A gentle conditioning ingredient that helps soften hair and reduce static without heavy buildup.
Irritation
low
Source
semi-synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
A gentle conditioning ingredient that helps soften hair and reduce static without heavy buildup.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
OLEAMIDOPROPYLDIMONIUM HYDROXYPROPYL HYDROLYZED COLLAGEN
A gentle conditioning ingredient that helps reduce static and improve manageability in hair, while providing light moisturization to skin.
Irritation
low
Source
semi-synthetic
A gentle, sulfate-free surfactant that helps create a rich lather without stripping the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
A gentle conditioning ingredient that reduces static and softens hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
A mild, low-irritation surfactant that helps create rich foam and improve product texture, but may not suit those with very sensitive or reactive skin.
Irritation
low
Source
semi-synthetic
Oleamine helps blend oil and water in cleansers and conditioners, but may be irritating or clog pores for sensitive or acne-prone skin.
Irritation
moderate
Source
synthetic
Antistatic Agent
Oleamine Bishydroxypropyltrimonium Chloride
A gentle conditioning ingredient that reduces static and improves manageability, but its synthetic nature may not suit all preferences.
Irritation
low
Source
synthetic
A gentle surfactant that helps create a rich lather without stripping the skin.
Irritation
low
Source
synthetic
A plant-derived compound that helps calm inflammation and protect skin from environmental damage, but more human studies are needed to confirm its benefits.
Irritation
low
Source
natural
Oleic acid is a natural fatty acid that softens skin and helps other ingredients absorb, but it can be moderately clogging for acne-prone skin.
Irritation
low
Source
natural
Thickener
OLEIC/STEARIC GLYCERIDES/DIMER DILINOLEATE CROSSPOLYMER
A gentle, plant-derived thickener that helps create a smooth, non-greasy feel in creams and lotions.
Irritation
low
Source
semi-synthetic
Oleostearine is a natural emollient that softens skin and thickens formulas, but it may clog pores for acne-prone individuals.
Irritation
low
Source
natural
A gentle, fatty-acid-enriched cocoa extract that moisturizes and provides antioxidant protection, suitable for most skin types.
Irritation
low
Source
semi-synthetic
A synthetic peptide that may help soften expression lines and improve skin firmness with low irritation risk.
Irritation
low
Source
synthetic
A gentle, sugar-derived surfactant that cleanses without stripping the skin, making it a good choice for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, oil-soluble antioxidant that helps protect skin from environmental stress while providing light conditioning.
Irritation
low
Source
semi-synthetic
A gentle, oil-friendly green tea derivative that brings antioxidant benefits to water-resistant or lipid-rich formulas.
Irritation
low
Source
semi-synthetic
A gentle, modified collagen that helps soften and smooth skin without clogging pores.
Irritation
low
Source
semi-synthetic
A mild, plant-derived surfactant that cleans effectively without over-drying, ideal for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A gentle, science-backed ingredient that mimics natural skin lipids to support a healthy moisture barrier.
Irritation
low
Source
synthetic
A gentle conditioning ingredient that helps detangle and soften hair without heavy buildup.
Irritation
low
Source
synthetic
A gentle antioxidant extract that may help firm skin and fight free radical damage, but more human studies are needed.
Irritation
low
Source
natural
Oleoyl sarcosine is a mild, amino-acid-derived surfactant that cleanses effectively while being gentle on the skin barrier.
Irritation
low
Source
semi-synthetic
A peptide that mimics natural signals to help skin look firmer and smoother over time.
Irritation
low
Source
synthetic
A synthetic peptide that may help soften expression lines and improve skin firmness with minimal irritation risk.
Irritation
low
Source
synthetic
A promising antioxidant that combines plant catechins with a fatty acid for better skin penetration and stability.
Irritation
low
Source
semi-synthetic
Oleoyl Tyrosine is a gentle, amino-acid-based ingredient that helps reinforce the skin barrier and improve hydration without irritation.
Irritation
low
Source
semi-synthetic
A gentle synthetic ingredient that helps balance oil production and refine pores without harsh side effects.
Irritation
low
Source
synthetic
Oleth-10 is a gentle emulsifier that helps mix water and oil, making creams and lotions smooth and stable.
Irritation
low
Source
semi-synthetic
A gentle, non-drying surfactant that helps cleanse without stripping the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
A mild, phosphate-based emulsifier that helps cleanse without stripping the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
Oleth-100 is a gentle synthetic emulsifier that helps blend oil and water in products, but it may be less common in modern formulations due to concerns about ethoxylated ingredients.
Irritation
low
Source
synthetic
Oleth-106 is a synthetic emulsifier that helps blend oil and water in products, but it may not be ideal for very sensitive skin due to potential ethoxylate-related impurities.
Irritation
low
Source
synthetic
Oleth-11 is a synthetic emulsifier that helps mix oil and water in products, but it may be mildly irritating for very sensitive skin.
Irritation
moderate
Source
synthetic
Oleth-110 is a gentle emulsifier that helps blend water and oil in creams and lotions, with a low risk of irritation.
Irritation
low
Source
synthetic
Oleth-12 helps mix water and oil in your products, but it may be mildly irritating or pore-clogging for sensitive or acne-prone skin.
Irritation
moderate
Source
synthetic
Oleth-15 helps mix oil and water in skincare, but may cause mild irritation for sensitive skin.
Irritation
moderate
Source
synthetic
Oleth-16 is a workhorse emulsifier that helps mix oil and water, but it may cause mild irritation for very sensitive skin.
Irritation
moderate
Source
synthetic
Oleth-2 is a gentle emulsifier that helps mix oil and water in creams and lotions, with a low risk of irritation.
Irritation
low
Source
semi-synthetic
A gentle synthetic emollient that helps products glide on smoothly without heavy greasiness.
Irritation
low
Source
synthetic
Oleth-2 Phosphate is a mild cleansing and emulsifying agent that helps blend oil and water in products, generally considered safe for most skin types.
Irritation
low
Source
semi-synthetic
Oleth-20 is a workhorse emulsifier that helps mix oil and water, but it may be moderately irritating or pore-clogging for sensitive or acne-prone skin.
Irritation
moderate
Source
synthetic
Oleth-20 Phosphate is a synthetic emulsifier that helps mix oil and water in products, but it may cause mild irritation for sensitive skin.
Irritation
moderate
Source
synthetic
Oleth-23 is a gentle synthetic emulsifier that helps mix water and oil in your products, but it may be less common in modern 'clean' beauty formulas.
Irritation
low
Source
synthetic
Oleth-24 helps mix oil and water in creams and lotions, but may cause mild irritation for sensitive skin types.
Irritation
moderate
Source
synthetic
Oleth-25 is a gentle synthetic emulsifier that helps mix water and oil in skincare, but it may be less common in clean beauty formulations.
Irritation
low
Source
synthetic
A gentle surfactant that helps cleanse without stripping the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
A synthetic emulsifier that helps mix oil and water, but may cause irritation for sensitive skin types.
Irritation
moderate
Source
synthetic
Oleth-30 is a gentle emulsifier that helps water and oil mix in your skincare products, but it may be too heavy for very oily skin types.
Irritation
low
Source
synthetic
Oleth-35 is a gentle synthetic emulsifier that helps mix oil and water in products, but it may be less common in natural-focused formulations.
Irritation
low
Source
synthetic
A gentle surfactant and emulsifier that helps cleanse and stabilize formulas without stripping the skin.
Irritation
low
Source
semi-synthetic
Oleth-40 is a workhorse emulsifier that helps mix water and oil, but it may cause irritation for sensitive skin at higher concentrations.
Irritation
moderate
Source
synthetic
Oleth-44 is a gentle synthetic emulsifier that helps mix water and oil in creams and cleansers, with a low risk of irritation.
Irritation
low
Source
synthetic
Oleth-45 is a gentle synthetic emulsifier that helps mix water and oil in creams and lotions, with a low risk of irritation.
Irritation
low
Source
synthetic
Oleth-5 helps mix oil and water in your products, but it can be mildly irritating or pore-clogging for some skin types.
Irritation
moderate
Source
synthetic
Oleth-5 Phosphate is a gentle emulsifier that helps mix oil and water in products, with low irritation potential and a good safety profile for most skin types.
Irritation
low
Source
semi-synthetic
Oleth-50 is a synthetic emulsifier that helps blend oil and water in formulas, but it may cause irritation for sensitive skin at higher concentrations.
Irritation
moderate
Source
synthetic
Oleth-6 is a workhorse emulsifier that helps mix oil and water, but it may be mildly irritating or pore-clogging for sensitive or acne-prone skin.
Irritation
moderate
Source
synthetic
A gentle, effective cleansing ingredient that helps remove dirt and oil without stripping the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
Oleth-7 is a workhorse emulsifier that helps mix water and oil, but it may be slightly irritating or clog pores for some skin types.
Irritation
moderate
Source
synthetic