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 612
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 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-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

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-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-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 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-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 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-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

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

Skin conditioning agent

Pea Phytoplacenta Conditioned Media

Pisum Sativum (Pea) Phytoplacenta Conditioned Media

4.0

A gentle, plant-derived ferment that mimics the regenerative properties of animal placenta without the ethical or safety concerns.

Irritation

low

Source

biotech

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Pentapeptide-33

Pentapeptide-33

4.0

Pentapeptide-33 is a lab-made peptide that signals skin to look firmer and smoother, but it works gradually and results vary.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-34

Pentapeptide-34

4.0

Pentapeptide-34 is a lab-made peptide that signals skin to produce more collagen, helping to smooth fine lines and improve firmness over time.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-41

Pentapeptide-41

4.0

A synthetic peptide that may help firm skin and soften lines, but research is still emerging compared to better-studied peptides.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-43

Pentapeptide-43

4.0

A lab-made peptide that may help support skin firmness and reduce the look of fine lines, with a good safety profile.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-45

Pentapeptide-45

4.0

Pentapeptide-45 is a lab-made peptide that may help firm skin and soften fine lines, but research is still emerging and results vary.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-48

Pentapeptide-48

4.0

A synthetic peptide that may help smooth fine lines and improve skin firmness with consistent use, though more independent research is needed.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-49

Pentapeptide-49

4.0

Pentapeptide-49 is a lab-made peptide that may help firm skin and soften fine lines by encouraging collagen, but research is still emerging.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-5

Pentapeptide-5

4.0

Pentapeptide-5 is a synthetic peptide that may help reduce fine lines and improve skin firmness, but results are gradual and vary by person.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-52

Pentapeptide-52

4.0

Pentapeptide-52 is a lab-made peptide that may help smooth wrinkles and improve skin firmness, but research is still emerging compared to well-studied peptides.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-53

Pentapeptide-53

4.0

A synthetic peptide that may help soften fine lines and improve skin firmness, with low irritation risk.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-56

Pentapeptide-56

4.0

A synthetic peptide that may help smooth fine lines and improve skin firmness, but research is still emerging.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Pentapeptide-56 Dimer

Pentapeptide-56 Dimer

4.0

A lab-made peptide that may help firm skin and soften lines, but human research is still limited.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-57

Pentapeptide-57

4.0

Pentapeptide-57 is a lab-made peptide that may help smooth fine lines and support collagen, but research is still emerging and results vary.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging

Pentapeptide-57 Dimer

Pentapeptide-57 Dimer

4.0

A lab-made peptide that aims to mimic natural signaling to help skin look firmer and smoother over time.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-59

Pentapeptide-59

4.0

A lab-made peptide that may help reduce fine lines by encouraging collagen, but results are gradual and vary by person.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Pentapeptide-62

Pentapeptide-62

4.0

Pentapeptide-62 is a lab-made 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

Peptide Complex

Pentapeptide-60, S-Methanocaldococcus Jannaschii Heptapeptide-1

4.0

A peptide duo that may help improve skin firmness and reduce fine lines, but human studies are limited.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Skin conditioning agent

Peptide Complex with Thermophilus Ferment

Octapeptide-22, R-Thermus Thermophilus Putative Esterase, Hexapeptide-40

3.8

A cutting-edge peptide and ferment blend that may support skin firmness, but its unique ingredients lack broad independent research.

Irritation

low

Source

mixed

beautyskincareanti-aging
Read ingredient review

Skin conditioning agent

Piperazine Bisferulate

PIPERAZINE BISFERULATE

3.8

A synthetic ingredient that may help improve skin firmness and reduce fine lines, but research is still limited compared to more established anti-aging ingredients.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Skin conditioning agent

PNA-8 Carboxyethyl Fluorene

PNA-8 Carboxyethyl Fluorene

3.8

A synthetic peptide-like ingredient that may help improve skin firmness and elasticity, but research is still emerging.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Skin conditioning agent

Potato SH-Polypeptide-11

POTATO SH-POLYPEPTIDE-11

3.8

A gentle, plant-derived peptide that may help support skin structure, but research is still limited.

Irritation

low

Source

biotech

beautyskincareanti-aging
Read ingredient review

Skin conditioning agent

Pregnadienol

PREGNADIENOL

3.0

Pregnadienol is a synthetic steroid-like ingredient that may help smooth skin, but its safety and effectiveness are not well-established by independent research.

Irritation

moderate

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Pyroglutamyl Dipeptide-30 Amide

Pyroglutamyl Dipeptide-30 Amide

4.0

A synthetic peptide that may help improve skin firmness and reduce fine lines, but more independent research is needed.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Quinoyl Tripeptide-7

Quinoyl Tripeptide-7

4.0

A synthetic peptide that may help firm skin and soften wrinkles, but research is still emerging.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

R-Salmon Oligopeptide-1

R-Salmon Oligopeptide-1

3.8

A promising but under-researched peptide that may support collagen and skin repair, but lacks robust human studies.

Irritation

low

Source

semi-synthetic

beautyskincareanti-aging
Read ingredient review

Skin conditioning agent

R-Spider Polypeptide-3

R-Spider Polypeptide-3

3.5

A synthetic peptide that may help firm and smooth skin, but research is still early and benefits are not guaranteed.

Irritation

low

Source

synthetic

beautyskincareanti-aging
Read ingredient review

Anti-aging agent

Rainbow Trout Oligopeptide Complex

SR-RAINBOW TROUT OLIGOPEPTIDE-1 SH-OLIGOPEPTIDE-2

3.5

A novel peptide complex from fish sources that may support skin firmness and repair, but human research is very limited.

Irritation

low

Source

natural

beautyskincareanti-aging
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Skin-conditioning agent

Recombinant Polypeptide-47

TRANSGENIC NEMATODE RH-POLYPEPTIDE-47

3.5

A biotech-derived peptide that may help support skin firmness, but human research is still limited.

Irritation

low

Source

biotech

beautyskincareanti-aging
Read ingredient review

Cell-communicating ingredient

Retinal

Retinal

4.5

Retinal is a highly effective retinoid that works faster than retinol but may cause more irritation, making it best for experienced users seeking visible anti-aging results.

Irritation

moderate

Source

semi-synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Retinoxytrimethylsilane

Retinoxytrimethylsilane

4.0

A gentler, more stable version of retinol that can help smooth fine lines and improve skin texture with less irritation.

Irritation

low

Source

semi-synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Retinoyl Oligopeptide-112

Retinoyl Oligopeptide-112

4.0

A gentle peptide-retinoid hybrid that aims to support smoother, firmer skin without the typical irritation of pure retinol.

Irritation

low

Source

semi-synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Retinoyl Oligopeptide-86

Retinoyl Oligopeptide-86

4.0

A gentler peptide-retinoid hybrid that aims to smooth fine lines and improve skin texture with less irritation than traditional retinol.

Irritation

low

Source

semi-synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Retinoyl Pentapeptide-4

Retinoyl Pentapeptide-4

4.0

A gentler alternative to retinol that pairs retinoic acid with a peptide to support collagen and smooth fine lines with less irritation.

Irritation

low

Source

semi-synthetic

beautyskincareanti-aging
Read ingredient review

Anti-Aging Agent

Retinoyl Pullulan

RETINOYL PULLULAN

4.0

A gentle, water-soluble retinoid alternative that aims to smooth fine lines and improve skin texture with less irritation than traditional retinol.

Irritation

low

Source

semi-synthetic

beautyskincareanti-aging
Read ingredient review