A food-grade emulsifier that helps creams and lotions stay smooth and stable, with a low risk of irritation.
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 food-grade emulsifier that helps creams and lotions stay smooth and stable, with a low risk of irritation.
Irritation
low
Source
semi-synthetic
A stable, potent antioxidant derived from turmeric that may help brighten skin and fight free radicals, but human studies are limited.
Irritation
low
Source
semi-synthetic
Diallyl sulfide is a natural sulfur compound with antimicrobial potential, but its strong odor and limited skincare research make it a niche ingredient.
Irritation
moderate
Source
natural
Colorant
2,3-DIAMINODIHYDROPYRAZOLO PYRAZOLONE DIMETHOSULFONATE
A synthetic colorant for hair dyes that delivers intense color but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic peptide that may help firm skin and soften fine lines, with low irritation risk.
Irritation
low
Source
synthetic
A synthetic molecule that helps slow hair thinning by improving the anchoring of hair fibers in the scalp.
Irritation
low
Source
synthetic
Hair growth stimulant
Diaminopyrimidine Oxide Oxothiazolidinecarboxylate
A synthetic compound that may help reduce hair shedding and support thicker-looking hair by targeting follicle stem cells.
Irritation
low
Source
synthetic
Diammonium Citrate is a safe, low-irritation pH adjuster that helps keep your skincare products stable and gentle on skin.
Irritation
low
Source
synthetic
An effective but strong reducing agent for permanent hair restructuring; requires careful handling to avoid scalp irritation and hair damage.
Irritation
moderate
Source
synthetic
A behind-the-scenes stabilizer that helps keep your products fresh and effective by neutralizing trace metals.
Irritation
low
Source
synthetic
A gentle, sulfate-free surfactant that cleans without stripping the skin barrier, ideal for sensitive or dry skin.
Irritation
low
Source
semi-synthetic
A gentle, sulfate-free surfactant that cleanses effectively with low irritation potential, ideal for sensitive or dry skin.
Irritation
low
Source
synthetic
A gentle, sulfate-free surfactant that cleanses effectively while being kind to sensitive and dry skin types.
Irritation
low
Source
semi-synthetic
Diammonium phosphate is a safe, low-irritation pH adjuster that helps keep your products stable and effective, but it offers no direct skin benefit.
Irritation
low
Source
synthetic
A gentle, effective cleansing agent that creates foam without stripping the skin's natural moisture barrier.
Irritation
low
Source
synthetic
Diamylhydroquinone is a synthetic antioxidant that helps keep oils and lip products from going rancid, but it's not a star active for skin benefits.
Irritation
low
Source
synthetic
A natural, gritty powder that gently scrubs away dead skin and soaks up excess oil, but can be too harsh for sensitive or broken skin.
Irritation
moderate
Source
natural
An effective preservative that can release formaldehyde, making it a potential irritant for sensitive skin.
Irritation
moderate
Source
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, non-greasy emollient that helps products feel smooth and stay put without clogging pores.
Irritation
low
Source
synthetic
A gentle emulsifier and hair conditioner that helps create smooth, creamy textures in rinse-off and leave-on products.
Irritation
low
Source
synthetic
A gentle conditioning ingredient that reduces static and softens hair without heavy buildup.
Irritation
low
Source
synthetic
A gentle, effective conditioning ingredient that reduces static and improves manageability without heavy buildup.
Irritation
low
Source
synthetic
A gentle, synthetic conditioning ingredient that helps soften hair and reduce static without heavy buildup.
Irritation
low
Source
synthetic
Dibenzothiophene is a synthetic UV filter with limited safety data; it is not widely used in mainstream skincare and may cause irritation for sensitive skin.
Irritation
moderate
Source
synthetic
Dibenzyl is a synthetic solvent and fragrance ingredient with moderate irritation potential; it is not a primary active but may appear in small amounts in scented products.
Irritation
moderate
Source
synthetic
Dibenzyl Ether is a synthetic fragrance ingredient that adds a light floral note, but it offers no skincare benefits and may cause sensitivity in those with fragrance allergies.
Irritation
low
Source
synthetic
Dibenzylidene Sorbitol is a synthetic thickener that helps create smooth, non-greasy gels, but it has limited skin benefits and may feel heavy on some skin types.
Irritation
low
Source
synthetic
An effective preservative but may cause irritation in sensitive individuals, especially at higher concentrations.
Irritation
moderate
Source
synthetic
An effective preservative but can be irritating for sensitive skin; use is tightly regulated.
Irritation
moderate
Source
synthetic
Dibutoxymethane is a synthetic solvent that helps products spread and dry quickly, but it can be drying or irritating for sensitive skin.
Irritation
moderate
Source
synthetic
Dibutyl Adipate is a lightweight synthetic emollient that helps products glide on smoothly without clogging pores or feeling heavy.
Irritation
low
Source
synthetic
A synthetic film-former that helps makeup and sunscreen stay put longer, especially in water or sweat.
Irritation
low
Source
synthetic
Dibutyl Ethanolamine is a synthetic pH adjuster that helps balance product acidity, but it may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic gelling agent that creates elegant, clear gel textures with low irritation potential.
Irritation
low
Source
synthetic
A synthetic polymer that helps products stay put and resist water, but offers no active skincare benefit.
Irritation
low
Source
synthetic
A synthetic gelling agent that gives lip and stick products a smooth, clear, non-sticky texture without water.
Irritation
low
Source
synthetic
Dibutyl Maleate is a synthetic ingredient that helps products spread smoothly and resist water, but it has limited direct skin benefits and is best for those seeking long-wear or water-resistant formulas.
Irritation
low
Source
synthetic
A synthetic film-former that boosts water resistance and wear time in makeup and sunscreens, with a low risk of irritation.
Irritation
low
Source
synthetic
Dibutyl Oxalate is a synthetic solvent found mainly in nail products; it helps ingredients blend and dry, but there is limited safety data for leave-on skincare.
Irritation
moderate
Source
synthetic
Dibutyl Sebacate is a lightweight synthetic emollient that helps products spread smoothly and keeps nail polish flexible, but it has limited direct skin benefit.
Irritation
low
Source
synthetic
Dibutyl Sulfide is a synthetic fragrance ingredient with a strong, unpleasant odor at high concentrations, used in tiny amounts to add complexity to scents.
Irritation
moderate
Source
synthetic
A synthetic scent ingredient that adds a sweet, creamy note to products; generally considered safe at low concentrations but offers no skincare benefit.
Irritation
low
Source
synthetic
A synthetic humectant that helps hydrate skin, but research on its long-term benefits is still emerging.
Irritation
low
Source
synthetic
A synthetic film-former that helps makeup and sunscreen stay put longer, but it's not a hydrating or active ingredient.
Irritation
low
Source
synthetic
A synthetic ingredient that helps nail polish and lip products stay flexible and durable, but its safety profile is still being studied.
Irritation
low
Source
synthetic
A silky, non-greasy emollient that helps products glide on smoothly without clogging pores.
Irritation
low
Source
synthetic
A silky, non-greasy emollient that helps products spread smoothly and leaves skin feeling soft without clogging pores.
Irritation
low
Source
semi-synthetic
A lab-made peptide with antioxidant-like modifications that may help firm skin, but human studies are still limited.
Irritation
low
Source
synthetic
Dicalcium phosphate is a gentle, non-irritating abrasive commonly used in toothpaste and some skincare powders to help polish and clean without harshness.
Irritation
low
Source
natural
Film Former
DICAPROLACTONE ETHOXYACRYLATE/1,4-BUTANEDIOL/IPDI COPOLYMER
A synthetic film-former that helps makeup last longer and resist water, but may feel tight or heavy on very sensitive skin.
Irritation
low
Source
synthetic
A synthetic polymer that helps makeup last longer and resist water, but offers no skincare benefit.
Irritation
low
Source
synthetic
A silky, non-greasy emollient that helps skin feel soft and smooth, ideal for lightweight formulas.
Irritation
low
Source
synthetic
A gentle, effective surfactant that cleanses without over-drying, suitable for sensitive skin.
Irritation
low
Source
synthetic
A silky, non-greasy emollient that hydrates and softens skin while improving product texture.
Irritation
low
Source
semi-synthetic
A gentle synthetic conditioner that reduces static and softens hair without heavy buildup.
Irritation
low
Source
synthetic
A gentle amino-acid derivative that helps strengthen hair and support skin firmness without irritation.
Irritation
low
Source
synthetic
A silky, lightweight emollient that hydrates without clogging pores, ideal for oily and sensitive skin types.
Irritation
low
Source
natural
A gentle, fast-absorbing emollient that softens skin without clogging pores or leaving a heavy residue.
Irritation
low
Source
natural