Notes
Facial Serum
2–5%
Lightweight hydration
Toner
1–5%
Reduces Tackiness
Gel
2–8%
Excellent skin feel
Moisturiser
3–10%
Most common
Cleanser
1–5%
Helps reduce dryness
Mask
5–15%
Intensive Hydration

While Glycerin remains effective across a broad concentration range, the ideal use level depends on the formulation type, desired skin feel and the balance of other humectants within the system. Selecting the appropriate concentration helps maximise hydration while maintaining the elegant aesthetics expected of modern cosmetic formulations.

Formulation Best Practice

Formulating with Glycerin

Glycerin is one of the most straightforward cosmetic humectants to formulate with thanks to its excellent water solubility, broad ingredient compatibility and stability during normal cosmetic manufacturing. While easy to incorporate into most formulations, achieving the best results depends on selecting an appropriate concentration, balancing skin feel and considering the overall formulation system.

Add During

Water Phase

Add before emulsification.

Processing Temperature

Excellent

Suitable for hot and cold process.

Compatible pH Range

Broad (≈ pH 3–10)

Compatible with almost every skincare system.

Typical Maximum

10%

Higher levels may increase tackiness unless balanced with complementary humectants.

Professional Formulation Guidelines

Balance Skin Feel

Higher concentrations improve hydration but may increase tackiness.

Pair with Other Humectants

Combine with Sodium PCA, Propanediol 1,3 or Panthenol for improved sensory feel.

Match the Formula

Adjust concentration depending on whether the product is a serum, cream, toner or cleanser.

Validate Stability

Always assess viscosity, appearance and pH after incorporating glycerin into the final formulation.

Successful formulations rely on more than simply adding glycerin to a recipe. By incorporating it at the appropriate stage, selecting suitable concentrations and balancing it with complementary ingredients, formulators can create products that deliver long-lasting hydration while maintaining an elegant, stable and pleasant sensory profile.

Compatible Ingredients

Ingredients That Pair Beautifully with Glycerin

Glycerin is one of the most versatile ingredients used in cosmetic formulation because it performs exceptionally well alongside a wide variety of humectants, soothing actives, barrier-support ingredients and lightweight emollients. Selecting complementary ingredients allows formulators to optimise hydration, improve sensory feel and create more balanced, elegant skincare products.

01

Hydration Partners

These ingredients work synergistically with glycerin to improve water retention, support long-lasting hydration and create more effective moisture systems than glycerin alone.

Sodium PCA

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Sodium PCA complements glycerin by increasing the skin's natural moisturising capacity while improving skin feel and reducing the tackiness that can occur at higher glycerin concentrations.

Sodium Hyaluronate

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Sodium Hyaluronate works alongside glycerin by attracting and retaining water within different layers of the skin, providing immediate and long-lasting hydration.

Oat Beta-Glucan

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Beta-Glucan complements glycerin by providing soothing hydration while supporting barrier repair and reducing visible skin dryness.

Panthenol (Vitamin B5)

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Panthenol enhances glycerin's hydrating properties while supporting skin barrier function and improving overall skin comfort.
02

Barrier Support

Combining glycerin with barrier-supporting ingredients helps reinforce the skin's natural protective function while maintaining optimal hydration.

Ectoin

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Ectoin helps protect skin from environmental stress while glycerin maintains hydration, creating advanced barrier-support formulations for modern skincare.
03

Sensory Optimisation

These ingredients help improve skin feel, reduce tackiness and create more elegant formulations without compromising hydration performance.

Propanediol 1,3

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Propanediol improves spreadability and helps reduce the tackiness associated with higher glycerin concentrations while boosting moisturisation.

Pentylene Glycol

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Pentylene Glycol enhances skin hydration while contributing a lighter sensory profile and providing multifunctional formulation benefits.

Olive Squalane

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Olive Squalane provides lightweight emolliency that complements glycerin's water-binding properties, resulting in smoother skin feel and improved moisture retention.

One of glycerin's greatest strengths is its exceptional compatibility with almost every modern skincare ingredient. Whether formulating hydrating serums, rich moisturisers, gentle cleansers or barrier-support treatments, combining glycerin with carefully selected complementary ingredients allows formulators to maximise hydration performance while creating balanced, refined formulations.

Formulation System

Example Formulation Systems Using Glycerin

Glycerin is rarely used in isolation. Professional cosmetic formulations typically combine glycerin with complementary humectants, barrier-support ingredients and emollients to create balanced hydration systems with improved skin feel. The following examples illustrate common ingredient combinations used across different product categories. They are intended for educational purposes and represent ingredient systems rather than complete formulations.

Hydrating Facial Serum

Serum

Objective

Create a lightweight, fast-absorbing hydration system that delivers immediate moisture while maintaining an elegant, non-sticky skin feel.

Expected Performance

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Formulation Insight

Professional formulators typically combine multiple humectants with complementary skin-conditioning ingredients to create hydration systems that deliver immediate moisture while maintaining an elegant sensory profile.

Barrier Support Moisturiser

Moisturiser

Objective

Support skin barrier function while delivering lasting hydration and improving skin softness.

Expected Performance

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Formulation Insight

Barrier moisturisers generally combine humectants, barrier-support actives and lightweight emollients to improve hydration while reinforcing the skin's natural protective barrier

Hydrating Facial Toner

Toner

Objective

Deliver refreshing hydration while maintaining a light, water-like sensory profile suitable for daily use.

Formulation Insight

Lower glycerin concentrations are commonly used in toners to maintain a refreshing feel while still providing meaningful hydration and supporting skin comfort.

Gentle Hydrating Cleanser

Cleanser

Objective

Create a mild cleansing system that removes impurities while minimising the dry after-feel commonly associated with surfactant-based products.

Formulation Insight

Modern cleansers balance mild surfactants with conditioning ingredients and humectants to minimise dryness while maintaining effective cleansing performance.

These ingredient systems demonstrate how glycerin is typically incorporated into modern cosmetic formulations alongside complementary humectants, emollients and functional ingredients. Selecting the right combination depends on the finished product format, desired sensory profile and overall formulation objectives rather than relying on glycerin alone.

Quick Facts

INCI Name

Glycerin

CAS Number

56-81-5

Appearance

Clear, colourless viscous liquid

Solubility

Water soluble

Origin

Vegetable (plant-derived)

Starter Use Rate

1-10%