Beauty ingredient research

Beauty ingredients explained in plain English

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

Showing 60 of 20,303
AllUV absorberUV filterabrasiveabsorbentacne treatmentactiveactive ingredientadhesivealkalizing agentamino acidanti-aginganti-androgenanti-cavityanti-cavity agentanti-inflammatoryanti-irritantanticariesanticavity agentantidandruffantifungalantimicrobialantioxidantantiperspirantantiplaqueastringentbarrier repairbarrier supportbarrier-repairbarrier-supportbinderbinding agentbiotechbiotechnologybond-builderbotanicalbotanical extractbotanical oilbotanical waterbrighteningbrightening agentbufferbuffering agentcell-communicating ingredientceramidechelating agentchemicalchemical intermediateclaycleansercleansingcleansing agentcolorantconditionerconditioningconditioning agentcooling agentcosmeticcosmetic additivecosmetic colorantcosmetic ingredientcosmetic pigmentcosmetic powdercosmetic-texturizercosmetic-waxcosmeticscrosslinking agentdelivery agentdelivery systemdenaturantdeodorantdeodorant agentdepigmenting agentdepilatorydepilatory agentdesensitizing agentdyedye intermediatedye precursordye-intermediateemollientemulsifierenzymeessential oilexfoliantexperimentaleyelashfermentfilm formerfilm-formerfilm-formingfilm-forming agentfirming agentfixativeflavoring agentformulationfragrancefragrance ingredientfunctional ingredientgashair carehair colorhair coloranthair conditionerhair dyehair removalhair-carehair-colorhaircarehumectantindustrialinsecticideintermediatelashlash carelash enhancerlash-and-browlip carelipidmakeupmarine extractmasking agentmicrobiomemicrobiome modulatormineralmoisturizernail carenail-careocclusiveoilopacifieropacifying agentoptical agentoral careotheroxidative dyeoxidative dye precursoroxidizing agentpH adjusterpain reliefpenetration enhancerpeptidepersonal careph adjusterpharmaceuticalpheromonepigmentplant oilplasticizerpolymerpolymer precursorprebioticprescription-drugpreservativepreservative boosterprobioticprocessing agentprocessing aidpropellantproteinpurifyingreducing agentretinoidscalp caresebum regulatorsebum-regulatorself-tannerself-tanningsensory additivesensory agentsensory modifiersiliconeskin barrierskin barrier supportskin conditionerskin conditioningskin conditioning agentskin lighteningskin protectantskin-conditioningskin-conditioning agentskin-identicalskin-identical ingredientskin-lighteningskin-lightening agentskincaresolventsoothingsoothing agentstabilizerstimulantsunscreensurfactantsyntheticsynthetic colorantsynthetic dyesynthetic resinsynthetic-coloranttexture enhancertexturizerthickenertoneruv-absorberuv-filtervasoactivevasodilatorviscosity controlviscosity controllingviscosity controlling agentvitaminwax

Anti-aging

Palmitoyl SH-Tripeptide-1 Amide

PALMITOYL SH-TRIPEPTIDE-1 AMIDE

4.0

A synthetic peptide that may help reduce the appearance of fine lines and improve skin firmness, but results are gradual and vary by person.

Irritation

low

Source

synthetic

beautyskincarepeptide
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Anti-Aging Agent

Palmitoyl SH-Tripeptide-2 Amide

Palmitoyl SH-Tripeptide-2 Amide

4.0

A synthetic peptide that may help reduce fine lines and improve skin firmness, but results vary and more human studies are needed.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Palmitoyl SH-Tripeptide-3 Amide

Palmitoyl SH-Tripeptide-3 Amide

4.3

A synthetic peptide that signals skin to produce more collagen, helping soften fine lines over time with minimal irritation.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Palmitoyl SH-Tripeptide-4 Amide

Palmitoyl SH-Tripeptide-4 Amide

4.0

A synthetic peptide that may help support collagen and improve skin firmness, but more human studies are needed.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Hair Conditioning Agent

Palmitoyl Silk Amino Acids

Palmitoyl Silk Amino Acids

4.0

A gentle, silk-derived conditioning agent that helps smooth hair and soften skin without heavy buildup.

Irritation

low

Source

semi-synthetic

beautyskincarehaircare
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Anti-Aging Agent

Palmitoyl Snail Oligopeptide-1

Palmitoyl Lysyl S-Snail Oligopeptide-1 Amide Acetate

4.0

A lab-made peptide that mimics snail proteins to help skin look firmer and smoother, but it's not a proven alternative to retinol or collagen injections.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tetrapeptide-10

Palmitoyl Tetrapeptide-10

4.0

A gentle peptide that may help soften fine lines by encouraging collagen production, but results are subtle and take time.

Irritation

low

Source

synthetic

beautyskincarepeptide
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Anti-aging agent

Palmitoyl Tetrapeptide-12

Palmitoyl Tetrapeptide-12

4.0

A gentle synthetic peptide that may help soften fine lines by signaling skin to produce more collagen, but results are subtle and require consistent use.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tetrapeptide-20

Palmitoyl Tetrapeptide-20

4.0

A gentle peptide that may help improve skin firmness and soften fine lines with consistent use.

Irritation

low

Source

synthetic

beautyskincarepeptide
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Anti-aging agent

Palmitoyl Tetrapeptide-50

Palmitoyl Tetrapeptide-50

4.0

A synthetic peptide that may help improve skin firmness and reduce fine lines, but more independent human studies are needed.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tetrapeptide-7

Palmitoyl Tetrapeptide-7

4.3

A well-studied peptide that helps calm skin and support collagen production, making it a gentle anti-aging workhorse.

Irritation

low

Source

synthetic

beautyskincarepeptide
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Anti-aging agent

Palmitoyl Tripeptide-1

Palmitoyl Tripeptide-1

4.3

A well-studied peptide that helps reduce fine lines by encouraging collagen production, but results are gradual and not dramatic.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-28

Palmitoyl Tripeptide-28

4.0

A signaling peptide that encourages your skin to act younger by boosting collagen, but results are gradual and subtle.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-29

Palmitoyl Tripeptide-29

4.2

A synthetic peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with consistent use.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-31

Palmitoyl Tripeptide-31

4.0

A gentle peptide that may help improve skin firmness and reduce fine lines with consistent use.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-36

Palmitoyl Tripeptide-36

4.0

A synthetic peptide that encourages collagen production, helping reduce fine lines and improve skin firmness with minimal irritation.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-37

Palmitoyl Tripeptide-37

4.0

A synthetic peptide that may help improve skin firmness and reduce fine lines, but results are gradual and vary by person.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Palmitoyl Tripeptide-38

Palmitoyl Tripeptide-38

4.3

A well-studied peptide that helps reduce fine lines and improve skin firmness with minimal irritation risk.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Palmitoyl Tripeptide-4

Palmitoyl Tripeptide-4

4.3

Palmitoyl Tripeptide-4 is a well-studied peptide that helps reduce fine lines and improve skin firmness by encouraging collagen production.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-Aging Agent

Palmitoyl Tripeptide-40

Palmitoyl Tripeptide-40

4.0

A synthetic peptide that encourages firmer, smoother skin by supporting collagen-building signals.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-42

Palmitoyl Tripeptide-42

4.2

A synthetic peptide that mimics natural signals to help skin look firmer and smoother over time.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-5

Palmitoyl Tripeptide-5

4.3

A well-tolerated peptide that may help reduce fine lines and improve skin firmness by encouraging collagen production.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-5 Nonapeptide-1 Complex

Palmitoyl SH-Tripeptide-5 Norisoleucyl SH-Nonapeptide-1

4.2

A synthetic peptide blend that may help soften fine lines and improve skin firmness with regular use, though results are gradual and not dramatic.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging

Palmitoyl Tripeptide-5 with Vitamin C

Palmitoyl Tripeptide-5 Amidopropyl Ascorbyl Phosphate HCl

4.0

A clever combo ingredient that pairs a collagen-boosting peptide with a stable form of vitamin C for dual anti-aging and antioxidant benefits.

Irritation

low

Source

semi-synthetic

beautyskincareantioxidantpeptide
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Anti-aging agent

Palmitoyl Tripeptide-52 Amide

Palmitoyl Tripeptide-52 Amide

4.0

A synthetic peptide that signals skin to produce more collagen, helping to smooth wrinkles and improve firmness with consistent use.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-53 Amide

Palmitoyl Tripeptide-53 Amide

4.0

A synthetic peptide that signals skin to produce more collagen, helping to smooth wrinkles and improve firmness with low irritation risk.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Palmitoyl Tripeptide-54 Amide

Palmitoyl Tripeptide-54 Amide

4.0

A synthetic peptide that signals skin to produce more collagen, helping reduce fine lines and improve firmness with low irritation risk.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-56

Palmitoyl Tripeptide-56

4.0

A promising synthetic peptide that may help firm skin and soften lines, though research is still emerging.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Palmitoyl Tripeptide-7

PALMITOYL TRIPEPTIDE-7 HCL

4.3

A well-tolerated peptide that helps reduce fine lines and support skin firmness by encouraging collagen production.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Soothing agent

Palmitoyl Tripeptide-8

Palmitoyl Tripeptide-8

4.0

A synthetic peptide that helps calm visible skin reactivity and supports a more resilient-looking complexion over time.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Skin conditioning agent

Palmitoyl Tryptamine

Palmitoyl Tryptamine

3.5

Palmitoyl Tryptamine is a synthetic peptide-like compound that may help support skin firmness and reduce fine lines, but research is still emerging and it is less common than more established peptides.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Antioxidant

Palo Santo Extract

BULNESIA SARMIENTOI EXTRACT

3.8

A fragrant botanical extract with antioxidant potential, but limited research on its specific cosmetic benefits.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Palo Santo Wood Extract

Eysenhardtia polystachya wood extract

3.8

A gentle, antioxidant-rich botanical extract that may help calm skin and fight environmental stress, though research is still emerging.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Panax Notoginseng Root Powder

PANAX NOTOGINSENG ROOT POWDER

4.0

A gentle botanical powder that may help calm redness and defend against environmental stress, but its benefits are not as well-studied as some other plant extracts.

Irritation

low

Source

natural

beautyskincarebotanical
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Exfoliant

Pancreatin

PANCREATIN

3.5

Pancreatin is a gentle enzyme exfoliant that helps soften and smooth skin by breaking down dead skin cells, but it's less common and less studied than other exfoliating enzymes.

Irritation

low

Source

natural

beautyskincareexfoliant
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Antioxidant

Pandan Bract Extract

Pandanus Odoratissimus Bract Extract

3.8

Pandan bract extract is a gentle, fragrant botanical with antioxidant potential, but research on its skincare benefits is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Fragrance

Pandan Leaf Oil

PANDANUS ODORATISSIMUS OIL

3.8

Pandan leaf oil adds a pleasant natural fragrance and mild antioxidant benefits, but its strong aroma and limited research mean it's best for those who enjoy botanical scents and have no fragrance sensitivities.

Irritation

moderate

Source

natural

beautyskincarefragrance
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Antioxidant

Pandan Seed Extract

Pandanus Odoratissimus Seed Extract

3.8

A gentle, plant-based antioxidant extract that may help calm skin and fight free radical damage, though research is still early.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Pandan Stamen Extract

Pandanus Odoratissimus Stamen Extract

3.8

A gentle, aromatic plant extract with antioxidant potential, but limited research on its specific benefits for skin.

Irritation

low

Source

natural

beautyskincareantioxidant
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Antioxidant

Panduratin A

Panduratin A

3.8

A plant-derived compound with promising antioxidant and anti-inflammatory effects, but human skincare research is still limited.

Irritation

low

Source

natural

beautyskincareantioxidant
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Emollient

Pangium Edule Kernel Oil

Pangium Edule Kernel Oil

3.8

A gentle, plant-based oil that hydrates and softens skin, but scientific research on its specific benefits is still limited.

Irritation

low

Source

natural

beautyskincareemollient
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Soothing Agent

Pantetheine Sulfonate

Pantetheine Sulfonate

4.0

A gentle, vitamin B5-derived ingredient that helps calm irritation and support the skin barrier — a good option for sensitive or reactive skin.

Irritation

low

Source

semi-synthetic

beautyskincaresoothing agent
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Humectant

Pantethine

Pantethine

4.0

Pantethine is a gentle, moisturizing derivative of vitamin B5 that helps support the skin barrier and calm irritation.

Irritation

low

Source

semi-synthetic

beautyskincarehumectantsoothing
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Humectant

Panthenol

Panthenol

4.5

Panthenol is a well-tolerated humectant that helps hydrate and soothe the skin while supporting the skin barrier.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Humectant

Panthenyl Ethyl Ether

Panthenyl Ethyl Ether

4.0

Panthenyl Ethyl Ether is a gentle, modified form of vitamin B5 that helps hydrate and condition skin without the stickiness of traditional humectants.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Humectant

Panthenyl Ethyl Ether Acetate

Panthenyl Ethyl Ether Acetate

4.0

A gentle, advanced version of panthenol that helps hydrate and soothe skin with better absorption than standard pro-vitamin B5.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Skin conditioning agent

Panthenyl Ethyl Ether Benzoate

Panthenyl Ethyl Ether Benzoate

3.8

A gentle, modified form of vitamin B5 that helps condition skin and hair with a silky feel, but research on this specific derivative is limited.

Irritation

low

Source

semi-synthetic

beautyskincareconditioning agent
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Skin conditioning agent

Pantoea Agglomerans Ferment Lysate

PANTOEA AGGLOMERANS FERMENT LYSATE EXTRACT

4.0

A gentle, microbiome-friendly ingredient that may help calm sensitive skin and strengthen the skin barrier, though research is still early.

Irritation

low

Source

biotech

beautyskincaremicrobiome
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Soothing Agent

Pantoea Vagans Ferment Filtrate

PANTOEA VAGANS FERMENT FILTRATE EXTRACT

3.8

A gentle, probiotic-based ingredient that may help calm skin and support a balanced microbiome, though research is still early.

Irritation

low

Source

biotech

beautyskincaresoothing agent
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Humectant

Pantolactone

Pantolactone

4.0

Pantolactone is a gentle humectant that helps skin retain moisture and improves product texture, but it's less studied than its parent compound, panthenol.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Humectant

Pantothenamide MEA

Pantothenamide MEA

4.0

Pantothenamide MEA is a gentle, vitamin B5-derived humectant that helps hydrate and soothe the skin without common irritation.

Irritation

low

Source

semi-synthetic

beautyskincarehumectant
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Humectant

Pantothenic Acid

Pantothenic Acid

4.0

Pantothenic acid is a gentle, water-soluble vitamin that helps hydrate and soothe the skin, making it a solid choice for most skin types, especially dry or sensitive skin.

Irritation

low

Source

natural

beautyskincarehumectant
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Skin conditioning agent

Pantothenoyl Dipeptide-13

Pantothenoyl Dipeptide-13

4.0

A synthetic peptide that pairs vitamin B5 with amino acids to help strengthen the skin barrier and improve hydration, though research is still emerging.

Irritation

low

Source

synthetic

beautyskincarepeptide
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Exfoliant

Papain

Papain

4.0

Papain is a gentle enzyme exfoliant from papaya that helps soften and smooth skin by dissolving dead cells, but it can be irritating for sensitive skin if overused.

Irritation

moderate

Source

natural

beautyskincareexfoliant
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Exfoliant

Papain Beta-Glucan

Papain, Beta-Glucan

3.8

A dual-action ingredient that gently exfoliates dead skin cells while helping to calm and hydrate the skin.

Irritation

moderate

Source

mixed

beautyskincareexfolianthumectant
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Exfoliant

Papain Crosspolymer

Carbomer/Papain Crosspolymer

4.0

A gentle enzyme exfoliant that helps smooth skin without harsh scrubbing, but may not be suitable for very sensitive or compromised skin.

Irritation

low

Source

semi-synthetic

beautyskincareexfoliant
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Exfoliant

Papaya Ferment Extract

LACTOBACILLUS/PAPAYA FRUIT FERMENT EXTRACT

4.0

A gentle, probiotic-based exfoliant that brightens and hydrates without harsh chemicals.

Irritation

low

Source

biotech

beautyskincareexfolianthumectant
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