A gentle, modified collagen that helps hydrate and smooth skin without the stickiness of plain collagen.
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, modified collagen that helps hydrate and smooth skin without the stickiness of plain collagen.
Irritation
low
Source
semi-synthetic
A gentle, protein-based ingredient that helps repair and strengthen damaged hair without weighing it down.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
CAPRYLOYL METHIONINE/SILK AMINO ACIDS METHYL ESTERS
A gentle, amino-acid-based conditioner that softens hair and skin without weighing them down.
Irritation
low
Source
semi-synthetic
Caprylyl Pyrrolidone is a gentle synthetic ingredient that helps other active ingredients absorb better while leaving skin feeling soft and smooth.
Irritation
low
Source
synthetic
Carnitine Tartrate is a gentle, multi-tasking ingredient that helps balance oil production, supports skin barrier health, and offers antioxidant protection.
Irritation
low
Source
semi-synthetic
A gentle, plant-based conditioning ingredient that makes hair smoother and easier to manage, ideal for sensitive scalps.
Irritation
low
Source
semi-synthetic
Caviar extract is a nutrient-rich ingredient that may help hydrate and condition skin, but its benefits are largely anecdotal and backed by limited clinical research.
Irritation
low
Source
natural
Cetealkonium bromide is an effective conditioning and antimicrobial ingredient, but it can be irritating for sensitive skin and is best used in rinse-off formulas.
Irritation
moderate
Source
synthetic
Antistatic Agent
CETEARAMIDOETHYL DIETHONIUM HYDROLYZED RICE PROTEIN
A gentle, protein-derived conditioning ingredient that reduces static and improves hair feel without heavy buildup.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
CETEARAMIDOETHYL DIETHONIUM HYDROLYZED WHEAT PROTEIN
A gentle, protein-derived conditioning agent that helps reduce frizz and static without heavy buildup.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
CETEARAMIDOETHYL DIETHONIUM ISOSTEAROYL HYDROLYZED SILK
A gentle conditioning ingredient derived from silk that helps smooth hair and soften skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Hair conditioning agent
CETEARAMIDOETHYLDIETHONIUM SUCCINOYL HYDROLYZED PEA PROTEIN
A gentle, plant-derived conditioning ingredient that helps repair and protect hair without weighing it down.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
CETEARAMIDOETHYLDIETHONIUM SUCCINOYL HYDROLYZED SILK
A gentle, silk-derived conditioning ingredient that adds softness and shine to hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Antistatic Agent
CETEARAMIDOPROPYL LAUROYLETHYLDIMONIUM METHOSULFATE
A gentle conditioning ingredient that helps detangle hair and reduce frizz without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle conditioning ingredient that helps soften hair and reduce static without heavy buildup.
Irritation
low
Source
semi-synthetic
Conditioning agent
CETRIMONIUM DIMETHICONE PEG-8 OLIVATE/SUCCINATE
A gentle, multi-tasking conditioning ingredient that smooths hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Cetrimonium tosylate is a synthetic conditioning agent that reduces static and softens hair, but may cause mild irritation for sensitive skin.
Irritation
moderate
Source
synthetic
Antistatic Agent
Cetyl Pyrrolidonylmethyl Dimonium Chloride
A synthetic conditioning ingredient that helps detangle and soften hair, but may feel heavy on fine hair.
Irritation
low
Source
synthetic
Hair Conditioner
Cetyl Triethylmonium Dimethicone PEG-8 Succinate
A gentle silicone derivative that smooths hair and fights frizz, but may build up on fine or low-porosity hair over time.
Irritation
low
Source
semi-synthetic
Film Former
Chitosan Rice Branamide Hydroxypropyltrimonium Chloride
A gentle conditioning ingredient that forms a protective film on hair, reducing frizz and improving softness without heavy buildup.
Irritation
low
Source
semi-synthetic
A PEG-modified form of vitamin D3 that may support skin barrier function, but research is limited and the ingredient is uncommon in mainstream products.
Irritation
low
Source
semi-synthetic
A gentle, biotech-derived ferment that may help calm and condition skin, but research is still early.
Irritation
low
Source
biotech
A gentle conditioning ingredient that helps smooth hair and reduce static, with a mild cinnamon-derived scent.
Irritation
low
Source
semi-synthetic
Conditioning Agent
Cocamidopropyl Dimethylamine Dihydroxymethylpropionate
A gentle, coconut-derived conditioning ingredient that softens hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
COCAMIDOPROPYL DIMETHYLAMINOHYDROXYPROPYL HYDROLYZED COLLAGEN
A gentle conditioning ingredient that combines collagen's moisturizing benefits with mild cleansing properties, but its complex name can be misleading.
Irritation
low
Source
semi-synthetic
Conditioning Agent
COCAMIDOPROPYLDIMONIUM HYDROXYPROPYL HYDROLYZED COLLAGEN
A gentle conditioning ingredient that helps detangle hair and soften skin without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle, coconut-derived conditioning ingredient that helps detangle and soften hair without heavy buildup.
Irritation
low
Source
semi-synthetic
Hair Conditioner
Cocamidopropyltrimonium Dimethicone PEG-8 Succinate
A gentle silicone-based conditioner that smooths hair and reduces frizz without heavy buildup, but may not suit very fine or low-porosity hair.
Irritation
low
Source
semi-synthetic
Conditioning Agent
Laurdimoniumhydroxypropyl Coco-Glucosides Chloride
A gentle, plant-derived conditioning ingredient that makes hair feel softer and reduces frizz without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle, coconut-derived conditioner that helps reduce static and soften hair without heavy buildup.
Irritation
low
Source
semi-synthetic
A synthetic conditioning agent that reduces static and softens hair, but may cause irritation for sensitive scalps.
Irritation
moderate
Source
synthetic
Hair Conditioning Agent
Cocodimonium Hydroxypropyl Hydrolyzed Casein
A gentle conditioning protein that helps hair feel softer and more manageable, but may not suit protein-sensitive hair types.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
COCODIMONIUM HYDROXYPROPYL HYDROLYZED HAIR KERATIN
A gentle, protein-based conditioner that helps repair and protect hair without weighing it down.
Irritation
low
Source
semi-synthetic
Hair Conditioner
COCODIMONIUM HYDROXYPROPYL HYDROLYZED KERATIN
A gentle, protein-based conditioning ingredient that helps repair and protect hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
Cocodimonium Hydroxypropyl Hydrolyzed Rice Protein
A mild, plant-derived conditioning ingredient that helps soften and detangle hair while reducing static and frizz.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
Cocodimonium Hydroxypropyl Hydrolyzed Silk
A gentle, silk-derived conditioning agent that helps soften hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
Cocodimonium Hydroxypropyl Hydrolyzed Soy Protein
A gentle, protein-derived conditioning ingredient that helps soften hair and skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Conditioning Agent
Cocodimonium Hydroxypropyl Hydrolyzed Wheat Protein
A mild, protein-based conditioner that helps hair feel soft and smooth without weighing it down.
Irritation
low
Source
semi-synthetic
Hair Conditioner
COCODIMONIUM HYDROXYPROPYL SILK AMINO ACIDS
A gentle, plant-derived conditioning ingredient that makes hair feel soft and smooth without heavy buildup.
Irritation
low
Source
semi-synthetic
A gentle, coconut-derived conditioner that reduces static and softens hair without heavy buildup.
Irritation
low
Source
semi-synthetic
A mild, protein-based conditioning ingredient that temporarily smooths hair and softens skin without heavy buildup.
Irritation
low
Source
semi-synthetic
Cocoyl hydrolyzed keratin is a gentle, protein-rich conditioner that helps strengthen and smooth hair without weighing it down.
Irritation
low
Source
semi-synthetic
Colostrum is a nutrient-rich ingredient that may help soothe and condition the skin, but research on its cosmetic benefits is still limited.
Irritation
low
Source
natural
Colostrum extract is a gentle, nutrient-dense ingredient that may support skin hydration and barrier comfort, but research is still emerging.
Irritation
low
Source
natural
Cytosine is a DNA building block with emerging research in skincare, but its benefits are not yet well-established for topical use.
Irritation
low
Source
natural
A synthetic ingredient that may boost eyelash growth but carries significant irritation and safety concerns, including potential eye and skin reactions.
Irritation
high
Source
synthetic
Decyloxyacetaldehyde is a synthetic ingredient that may help improve skin texture, but research is limited and it can be irritating for sensitive skin.
Irritation
moderate
Source
synthetic
Deer blood extract is a niche ingredient with traditional use but minimal modern research to support its cosmetic benefits.
Irritation
moderate
Source
natural
A protein-rich powder that can help condition skin and hair, but its benefits are not well-studied in modern cosmetics.
Irritation
low
Source
natural
A biotech ingredient that provides a complex blend of nutrients to support skin cell function, but its benefits in finished products are still being studied.
Irritation
low
Source
biotech
An emerging semi-synthetic ingredient that may help support skin barrier function, but research is still limited.
Irritation
low
Source
semi-synthetic
Hair Conditioning Agent
DIBEHENAMIDOPROPYLDIMETHYLAMINE DILINOLEATE
A gentle synthetic conditioner that helps detangle hair and soften skin without heavy buildup.
Irritation
low
Source
synthetic
A mild, plant-derived conditioning ingredient that smooths hair without heavy buildup, suitable for fine or sensitive hair.
Irritation
low
Source
semi-synthetic
A gentle, effective conditioning ingredient that reduces static and improves manageability without heavy buildup.
Irritation
low
Source
synthetic
A gentle synthetic conditioner that reduces static and softens hair without heavy buildup.
Irritation
low
Source
synthetic
A gentle synthetic conditioner that reduces static and softens hair without heavy buildup, but may not suit very fine or oily hair types.
Irritation
low
Source
synthetic
Antistatic Agent
Dicocoylethyl Hydroxyethylmonium Methosulfate
A mild, coconut-derived conditioning ingredient that smooths hair and reduces static without weighing it down.
Irritation
low
Source
semi-synthetic
Diethyl Aspartate is a gentle synthetic ingredient that helps skin feel smooth and conditioned, but research on its long-term benefits is still limited.
Irritation
low
Source
synthetic
A synthetic conditioning agent that can improve texture but may be irritating or clog pores for some skin types.
Irritation
moderate
Source
synthetic
Diglycol Guanidine Succinate is a synthetic conditioning agent that helps improve the feel and mildness of skincare and haircare products, but research on its long-term effects is limited.
Irritation
low
Source
synthetic