Skincare Ingredient
Save ingredients to your skin profile and we'll use them when you look up products — instantly flagging what's reactive, neutral, or works well for your skin.
Betaine
In Skincare: Is Betaine Safe? Comedogenic Rating & Side Effects
Safety Information
Quick Insights
At a glance
- 01
Betaine assists skin in adjusting to fluctuations in moisture levels, contributing to balanced hydration.
- 02
Emerging research suggests betaine may visibly address uneven skin tone when applied topically.
- 03
Betaine is recognized for its gentle nature on the skin.
- 04
Betaine can be obtained from plant sources or produced synthetically.
- 05
Betaine is naturally present in both skin and the body.
Key Benefits
What Betaine does for your skin
Overview
Ingredient Profile
Role of Betaine
Active Cosmetic Mechanisms
HAIR CONDITIONING
Hair SoftenerImproves hair manageability, softness, and appearance
SCIENTIFIC ANALYSIS
// Evidence: Hair conditioning ingredients smooth the cuticle, reduce frizz, and add shine through cationic surfactants (behentrimonium chloride), silicones (dimethicone, amodimethicone), natural oils, and proteins. These deposit on negatively charged damaged sites, neutralizing charge, filling surface irregularities, and providing lubrication. Mechanism involves electrostatic attraction, film formation, and surface smoothing.
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 - HUMECTANT
Hydration BoosterDraws moisture into skin for hydration
SCIENTIFIC ANALYSIS
// Evidence: Humectant-type skin conditioners attract and bind water to increase skin hydration. Key ingredients include glycerin, hyaluronic acid, sodium PCA, urea, and propylene glycol. These hygroscopic molecules form hydrogen bonds with water from dermis and environment, increasing water content in stratum corneum. The mechanism involves osmotic gradient creation and water binding through hydrophilic functional groups. Results in plumping effect and improved skin flexibility.
Products
containing Betaine
One-step login · Made for your skin
Want analysis that actually fits your skin?
Sign in once — we'll remember your skin type and make every analysis more relevant for you. for free!
Joined by people who care about their skin
References
Scientific sources
International Journal of Toxicology, 2018, pages 28S-46S
Food Science and Biotechnology, October 2017, pages 1391-1397
The Journal of Chemical Physics, June 2015, ePublication
The American Journal of Clinical Nutrition, September 2004, pages 539-549
Skin Research and Technology, February 2003, pages 50-58
Similar Ingredients
Ingredients with similar chemical profiles and skincare properties.
Frequently Asked Questions
Betaine — common questions
What is Betaine in skincare?
Betaine is a skincare ingredient commonly used in cosmetic formulations.
What does Betaine do? / Functions of Betaine?
Common functions: HAIR CONDITIONING, HUMECTANT, SKIN CONDITIONING - HUMECTANT.
What is the comedogenic rating of Betaine? / Is Betaine comedogenic?
Betaine has a comedogenic rating of 1 out of 5. A rating of 1 means it is unlikely to clog pores.
Does it clog pores?
Betaine is unlikely to clog pores (rating 1/5).
Is Betaine safe for skin?
Betaine has a safety rating of 1 out of 5. A rating of 1 means it is generally considered safe for most skin types. Note: Humectant/osmolyte; CIR and cosmetic safety assessments support low toxicity and low irritation/sensitization; generally safe even for sensitive skin. The Cosmetic Ingredient Review (CIR) Expert Panel
Is Betaine good for sensitive skin?
Betaine has an irritancy rating of 1 out of 5. A rating of 1 means it is generally well-tolerated.
What are the side effects of Betaine in skincare?
Known considerations: Humectant/osmolyte; CIR and cosmetic safety assessments support low toxicity and low irritation/sensitization; generally safe even for sensitive skin. The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Betaine is safe as used in cosmetics. It is well-tolerated and has limited potential for causing adverse effects.