Skincare Ingredient
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Urea
In Skincare: Is Urea Safe? Comedogenic Rating & Side Effects
Safety Information
Quick Insights
At a glance
- 01
Urea is a humectant naturally present in skin’s Natural Moisturizing Factor, helping to draw moisture to the surface.
- 02
Urea effectively improves the appearance of dry to very dry, scaly skin by increasing hydration.
- 03
Concentrations exceeding 5% of urea can provide mild to significant exfoliation, gently removing dead skin cells.
- 04
Cosmetic formulations containing higher concentrations of urea may exhibit aesthetic changes or an odor.
- 05
Synthetic urea is commonly utilized in cosmetic products as a moisturizing and exfoliating ingredient.
Key Benefits
What Urea does for your skin
Overview
Ingredient Profile
Data & Research
Scientific Facts
Common Uses
Formulation in Urea
Role of Urea
Active Cosmetic Mechanisms
ANTISTATIC
Static EliminatorReduces static electricity and flyaway hair
SCIENTIFIC ANALYSIS
// Evidence: Antistatic agents neutralize electrostatic charges through cationic surfactants (quaternary ammonium compounds like behentrimonium chloride) or conductive polymers that increase surface conductivity to dissipate charge or attract moisture. The mechanism involves forming a conductive film on fiber surfaces, neutralizing charge buildup. Particularly effective on damaged hair with raised cuticles.
BUFFERING
pH StabilizerMaintains stable pH levels in products
SCIENTIFIC ANALYSIS
// Evidence: Buffering systems resist pH changes through weak acid-conjugate base pairs (citric acid/sodium citrate, lactic acid/sodium lactate, phosphate salts) that operate within specific pH ranges based on their pKa values. The mechanism follows the Henderson-Hasselbalch equation, with buffer components neutralizing added H⁺ or OH⁻ ions. Proper buffering prevents pH drift and maintains efficacy.
HUMECTANT
Moisture MagnetAttracts and retains moisture in skin and hair
SCIENTIFIC ANALYSIS
// Evidence: Humectant ingredients draw water from the environment and deeper skin layers through hygroscopic properties. Common humectants include glycerin, propylene glycol, hyaluronic acid, urea, and alpha-hydroxy acids. These contain multiple hydroxyl groups or other hydrophilic functional groups that form hydrogen bonds with water molecules. Mechanism involves attracting water to the stratum corneum, reducing transepidermal water loss, and increasing skin hydration.
SKIN CONDITIONING
Skin EnhancerMaintains skin in good condition and improves its feel
SCIENTIFIC ANALYSIS
// Evidence: Skin conditioning ingredients enhance appearance, texture, and health of skin through various mechanisms. This broad category encompasses emollients, humectants, occlusives, and other agents that improve skin feel, appearance, and function. May work by moisturizing, smoothing, softening, or protecting skin. Effects include improved tactile properties, enhanced barrier function, and better overall skin condition.
Products
containing Urea
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References
Scientific sources
Skin Pharmacology and Physiology, October 2021, pages 102–111
Dermatologic Therapy, November 2018, ePublication
Journal of Drugs in Dermatology, May 2016, pages 633–639
Dermatology Online Journal, November 2013, ePublication
The Art and Science of Moisturizers, Springer Berlin Heidelberg, 2012, pages 481-492
International Journal of Toxicology, 2005, pages 1-56
American Journal of Clinical Dermatology, March 2002, pages 217-222
Similar Ingredients
Ingredients with similar chemical profiles and skincare properties.
Frequently Asked Questions
Urea — common questions
What is Urea in skincare?
Urea is a white crystalline powder or small pellets. It’s commonly used in cosmetic products such as skincare, hair care (both colored and non-colored), and eye makeup.
What does Urea do? / Functions of Urea?
Common functions: ANTISTATIC, BUFFERING, HUMECTANT, SKIN CONDITIONING.
What is the comedogenic rating of Urea? / Is Urea comedogenic?
Urea has a comedogenic rating of 1 out of 5. A rating of 1 means it is unlikely to clog pores.
Does it clog pores?
Urea is unlikely to clog pores (rating 1/5).
Is Urea safe for skin?
Urea has a safety rating of 2 out of 5. A rating of 2 means it is generally considered safe for most skin types. Note: May cause mild stinging or irritation, particularly in individuals with sensitive or compromised skin barriers; the Cosmetic Ingredient Review (CIR) Expert Panel has concluded that urea is safe for us
Is Urea good for sensitive skin?
Urea has an irritancy rating of 2 out of 5. A rating of 2 means it is generally well-tolerated.
What are the side effects of Urea in skincare?
Known considerations: May cause mild stinging or irritation, particularly in individuals with sensitive or compromised skin barriers; the Cosmetic Ingredient Review (CIR) Expert Panel has concluded that urea is safe for use in cosmetics under current conditions of use. The Environmental Working Group (EWG) rates urea as low hazard, with limited evidence of systemic toxicity or reproductive toxicity.