Glycerin: The Hydration Essential in Every Routine

Glycerin (glycerol) has 90-93% dermatologist support as the gold standard humectant. It's in almost every moisturizer for good reason—it simply works.

What is Glycerin?

Glycerin is a simple polyol (sugar alcohol) that occurs naturally in skin. It's the most widely used and studied humectant in skincare, with decades of safety and efficacy data.

How Glycerin Works

Humectant Action

Glycerin draws water from:

The environment (in humid conditions)

Deeper skin layers to the surface

Products applied underneath it

Barrier Support

Beyond hydration, glycerin:

Improves skin barrier function

Reduces transepidermal water loss (TEWL)

Enhances skin elasticity

Supports natural lipid synthesis

Why Glycerin is Exceptional

Glycerin vs Other Humectants

How to Use Glycerin

Optimal Concentrations

3-10%: Ideal range for most products

>20%: Can feel too sticky

<3%: May be too low for noticeable effect

Application Tips

Apply to damp skin: Maximizes water-attracting effect

Layer under occlusives: Seal in the hydration

Use in humid environments: Glycerin works best with ambient moisture

In dry climates: Always follow with an occlusive layer

Addressing Concerns

"Glycerin feels sticky"

Look for formulations with optimized concentrations

Layer with other products—it absorbs well when not isolated

"Does glycerin dry out skin in low humidity?"

Theoretically possible, but unlikely with modern formulations

Always seal with a moisturizer or occlusive

The Bottom Line

Glycerin is the workhorse of hydration. It's safe, effective, and affordable. Look for it in your moisturizers, serums, and toners—its presence is a sign of a well-formulated product.