A mild, amino-acid-based surfactant that cleanses without stripping the skin barrier.
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 mild, amino-acid-based surfactant that cleanses without stripping the skin barrier.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that cleanses without stripping the skin, making it ideal for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, amino-acid-based cleanser that effectively removes dirt and oil while respecting the skin barrier.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that cleanses effectively while respecting the skin barrier, ideal for sensitive or dry skin.
Irritation
low
Source
natural
A mild, amino-acid-based cleanser that effectively removes dirt and oil while being gentle on the skin barrier.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based cleanser that effectively removes dirt and oil without stripping the skin's moisture barrier.
Irritation
low
Source
semi-synthetic
A gentle, amino-acid-based cleanser that effectively removes impurities while being kind to sensitive skin.
Irritation
low
Source
semi-synthetic
A gentle, silk-derived cleanser that effectively removes dirt and oil without disrupting the skin barrier.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that cleanses gently, making it ideal for sensitive or dry skin.
Irritation
low
Source
natural
A gentle, plant-derived cleansing ingredient that effectively removes dirt and oil without stripping the skin.
Irritation
low
Source
semi-synthetic
A gentle, amino-acid-based surfactant that cleanses effectively while being kind to sensitive and dry skin.
Irritation
low
Source
semi-synthetic
A gentle, sulfate-free surfactant that cleanses without stripping the skin barrier.
Irritation
low
Source
semi-synthetic
A gentle, phosphate-based surfactant that cleanses effectively with low irritation potential, making it a good choice for sensitive skin.
Irritation
low
Source
synthetic
Potassium Lauryl Sulfate is a strong cleanser that can effectively remove dirt and oil but may be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
Potassium Linoleate is an effective, gentle cleanser that helps remove dirt and oil, but may be drying for very sensitive or dry skin types.
Irritation
moderate
Source
semi-synthetic
A gentle, plant-derived cleansing agent that effectively removes impurities without stripping the skin's natural moisture barrier.
Irritation
low
Source
natural
A gentle mineral-amino acid blend that may help calm stressed skin and support natural hydration, though research is still emerging.
Irritation
low
Source
semi-synthetic
Potassium Metabisulfite is an effective preservative but can be a common allergen, especially for those with sulfite sensitivity.
Irritation
moderate
Source
synthetic
A gentle pH adjuster and stabilizer that helps keep your skincare formulas balanced and effective without causing irritation.
Irritation
low
Source
synthetic
A synthetic UVB filter that helps shield skin from sunburn, but its use is limited in some regions due to regulatory differences.
Irritation
low
Source
synthetic
A milder alternative to salicylic acid that exfoliates and brightens with a lower risk of irritation.
Irritation
low
Source
synthetic
A mild, sulfate-free surfactant that cleanses effectively without stripping the skin, making it ideal for sensitive and dry skin types.
Irritation
low
Source
semi-synthetic
A widely used preservative that prevents microbial growth, but has raised some safety concerns regarding potential endocrine disruption.
Irritation
low
Source
synthetic
Potassium monopersulfate is a strong oxidizer used mainly in hair lightening and disinfectant products; it is not a typical skincare ingredient and can be irritating.
Irritation
high
Source
synthetic
Potassium Myristate is an effective cleanser that creates rich lather, but it can be drying or irritating for sensitive or dry skin types.
Irritation
moderate
Source
synthetic
A mild, amino acid-based surfactant that cleanses effectively while respecting the skin barrier.
Irritation
low
Source
semi-synthetic
A mild, collagen-derived surfactant that cleanses gently and helps maintain skin softness, ideal for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that effectively cleanses while being gentle on the skin barrier.
Irritation
low
Source
semi-synthetic
A gentle, niacinamide-derived peptide that may help brighten skin and reduce signs of aging with low irritation risk.
Irritation
low
Source
semi-synthetic
Potassium nitrate is a well-studied ingredient for reducing tooth sensitivity, but it is not typically used in skincare.
Irritation
low
Source
natural
A synthetic preservative that helps keep products fresh but may cause irritation for sensitive skin at higher concentrations.
Irritation
moderate
Source
synthetic
A mild, well-tolerated preservative that helps keep your skincare products fresh and safe from spoilage.
Irritation
low
Source
synthetic
An effective cleansing agent that helps remove oil and dirt, but may be drying or irritating for very sensitive skin.
Irritation
moderate
Source
synthetic
Potassium oleate is an effective cleanser and emulsifier, but can be drying or irritating for sensitive skin due to its high pH.
Irritation
moderate
Source
semi-synthetic
A mild, collagen-derived surfactant that cleanses gently and leaves skin feeling soft, ideal for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, olive-oil-based cleanser that effectively removes dirt and oil without stripping the skin.
Irritation
low
Source
natural
A mild, plant-derived surfactant that cleanses without stripping the skin, suitable for sensitive and dry skin types.
Irritation
low
Source
natural
Surfactant
POTASSIUM OLIVOYL (ARGININE/GLUTAMIC ACID/ISOLEUCINE/LEUCINE/LYSINE/PHENYLALANINE/PROLINE/THREONINE/VALINE)
A mild, amino-acid-based surfactant from olive oil that cleanses gently and is well-tolerated by sensitive skin.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based cleanser that effectively removes dirt and oil while leaving skin soft and hydrated.
Irritation
low
Source
semi-synthetic
Surfactant
POTASSIUM OLIVOYL (ALANINE/ARGININE/ASPARAGINE/ASPARTIC ACID/GLUTAMIC ACID/ GLYCINE/ISOLEUCINE/LEUCINE/LYSINE/METHIONINE/PHENYLALANINE/PROLINE/SERINE/THREONINE/TRYPTOPHAN/TYROSINE/VALINE)
A mild, plant-based surfactant that effectively cleanses while respecting the skin barrier.
Irritation
low
Source
natural
A mild, amino-acid-based cleanser that effectively removes dirt and oil while leaving skin soft and hydrated.
Irritation
low
Source
semi-synthetic
A mild, olive-derived surfactant that cleanses effectively while respecting the skin barrier — ideal for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
Surfactant
POTASSIUM LAUROYL/OLIVOYL (ALANINE/ARGININE/ASPARAGINE/ASPARTIC ACID/GLUTAMIC ACID/LYCINE/ISOLEUCINE/LEUCINE/LYSINE/METHIONINE/PHENYLALANINE/PROLINE/SERINE/THREONINE/TRYPTOPHAN/TYROSINE/VALINE)
A mild, plant-derived surfactant that cleanses effectively while respecting the skin barrier — ideal for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that effectively cleanses while respecting the skin's natural moisture barrier.
Irritation
low
Source
semi-synthetic
Potassium oxide is a strong alkali rarely found in finished skincare; it is more relevant to soap chemistry than to leave-on products.
Irritation
high
Source
synthetic
Viscosity Controlling
POTASSIUM OXIDIZED MICROCRYSTALLINE CERA
A modified wax that helps thicken and stabilize products, generally considered safe and non-irritating for most skin types.
Irritation
low
Source
semi-synthetic
A natural soap-making ingredient that effectively cleanses but can be drying for some skin types.
Irritation
moderate
Source
natural
An effective but potentially drying cleanser derived from palm oil, best for normal to oily skin types.
Irritation
moderate
Source
natural
An effective cleanser that can be drying for some skin types, best suited for normal to oily skin in rinse-off products.
Irritation
moderate
Source
semi-synthetic
Conditioning agent
Potassium Palmitoyl Hydrolyzed Corn Protein
A mild, protein-based conditioning ingredient that adds softness and manageability without heavy buildup.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that cleanses without stripping the skin, making it ideal for sensitive and dry skin types.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based surfactant that cleanses without stripping the skin or hair, making it ideal for sensitive or dry types.
Irritation
low
Source
semi-synthetic
Conditioning Agent
Potassium Palmitoyl Hydrolyzed Sweet Almond Protein
A mild, protein-derived conditioning ingredient that helps soften and smooth skin and hair without heavy buildup.
Irritation
low
Source
semi-synthetic
A mild, protein-based surfactant that cleanses gently while helping hair and skin feel soft and conditioned.
Irritation
low
Source
semi-synthetic
Potassium Paraben is an effective preservative but has raised concerns about potential endocrine disruption, leading many brands to phase it out.
Irritation
low
Source
synthetic
A natural soap ingredient from peanut oil that cleanses effectively but may be drying or irritating for sensitive skin, and poses a risk for those with peanut allergies.
Irritation
moderate
Source
natural
A synthetic fluorinated ingredient that helps products spread evenly and resist water, but its environmental persistence raises concerns.
Irritation
low
Source
synthetic
Potassium Persulfate is a strong oxidizer used in hair bleach; it can cause skin and eye irritation and is not suitable for everyday skincare.
Irritation
high
Source
synthetic
Potassium Phenoxide is a synthetic preservative booster that helps keep products fresh, but may cause irritation in sensitive individuals at higher concentrations.
Irritation
moderate
Source
synthetic
A safe, synthetic pH adjuster that helps keep your skincare products stable and gentle on your skin.
Irritation
low
Source
synthetic