A synthetic molecule that may help calm skin and support collagen, but research is still early.
Irritation
low
Source
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 synthetic molecule that may help calm skin and support collagen, but research is still early.
Irritation
low
Source
synthetic
A synthetic compound that mimics natural peptides to help firm and smooth skin, but research is still emerging.
Irritation
low
Source
synthetic
A synthetic ingredient that aims to relax facial muscles and soften expression lines, offering a non-invasive alternative to injectables.
Irritation
low
Source
synthetic
A modern synthetic UV filter that provides broad-spectrum protection with low irritation potential, but its safety data is still emerging compared to older filters.
Irritation
low
Source
synthetic
A synthetic film-former that helps makeup and skincare stay put, but offers no active skin benefit.
Irritation
low
Source
synthetic
A synthetic cooling agent that creates a refreshing sensation on skin, commonly used in products for a 'cooling' feel without actual temperature change.
Irritation
low
Source
synthetic
A synthetic scent ingredient that adds a sweet floral note but offers no skincare benefits.
Irritation
low
Source
synthetic
Film Former
Butyldimethicone Methacrylate/Methyl Methacrylate Crosspolymer
A silicone-based film former that improves wear time and water resistance without feeling heavy or sticky.
Irritation
low
Source
synthetic
Film Former
Butyldimethiconyl Propoxyethylcarbamoylpropyl Silsesquioxane
A high-tech silicone that creates a flexible, breathable film on skin to improve product wear and water resistance without feeling heavy.
Irritation
low
Source
synthetic
Conditioning Agent
Butyldimoniumhydroxypropyl Butylglucosides Chloride
A gentle, sugar-derived conditioning ingredient that reduces static and improves softness without heavy buildup.
Irritation
low
Source
semi-synthetic
Surfactant
Butyldimoniumhydroxypropyl Laurylglucosides Chloride
A gentle, sugar-based surfactant that cleans without stripping and leaves skin or hair feeling soft.
Irritation
low
Source
semi-synthetic
Butylene carbonate is a synthetic solvent that helps dissolve other ingredients and adjust product feel, but it offers no direct skin benefit and is rarely used in leave-on skincare.
Irritation
low
Source
synthetic
A widely used, low-irritation humectant that helps products feel smooth and hydrating without being sticky.
Irritation
low
Source
synthetic
A gentle synthetic emollient that helps creams feel silky and spread easily without clogging pores.
Irritation
low
Source
synthetic
A gentle, coconut-derived emollient that softens skin without clogging pores, ideal for sensitive and dry skin types.
Irritation
low
Source
semi-synthetic
A gentle, non-greasy emollient that softens skin and improves product texture without clogging pores.
Irritation
low
Source
semi-synthetic
A lightweight synthetic emollient that softens skin without clogging pores, ideal for oil-free and non-greasy formulas.
Irritation
low
Source
synthetic
A synthetic emollient that softens skin and helps products spread smoothly, but may clog pores for some people.
Irritation
low
Source
synthetic
A gentle, lightweight emollient that helps soften skin and improve product texture without clogging pores.
Irritation
low
Source
synthetic
A gentle wax ester that helps thicken and stabilize creams and lip products without common irritation.
Irritation
low
Source
semi-synthetic
A synthetic emollient that softens skin but may clog pores for some people.
Irritation
low
Source
synthetic
A gentle synthetic emollient that helps soften skin and improve product texture without common irritation or clogging concerns.
Irritation
low
Source
synthetic
A gentle synthetic ester that helps other ingredients spread smoothly, but offers little direct skin benefit.
Irritation
low
Source
synthetic
A gentle, synthetic emollient that helps soften skin and stabilize formulas without heavy greasiness.
Irritation
low
Source
synthetic
A safe, synthetic film-former that helps products spread smoothly and stay put without clogging pores.
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 lightweight, non-greasy emollient that softens skin and improves product texture with low irritation potential.
Irritation
low
Source
synthetic
A gentle, biodegradable surfactant that cleanses effectively while being kind to sensitive skin.
Irritation
low
Source
semi-synthetic
Antistatic Agent
Butylglucosides Hydroxypropyltrimonium Chloride
A mild, plant-based conditioner that smooths hair and fights frizz without weighing it down.
Irritation
low
Source
semi-synthetic
Butylglycerin is a gentle, synthetic humectant that pulls moisture into the skin and improves product feel without common irritation.
Irritation
low
Source
synthetic
A plant-derived compound with promising anti-inflammatory and antioxidant potential, but research in topical cosmetics is still emerging.
Irritation
low
Source
natural
UV Absorber
P-TERT-BUTYL-ALPHA-METHYLHYDROCINNAMAL /METHYLANTHRANILATE SCHIFF BASE
A synthetic UV filter that helps stabilize sunscreen formulas and absorb UVA/UVB rays, but its use is limited by regulatory approval in some regions.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that helps soften skin without clogging pores.
Irritation
low
Source
synthetic
A lightweight, non-greasy fatty alcohol that helps dissolve other ingredients and leaves skin feeling smooth without clogging pores.
Irritation
low
Source
synthetic
A gentle, semi-synthetic wax that improves product texture and stability without common beeswax drawbacks.
Irritation
low
Source
semi-synthetic
A lightweight, non-greasy emollient that makes products feel silky and spread smoothly, with a very low risk of irritation or clogging pores.
Irritation
low
Source
synthetic
A lightweight, synthetic emollient that improves product texture and spreadability without clogging pores or feeling heavy.
Irritation
low
Source
synthetic
A gentle, plant-based wax ester that gives products a smooth, non-greasy feel and helps stabilize formulas.
Irritation
low
Source
natural
A lightweight, non-greasy emollient that helps products glide on and leaves skin feeling soft without clogging pores.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that improves product feel and skin softness with a low risk of irritation or clogged pores.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that spreads easily and is generally well-tolerated, making it a common choice for moisturizers and sunscreens.
Irritation
low
Source
synthetic
A safe, lightweight emollient that helps sunscreens feel silky and spread easily, but it's not an active sunscreen ingredient itself.
Irritation
low
Source
synthetic
Butyloxepanone is a synthetic fragrance ingredient that adds scent but offers no skincare benefits; it's generally safe at low levels but may cause irritation in sensitive individuals.
Irritation
low
Source
synthetic
Butylparaben is an effective preservative but has raised some safety concerns, leading to restricted use in certain regions.
Irritation
low
Source
synthetic
A synthetic ingredient that helps products feel silky and spread smoothly, with a good safety profile for most skin types.
Irritation
low
Source
synthetic
A synthetic ingredient that helps products feel smooth and silky, but it's not a star performer and is best understood as a texture helper.
Irritation
low
Source
synthetic
Skin brightening agent
T-BUTYLPHENYL IMIDAZOLYLPHENYL SULFONAMIDE
A synthetic brightener that works by blocking a key enzyme in melanin production, but it's less common than alternatives like vitamin C or niacinamide.
Irritation
low
Source
synthetic
Butylphthalide is a natural antioxidant from celery seed that may help calm skin and fight free radicals, but research in cosmetics is still limited.
Irritation
low
Source
natural
Butylphthalimide is a synthetic plasticizer that helps nail products stay flexible and resist chipping, but it has limited safety data and is best used in well-ventilated spaces.
Irritation
low
Source
synthetic
Butylquinoline is a synthetic fragrance ingredient that adds a distinctive leathery scent but may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A potent synthetic brightener that can fade dark spots but may cause irritation for sensitive skin.
Irritation
moderate
Source
synthetic
Butyraldehyde is a synthetic fragrance compound that adds a distinctive scent but can be a skin irritant for sensitive individuals.
Irritation
moderate
Source
synthetic
Butyric acid is an emerging skincare ingredient that may support a healthy skin microbiome, but research is still early and it can be irritating at higher concentrations.
Irritation
moderate
Source
natural
Butyrolactone is a synthetic solvent used mainly in nail products, but it has limited skincare benefits and may cause irritation at higher levels.
Irritation
moderate
Source
synthetic
Butyrolactone Thiol is a synthetic fragrance ingredient with limited safety data; it may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
Butyrophenone is a synthetic fragrance ingredient with limited safety data; it may cause skin irritation in sensitive individuals and is best avoided in leave-on products for reactive skin.
Irritation
moderate
Source
synthetic
A lab-made peptide that encourages collagen production, making it a gentle anti-aging option for most skin types.
Irritation
low
Source
synthetic
A lightweight, non-greasy emollient that helps products glide on smoothly without clogging pores.
Irritation
low
Source
synthetic
Butyrum is a natural butter that softens and protects skin, but its comedogenic potential depends on the specific plant source.
Irritation
low
Source
natural
A synthetic humectant that helps hydrate skin, but research on its long-term effects is still limited.
Irritation
low
Source
synthetic