Skin Conditioning

Dimethyl Urea

INCI: DIMETHYL UREA

Reviewed by Kate · Last updated 14 Aug 2026

A conditioning agent primarily used in nail care formulations

Best For Skin Types

All

Addresses

Dryness, Hydration

Usage Frequency

Daily

What Is Dimethyl Urea?

Dimethyl urea is a synthetic organic compound belonging to the urea family of chemicals. In cosmetics, it functions as a conditioning and humectant agent, drawing moisture into the skin and helping to maintain hydration levels.

The ingredient is most commonly found in nail care products, where it helps soften and condition the nail plate and surrounding cuticles. It may also appear in some skincare formulations designed to support skin hydration and conditioning.

How It Works

Dimethyl urea functions as a humectant, meaning it has an affinity for water molecules. When applied to skin or nails, it attracts and binds moisture from both the environment and deeper skin layers, helping to plump the outer layers and improve hydration.

In nail formulations, it penetrates the nail plate to condition from within, reducing brittleness and improving flexibility and appearance.

Clinical Evidence & References

Research on dimethyl urea specifically in skincare applications is limited. Most cosmetic use data comes from formulation studies and ingredient safety assessments rather than dedicated efficacy trials in human volunteers.

The ingredient has a long history of safe use in cosmetic formulations at typical concentrations. Any conditioning benefits are consistent with the general properties of urea-based humectants, though individual product efficacy will depend on formulation and concentration.

How to Use

Dimethyl urea is typically incorporated into finished products by manufacturers rather than used as a standalone treatment. Follow the instructions on your chosen product, which will specify application frequency and method. For nail care products, consistent use over several weeks is generally needed to see visible improvements in nail quality.

Safety & Precautions

Dimethyl urea is generally well-tolerated in cosmetic formulations at approved concentrations. It is not the same as diuron, an agricultural herbicide with different safety profiles; the two should not be confused.

Frequently Asked Questions

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