A gentle, amino-acid-based surfactant that cleanses without stripping, making it a good choice for sensitive or dry skin and hair.
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, amino-acid-based surfactant that cleanses without stripping, making it a good choice for sensitive or dry skin and hair.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based cleanser derived from rice protein that effectively cleanses without stripping the skin barrier.
Irritation
low
Source
semi-synthetic
A mild, protein-derived surfactant that cleans gently and helps maintain skin and hair softness.
Irritation
low
Source
semi-synthetic
A mild, protein-based surfactant that cleanses without stripping and helps reinforce hair strength.
Irritation
low
Source
semi-synthetic
A mild, coconut-derived surfactant that cleanses without stripping, with added conditioning benefits from oat protein.
Irritation
low
Source
semi-synthetic
A mild, amino-acid-based cleanser that cleans without stripping the skin, making it ideal for sensitive or dry skin types.
Irritation
low
Source
semi-synthetic
A mild, protein-enriched cleanser that helps clean hair and skin while leaving them feeling soft and less stripped.
Irritation
low
Source
semi-synthetic
A synthetic polymer that helps makeup and sunscreen stay put longer by forming a flexible, water-resistant film.
Irritation
low
Source
synthetic
A synthetic polymer that helps products stay put by forming a flexible, water-resistant film on skin or hair.
Irritation
low
Source
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 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
A gentle film-forming ingredient from seaweed that helps soothe and protect skin and hair without clogging pores.
Irritation
low
Source
semi-synthetic
Surfactant
POTASSIUM UNDECYLENOYL HYDROLYZED RICE PROTEIN
A mild, plant-derived surfactant that cleanses gently and is well-tolerated by sensitive skin.
Irritation
low
Source
semi-synthetic
Film Former
Ethyltrimonium Chloride Methacrylate/Hydrolyzed Potato Protein Copolymer
A gentle, protein-based conditioning ingredient that helps detangle hair and add softness without heavy buildup.
Irritation
low
Source
semi-synthetic
A mild synthetic ingredient that helps products feel silky and spread easily, but offers no active skincare benefits.
Irritation
low
Source
synthetic
A gentle, plant-derived conditioning ingredient that helps detangle hair and improve manageability without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle, modified cellulose that helps condition hair and skin by forming a lightweight, non-greasy film.
Irritation
low
Source
semi-synthetic
A synthetic conditioning agent that helps reduce static and soften hair, generally considered safe at low concentrations.
Irritation
low
Source
synthetic
A synthetic conditioning ingredient that can improve hair feel but may cause irritation or clog pores for some skin types.
Irritation
moderate
Source
synthetic
A gentle, semi-synthetic polymer that helps condition hair and improve product texture without heavy buildup.
Irritation
low
Source
semi-synthetic
A mild synthetic ingredient that helps hair feel soft and smooth, but it's not a star player and is best understood as part of a larger formula.
Irritation
low
Source
synthetic
A synthetic conditioning agent that can improve hair feel but may cause irritation or clog pores for some.
Irritation
moderate
Source
semi-synthetic
A gentle synthetic conditioning agent that helps reduce static and smooth hair without heavy buildup.
Irritation
low
Source
synthetic
A synthetic polymer that helps products stay put, resist water, and feel lightweight, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A gentle, soy-derived conditioning ingredient that helps soften skin and hair without clogging pores or causing irritation.
Irritation
low
Source
semi-synthetic
A conditioning ingredient that can improve hair manageability but may be irritating or comedogenic for some.
Irritation
moderate
Source
semi-synthetic
A synthetic conditioning ingredient that helps reduce static and soften hair, but offers no active skincare benefits.
Irritation
low
Source
synthetic
A synthetic film-former that helps products stay put and resist water, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A gentle synthetic polymer that improves product feel and helps lock in moisture without clogging pores.
Irritation
low
Source
synthetic
A gentle synthetic polymer that helps hair feel smooth and products spread evenly, but offers no active skincare benefits.
Irritation
low
Source
synthetic
A synthetic conditioning ingredient that helps reduce static and soften hair, but may cause buildup with frequent use.
Irritation
low
Source
synthetic
An effective hair conditioner and antistatic agent, but may cause irritation or clog pores in sensitive individuals.
Irritation
moderate
Source
synthetic
A lightweight silicone that gives a smooth, silky feel without clogging pores or causing irritation.
Irritation
low
Source
synthetic
Film Former
PROPYLTRIMONIUMCHLORIDE ACRYLAMIDE/DIMETHYLACRYLAMIDE COPOLYMER
A synthetic polymer that coats hair and skin to reduce frizz, improve slip, and lock in moisture without heavy buildup.
Irritation
low
Source
synthetic
A gentle, modified collagen that adds slip and softness to hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle, plant-derived conditioning ingredient that adds softness and manageability to hair and a smooth feel to skin.
Irritation
low
Source
semi-synthetic
Hair conditioning agent
PROPYLTRIMONIUM HYDROLYZED WHEAT PROTEIN
A gentle, positively charged wheat protein that coats hair to improve softness, manageability, and shine without heavy buildup.
Irritation
low
Source
semi-synthetic
PVP is a safe, synthetic film-former that helps products stay put and feel smooth, but it can feel stiff or tacky in high concentrations.
Irritation
low
Source
synthetic
A reliable synthetic polymer that gives hair hold and flexibility without heavy buildup.
Irritation
low
Source
synthetic
A synthetic polymer that helps products stay put, but offers no skincare benefit and may feel stiff on some hair types.
Irritation
low
Source
synthetic
A synthetic ingredient that may help slow hair thinning by reducing collagen buildup around hair follicles, but results vary and it works best as part of a comprehensive hair care routine.
Irritation
low
Source
synthetic
Quaternium-14 is an effective preservative and antistatic agent, but its potential for skin irritation means it is best suited for rinse-off products.
Irritation
moderate
Source
synthetic
A synthetic conditioning ingredient that reduces static and softens hair, but may cause buildup with frequent use.
Irritation
low
Source
synthetic
A synthetic conditioning ingredient that helps reduce static and improve manageability, but may be too heavy for fine or acne-prone skin.
Irritation
low
Source
synthetic
Quaternium-22 is a gentle conditioning ingredient that reduces static and improves feel in hair and skin products, with a low risk of irritation.
Irritation
low
Source
synthetic
Quaternium-24 is a gentle conditioning ingredient that helps reduce frizz and static without heavy buildup.
Irritation
low
Source
synthetic
Quaternium-27 is a mild conditioning ingredient that helps detangle hair and reduce static, but it may not suit very fine or easily weighed-down hair types.
Irritation
low
Source
synthetic
Quaternium-30 is a synthetic conditioning ingredient that helps reduce frizz and static in hair while adding a silky feel, but it may not suit those avoiding silicones or heavy polymers.
Irritation
low
Source
synthetic
Quaternium-33 is a synthetic conditioning ingredient that helps reduce static and improve manageability, but it may cause irritation for sensitive skin or clog pores in some people.
Irritation
moderate
Source
synthetic
Quaternium-45 is a synthetic conditioning ingredient that reduces static and improves manageability in hair products, with a low risk of irritation.
Irritation
low
Source
synthetic
Quaternium-51 is a gentle synthetic conditioner that helps reduce static and improve the feel of hair and skin without heavy buildup.
Irritation
low
Source
synthetic
Quaternium-52 is a gentle synthetic conditioner that reduces frizz and static without heavy buildup, but it offers no active skincare benefits.
Irritation
low
Source
synthetic
A gentle synthetic conditioner that helps detangle hair and reduce flyaways without heavy buildup.
Irritation
low
Source
synthetic
Quaternium-56 is a synthetic conditioning agent that reduces static and improves hair feel, but its benefits are mostly cosmetic and temporary.
Irritation
low
Source
synthetic
Quaternium-60 is a synthetic conditioning agent that reduces static and improves manageability in hair products, with a low risk of irritation for most users.
Irritation
low
Source
synthetic
A gentle conditioning ingredient that helps reduce static and improve manageability in hair products, with a low risk of irritation.
Irritation
low
Source
synthetic
A gentle synthetic conditioner that helps detangle hair and reduce frizz without heavy buildup.
Irritation
low
Source
synthetic
Quaternium-71 is a gentle synthetic conditioner that helps detangle hair and soften skin without heavy buildup.
Irritation
low
Source
synthetic