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 539
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 Hexapeptide-15

Palmitoyl Hexapeptide-15

4.2

A lab-made peptide that signals skin to appear firmer and smoother, with low irritation potential.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Palmitoyl Hexapeptide-52

Palmitoyl Hexapeptide-52

4.0

A synthetic peptide that may help support collagen and improve skin firmness with low irritation risk.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Palmitoyl Hexapeptide-56

Palmitoyl Hexapeptide-56

4.0

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

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Soothing agent

Palmitoyl Methoxytryptamine

Palmitoyl Methoxytryptamine

3.8

A gentle, melatonin-inspired ingredient that may help calm skin and support overnight repair, but research is still early.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Palmitoyl Nonapeptide-6

Palmitoyl Nonapeptide-6

4.0

A synthetic peptide that mimics natural signals to encourage firmer, smoother-looking skin over time.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Palmitoyl Pentapeptide-5

Palmitoyl Pentapeptide-5

4.2

A well-studied peptide that may help reduce fine lines and support firmer-looking skin with consistent use.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

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
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 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
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
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
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

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-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

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

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
Read ingredient review

Skin conditioning agent

Pectobacterium Polypeptide-1

SR-PECTOBACTERIUM POLYPEPTIDE-1

3.8

A novel biotech peptide that may help strengthen the skin barrier and reduce fine lines, but research is still early.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Skin-conditioning agent

PEG-100 Melittin Amide

METHOXY PEG-100 PROPYL MELITTIN AMIDE

3.5

A lab-made peptide inspired by bee venom that aims to smooth and firm skin, but human research is very limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Pentapeptide-29 Cysteinamide

Pentapeptide-29 Cysteinamide

4.2

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

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Pentapeptide-44

Pentapeptide-44

4.0

A synthetic peptide that may help firm skin and soften fine lines, but human data is still limited compared to well-studied peptides.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Pentapeptide-47

Pentapeptide-47

4.0

A lab-made peptide that may help firm skin and soften expression lines, but results are subtle and require consistent use.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging

Pentapeptide-51

Pentapeptide-51

4.0

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

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Pentapeptide-61

Pentapeptide-61

4.0

Pentapeptide-61 is a lab-made peptide that may help reduce fine lines and improve skin firmness by signaling collagen production, but human studies are limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Skin conditioning agent

Peptide Complex Blend

Escherichia Coli Thioredoxin-1, Heptapeptide-20, Hexapeptide-40, Oligopeptide-113, Sh-Polypeptide-70

3.5

A cutting-edge peptide blend that may support skin firmness, but research is still emerging and the complex formulation makes it hard to evaluate.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Skin conditioning agent

Peptide Complex with Defensin-Like Protein

R-(SH-POLYPEPTIDE-102 METHIONYL S-PENTADIPLANDRA BRAZZEANA DEFENSIN-LIKE PROTEIN)

3.5

A novel peptide-protein hybrid with promising but limited research; may help support skin resilience.

Irritation

low

Source

semi-synthetic

beautyskincarepeptide
Read ingredient review

Skin conditioning agent

Phenylalanine Peptide Complex

TRIS(PEG-2 PHENYLALANYLCARBOXAMIDO) CYCLOHEXANE

4.0

A synthetic peptide that may help improve skin firmness and reduce fine lines, with a good safety profile for most skin types.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-Aging Agent

Porcine Polypeptide-1

PORCINE POLYPEPTIDE-1

3.5

A peptide from porcine sources that may help support skin firmness, but research is limited and ethical concerns exist.

Irritation

low

Source

natural

beautyskincarepeptide
Read ingredient review

Skin-conditioning agent

Potato SH-Oligopeptide-1

Potato SH-Oligopeptide-1

4.0

A gentle, plant-derived peptide that may help support skin firmness and a more youthful look, though research is still emerging.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Skin conditioning agent

Potato SH-Oligopeptide-2

Potato SH-Oligopeptide-2

3.8

A gentle, plant-derived peptide that may help improve skin hydration and firmness, but research is still limited.

Irritation

low

Source

natural

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Potato SH-Polypeptide-1

Potato SH-Polypeptide-1

3.8

A gentle, plant-based peptide that may help improve skin firmness, but research is still limited.

Irritation

low

Source

natural

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Potato SH-Polypeptide-9

Potato SH-Polypeptide-9

4.0

A gentle, plant-derived peptide that may help support skin firmness and reduce fine lines, though research is still emerging.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Prolyl Histamine HCl

PROLYL HISTAMINE HCL

3.5

A synthetic peptide that may help reduce signs of aging and calm skin, but research is still emerging.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Quinoyl Tripeptide-1

Quinoyl Tripeptide-1

4.0

A synthetic peptide that may help support skin firmness and reduce fine lines, but more human studies are needed to confirm its effects.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Quinoyl Tripeptide-35

Quinoyl Tripeptide-35

3.8

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

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

R-Bovine Octapeptide-1

R-Bovine Octapeptide-1

3.5

A synthetic peptide that may help reduce the look of fine lines, but research is limited and mostly based on similar peptides.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Skin conditioning agent

R-Bovine Oligopeptide-1

R-Bovine Oligopeptide-1

4.0

A lab-made peptide that may help firm and repair skin, but human studies are limited and it's not a medical treatment.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Skin conditioning agent

R-Leucosporidium Polypeptide-1

R-Leucosporidium Polypeptide-1

3.8

A novel yeast-derived peptide that may help improve skin firmness, but research is still early and benefits are not yet proven in large human studies.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Anti-Aging Agent

Rainbow Trout Oligopeptide-1

SR-RAINBOW TROUT OLIGOPEPTIDE-1 SH-POLYPEPTIDE-9

3.5

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

Irritation

low

Source

natural

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Retinoyl Tetrapeptide-43 Amide

Retinoyl Tetrapeptide-43 Amide

4.0

A gentle peptide-retinoid hybrid that aims to support smoother, firmer-looking skin without the harsh side effects of traditional retinoids.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging

Retinoyl Tripeptide-1

Retinoyl Tripeptide-1

4.3

A gentle peptide-retinoid hybrid that supports collagen without the harsh side effects of pure retinol.

Irritation

low

Source

semi-synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging agent

RH-Polypeptide-104

RH-Polypeptide-104

3.8

RH-Polypeptide-104 is a lab-made peptide that may help support collagen and improve skin firmness, but research is still early.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-Aging Agent

RH-Polypeptide-111

RH-Polypeptide-111

4.0

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

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Skin-conditioning agent

RH-Polypeptide-20

RH-Polypeptide-20

4.0

A lab-made peptide that may help firm skin and reduce fine lines, with low irritation risk.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Anti-aging agent

RH-Polypeptide-47

RH-Polypeptide-47

3.8

A promising synthetic peptide that may help firm skin and reduce fine lines, but human research is still limited.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Anti-aging agent

RH-Polypeptide-59

RH-Polypeptide-59

4.0

A lab-made peptide that may help firm skin and soften wrinkles, but human studies are still limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-Aging Agent

RH-Polypeptide-68

RH-Polypeptide-68

3.8

A lab-made peptide that may help reduce fine lines and improve skin firmness, but human research is still limited.

Irritation

low

Source

synthetic

beautyskincarepeptide
Read ingredient review

Anti-aging

RH-Polypeptide-94

RH-Polypeptide-94

3.8

RH-Polypeptide-94 is a synthetic peptide that may help firm skin and soften fine lines, but research is still early.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Anti-Aging Agent

RH-Polypeptide-95

RH-Polypeptide-95

3.8

A promising synthetic peptide that may help firm and smooth skin, but research is still early and benefits vary by formulation.

Irritation

low

Source

semi-synthetic

beautyskincarepeptide
Read ingredient review

Anti-Aging Agent

Rice SH-Oligopeptide-1

Rice SH-Oligopeptide-1

4.0

A gentle, rice-derived peptide that may help improve skin firmness and reduce fine lines with regular use.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Rice SH-Oligopeptide-2

Rice SH-Oligopeptide-2

3.8

A gentle, bioengineered peptide that may help support skin firmness, but research is still emerging.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review

Anti-aging agent

Rice SH-Polypeptide-1

Rice SH-Polypeptide-1

4.0

A gentle rice-derived peptide that may help improve skin firmness and reduce fine lines, though human studies are still limited.

Irritation

low

Source

biotech

beautyskincarepeptide
Read ingredient review