What is Glycerin and what does it do for skin?

One of the most effective humectants in skincare, drawing moisture into the skin for lasting hydration.

What is the best Glycerin product?

Based on our evidence-based scoring model, Aquaphor Healing Ointment Advanced Therapy by Aquaphor is the top-rated product containing Glycerin with a score of 97/100.

How many products with Glycerin are evaluated?

We have evaluated 356 products containing Glycerin, with 129 achieving exceptional scores (92+/100). The average score is 89/100.

Hydration

Glycerin

Glycerin is the most widely used moisturizing ingredient in skincare and arguably the most effective humectant available. It appears in an estimated 75 percent of all skincare products because it works reliably, safely, and affordably across every skin type. As a humectant, glycerin draws water from the environment and from deeper skin layers into the stratum corneum, increasing hydration levels measurably within hours of application. Unlike trendier ingredients, glycerin has decades of clinical research confirming its efficacy. It is one of the few ingredients that is both highly effective and almost universally tolerated -- allergic reactions to glycerin are virtually nonexistent. When you see glycerin high on an ingredient list (typically position 2 to 5), that product has a strong hydrating foundation.

Dry/DehydratedSensitiveEczema-Prone

356 Products

129 Exceptional

89 Avg Score

147 Brands

How Glycerin Works

Glycerin is a small three-carbon molecule with three hydroxyl groups that form hydrogen bonds with water molecules. This gives it exceptional water-binding capacity. Applied topically, glycerin sits in the stratum corneum and attracts water from both the atmosphere and the dermis below, maintaining hydration levels in the outer skin layer. Clinical studies show glycerin improves skin barrier function by enhancing corneocyte hydration and supporting the lipid bilayer structure. At concentrations of 5 to 20 percent, glycerin has been shown to improve skin hydration, reduce transepidermal water loss, and accelerate barrier recovery after damage. It also has mild antimicrobial properties and supports wound healing.

Forms in Products

Glycerin (Glycerol)

The standard form found in most products. Can be derived from plant oils (vegetable glycerin) or synthesized. Effective at 2 to 20 percent concentration. Nearly ubiquitous in moisturizers, cleansers, serums, and even some toners.

Glyceryl Glucoside

A modified form that combines glycerin with glucose for enhanced hydration and skin barrier support. Some studies suggest it activates aquaporin water channels in skin for deeper hydration.

Evidence-Based Benefits

Powerful Humectant Hydration

Draws and binds water to the skin surface, increasing stratum corneum moisture content. One of the most effective humectants known, with measurable hydration improvement within hours.

Barrier Repair Support

Supports the lipid barrier structure and accelerates recovery after damage from cleansing, environmental stress, or active ingredient irritation.

Skin-Identical Ingredient

Glycerin occurs naturally in human skin as part of the natural moisturizing factor (NMF). Topical application supplements what skin already produces, making it inherently biocompatible.

Universal Tolerability

Allergic reactions to glycerin are essentially unheard of. Safe for sensitive, eczema-prone, rosacea-prone, and compromised skin. Safe during pregnancy and breastfeeding.

How Glycerin Works in Your Routine

You do not typically buy a standalone glycerin product -- it works as a supporting ingredient in your cleanser, serum, and moisturizer. When choosing products, check the ingredient list: glycerin in positions 2 to 5 indicates a meaningful concentration. It pairs well with every other active ingredient without conflicts. For maximum benefit, apply glycerin-containing products to damp skin so the humectant has surface water to bind. In very dry climates, always seal glycerin-containing products with an occlusive moisturizer.