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 265
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

Soothing Agent

Mimosa Pudica Flower Water

MIMOSA PUDICA FLOWER WATER

3.8

Mimosa Pudica Flower Water is a mild, soothing hydrosol with antioxidant potential, but research on its cosmetic benefits is still limited.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Mugwort Ferment Filtrate

Saccharomyces/Artemisia Princeps Leaf Ferment Filtrate

4.0

A fermented mugwort ingredient that may calm irritation and support a healthy skin barrier, though more human studies are needed.

Irritation

low

Source

biotech

beautyskincaresoothing
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Soothing Agent

Mugwort Leaf Water

Artemisia Princeps Leaf Water

4.2

A gentle, antioxidant-rich botanical water that helps calm irritation and supports a balanced skin barrier.

Irritation

low

Source

natural

beautyskincaresoothing
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Humectant

Multi-Ferment Rice Protein Complex

KLUYVEROMYCES/LACTOBACILLUS/LACTOCOCCUS/LEUCONOSTOC/SACCHAROMYCES/HYDROLYZED RICE PROTEIN FERMENT FILTRATE

4.0

A gentle, fermented multi-strain ingredient that hydrates and supports the skin barrier without irritation.

Irritation

low

Source

biotech

beautyskincarehumectantsoothing
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Humectant

Multi-Ferment Wheat Protein Complex

KLUYVEROMYCES/LACTOBACILLUS/LACTOCOCCUS/LEUCONOSTOC/SACCHAROMYCES/HYDROLYZED WHEAT GLUTEN FERMENT FILTRATE

4.0

A fermented probiotic-wheat complex that helps hydrate and calm the skin, but those with gluten sensitivity should be cautious.

Irritation

low

Source

biotech

beautyskincarehumectantsoothing
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Soothing Agent

Multi-Flower Hydrosol Blend

BORAGO OFFICINALIS/LAVANDULA ANGUSTIFOLIA/HYACINTHUS ORIENTALIS/SALVIA SCLAREA/(CENTAUREA CYANUS/CHAMOMILLA RECUTITA) FLOWER/CHAMOMILLA RECUTITA LEAF WATER

3.8

A gentle floral water blend that soothes and refreshes skin with a light natural scent, but benefits are mild and vary by flower.

Irritation

low

Source

natural

beautyskincaresoothing
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Antioxidant

Multi-Herb Botanical Blend

CENTELLA ASIATICA/CHAMOMILLA RECUTITA (MATRICARIA) FLOWER/(CAMELLIA SINENSIS/ROSMARINUS OFFICINALIS /ZEA MAYS LEAF)/(GLYCYRRHIZA GLABRA/POLYGONUM CUSPIDATUM/SCUTELLARIA BAICALENSIS ROOT) EXTRACT

4.0

A soothing, antioxidant-rich botanical blend that may help calm skin and fight free radicals, but individual extract concentrations are unknown.

Irritation

low

Source

natural

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Soothing Agent

Multi-Herb Botanical Extract

Althaea Officinalis Root/Anthemis Nobilis Flower/Foeniculum Vulgare Fruit/Houttuynia Cordata/Lavandula Angustifolia Flower/Ocimum Basilicum Flower/Rosmarinus Officinalis Leaf Extract

4.0

A gentle, multi-herb blend that may help calm skin and provide antioxidant protection, but individual herb concentrations are unknown.

Irritation

low

Source

natural

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Skin Conditioning

Multi-Herb Ferment Filtrate

LACTOBACILLUS/RHODOPSEUDOMONAS/SACCHAROMYCES/MOLASSES/LAVENDER/THYMUS SERPYLLUM/CYMBOPOGON CITRATUS/PEPPERMINT/MELISSA OFFICINALIS/CHAMOMILLA RECUTITA FLOWER/BERGAMOT LEAF/SPEARMINT/ROSEMARY FERMENT FILTRATE

4.0

A gentle, fermented botanical blend that may help soothe and condition the skin, though individual herb effects vary and research is still emerging.

Irritation

low

Source

biotech

beautyskincaresoothing
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Antioxidant

Multi-Herb Leaf & Stem Extract

Urtica Dioica Leaf/Tussilago Farfara Leaf/Equisetum Arvense Stem/Rosmarinus Officinalis Leaf/Salvia Officinalis Leaf/Achillea Millefolium Flower/Menyanthes Trifoliata Leaf/Betula Alba Leaf Extract

3.8

A multi-herb blend that offers antioxidant and soothing benefits, but individual herb concentrations are unknown and research is mostly on single extracts.

Irritation

low

Source

natural

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Soothing Agent

Multi-Herb Soothing Extract

CHAMOMILLA RECUTITA FLOWER/LAVANDULA ANGUSTIFOLIA FLOWER/MELISSA OFFICINALIS LEAF/ROSMARINUS OFFICINALIS LEAF/SALVIA OFFICINALIS LEAF EXTRACT

4.0

A gentle herbal blend that may help calm irritated skin and provide antioxidant protection, but individual plant sensitivities are possible.

Irritation

low

Source

natural

beautyskincaresoothing
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Skin conditioning

Multi-Strain Milk Ferment Extract

BIFIDA/ENTEROCOCCUS FAECIUM/LACTOBACILLUS/STREPTOCOCCUS THERMOPHILUS/SOYMILK/NONFAT MILK FERMENT EXTRACT

4.0

A gentle, fermented probiotic complex that may help soothe and strengthen the skin barrier, though more human studies are needed.

Irritation

low

Source

biotech

beautyskincaresoothing
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Antioxidant

Mushroom Ferment Complex

(GRIFOLA FRONDOSA/ INONOTUS OBLIQUUS / SCHIZOPHYLLUM COMMUNE/ TRICHOLOMA MATSUTAKE) MYCELIUM /LETHARIELLA CLADONIOIDES FERMENT EXTRACT FILTRATE

4.0

A fermented mushroom and lichen complex that may help calm and protect skin, though human studies are limited.

Irritation

low

Source

biotech

beautyskincareantioxidantsoothing
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Soothing Agent

Myrica Gale Leaf Water

MYRICA GALE LEAF WATER

3.8

A gentle, naturally derived leaf water that may help calm skin and provide antioxidant protection, but research is limited.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing agent

Myrtle Leaf Water

MYRTUS COMMUNIS LEAF WATER

3.8

Myrtle leaf water is a mild, aromatic botanical water that can help soothe and refresh the skin, but its benefits are not strongly backed by independent research.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing agent

Nostoc Endophytum Ferment

NOSTOC ENDOPHYTUM FERMENT FILTRATE

3.8

A gentle, biotech-derived cyanobacterium extract that may help calm skin and fight oxidative stress, though research is still early.

Irritation

low

Source

biotech

beautyskincaresoothing
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Soothing agent

Oak Wood Vinegar

Quercus Glauca Wood Vinegar

3.8

A gentle, natural wood distillate that may help calm and clarify skin, but research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothingpurifying
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Soothing agent

Oat Kernel Extract

Avena Sativa (Oat) Kernel Extract

4.5

Oat kernel extract is a gentle, antioxidant-rich ingredient that soothes and hydrates sensitive or irritated skin without clogging pores.

Irritation

low

Source

natural

beautyskincaresoothing
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Absorbent

Oat Kernel Meal

Avena Sativa (Oat) Kernel Meal

4.5

A gentle, natural exfoliant and skin soother that's especially kind to sensitive and dry skin types.

Irritation

low

Source

natural

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Soothing Agent

Oat Leaf Extract

Avena Sativa Leaf Extract

4.0

A gentle, antioxidant-rich extract that helps calm irritated skin and supports the skin barrier.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing agent

Oat Seed Water

Avena Sativa (Oat) Seed Water

4.0

Oat seed water is a gentle, hydrating ingredient that helps calm sensitive or irritated skin without clogging pores.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing agent

Olive Flower Water

Olea Europaea Flower Water

3.8

A mild, aromatic floral water that offers light hydration and a soothing feel, but lacks strong clinical evidence for specific skin benefits.

Irritation

low

Source

natural

beautyskincaresoothing
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Humectant

Onsen-Sui

Water, Butylene Glycol, Glycerin, Dipropylene Glycol, PEG-60 Hydrogenated Castor Oil, Phenoxyethanol, Chlorphenesin, Sodium Hyaluronate, Hydrolyzed Collagen, Aloe Barbadensis Leaf Extract, Camellia Sinensis Leaf Extract, Chamomilla Recutita (Matricaria) Flower Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Thymus Vulgaris (Thyme) Extract, Salvia Officinalis (Sage) Leaf Extract, Lavandula Angustifolia (Lavender) Flower Extract, Citrus Limon (Lemon) Fruit Extract, Citrus Aurantium Dulcis (Orange) Fruit Extract, Citrus Paradisi (Grapefruit) Fruit Extract, Vitis Vinifera (Grape) Seed Extract, Tocopherol, Ascorbic Acid, Retinyl Palmitate, Biotin, Folic Acid, Niacinamide, Panthenol, Pyridoxine HCl, Riboflavin, Thiamine HCl, Cyanocobalamin, Zinc PCA, Copper PCA, Magnesium PCA, Manganese PCA, Potassium PCA, Silica, Sodium PCA, Hydrolyzed Elastin, Hydrolyzed Keratin, Hydrolyzed Silk, Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein, Hydrolyzed Rice Protein, Hydrolyzed Oat Protein, Hydrolyzed Corn Protein, Hydrolyzed Potato Protein, Hydrolyzed Yeast Protein, Hydrolyzed Milk Protein, Hydrolyzed Egg Protein, Hydrolyzed Fish Collagen, Hydrolyzed Shark Cartilage, Hydrolyzed Chondroitin Sulfate, Hydrolyzed Glycosaminoglycans, Hydrolyzed Hyaluronic Acid, Hydrolyzed Keratin, Hydrolyzed Silk, Hydrolyzed Wheat Protein, Hydrolyzed Soy Protein, Hydrolyzed Rice Protein, Hydrolyzed Oat Protein, Hydrolyzed Corn Protein, Hydrolyzed Potato Protein, Hydrolyzed Yeast Protein, Hydrolyzed Milk Protein, Hydrolyzed Egg Protein, Hydrolyzed Fish Collagen, Hydrolyzed Shark Cartilage, Hydrolyzed Chondroitin Sulfate, Hydrolyzed Glycosaminoglycans, Hydrolyzed Hyaluronic Acid

3.8

Onsen-Sui is a multi-ingredient blend that mimics the benefits of hot spring water, offering hydration, soothing effects, and a cocktail of antioxidants and nutrients for the skin.

Irritation

low

Source

mixed

beautyskincarehumectantantioxidant
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Soothing Agent

Ormenis Flower Water

Ormenis Mixta Flower Water

3.8

A gentle, aromatic floral water that offers mild soothing and refreshing benefits, but its effectiveness is not as well-studied as more common floral waters like rose or chamomile.

Irritation

low

Source

natural

beautyskincaresoothing
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Humectant

Ozonized Glycerin

OZONIZED GLYCERIN

4.0

Ozonized glycerin is a gentle, multi-tasking ingredient that hydrates while offering soothing and antimicrobial benefits, making it a promising option for acne-prone or sensitive skin.

Irritation

low

Source

semi-synthetic

beautyskincarehumectantsoothing
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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

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Soothing Agent

Parrot's Feather Extract

Myriophyllum Verticillatum Extract

3.8

A gentle, plant-derived extract that may help calm irritated skin and provide antioxidant protection, though research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Pear Flower Water

Pyrus Communis Flower Water

3.5

Pear flower water is a gentle, lightly fragrant hydrosol that can refresh and soothe skin, but it lacks strong clinical evidence for specific benefits.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Pelargonium Flower Water

PELARGONIUM GRAVEOLENS FLOWER/LEAF/STEM WATER

4.0

A gentle, aromatic hydrosol that can help soothe and lightly tone the skin without harshness.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Peony Flower Water

PAEONIA SUFFRUTICOSA FLOWER WATER

4.0

Peony flower water is a gentle, antioxidant-rich floral water that can help soothe and brighten skin without irritation.

Irritation

low

Source

natural

beautyskincareantioxidantsoothing
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Skin conditioning

Peppermint Ferment Filtrate

Saccharomyces/Peppermint Leaf Ferment Filtrate

3.8

A gentle fermented ingredient that may help soothe and condition skin, though research is still emerging.

Irritation

low

Source

biotech

beautyskincaresoothing
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Soothing Agent

Peppermint Leaf Juice

Mentha Piperita Leaf Juice

3.8

Peppermint Leaf Juice offers a refreshing, cooling sensation and mild astringent benefits, but its high menthol content can irritate sensitive or broken skin.

Irritation

moderate

Source

natural

beautyskincaresoothing
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Soothing Agent

Pine Tar Oil

Pinus Palustris Tar Oil

3.8

Pine tar oil is a traditional ingredient known for soothing irritated skin and scalp, but its strong odor and potential for irritation mean it's best used in targeted, low-concentration formulas.

Irritation

moderate

Source

natural

beautyskincaresoothing
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Soothing agent

Pine Wood Tar

Pinus Palustris Wood Tar

3.8

A traditional natural ingredient with soothing and cleansing properties, but its strong scent and potential for irritation mean it's best for occasional use in rinse-off products.

Irritation

moderate

Source

natural

beautyskincaresoothing
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Soothing Agent

Pineapple Leaf Juice

ANANAS ERECTIFOLIUS LEAF JUICE

3.8

Pineapple Leaf Juice is a gentle, antioxidant-rich ingredient that may help soothe and protect the skin, but research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Pinellia Root Extract

PINELLIA TERNATA ROOT EXTRACT

3.8

A gentle herbal extract with traditional use for calming skin, but modern research is still limited.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Poppy Flower Water

PAPAVER RHOEAS FLOWER WATER

3.8

A gentle floral water that may help calm sensitive skin, but its benefits are largely anecdotal and not backed by strong clinical research.

Irritation

low

Source

natural

beautyskincaresoothing
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Brightening agent

Potassium Azeloyl Diglycinate

POTASSIUM AZELOYL DIGLYCINATE

4.3

A well-tolerated alternative to azelaic acid that helps fade dark spots, calm redness, and refine pores without irritation.

Irritation

low

Source

semi-synthetic

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Soothing Agent

Prunus Mume Flower Water

Prunus Mume Flower Water

3.8

A gentle floral water that may offer soothing and antioxidant benefits, but research is limited compared to more established ingredients.

Irritation

low

Source

natural

beautyskincaresoothing
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Humectant

Pullulan Ferment Filtrate

AUREOBASIDIUM PULLULANS/OLIVE OIL FERMENT FILTRATE

4.0

A gentle, fermented ingredient that helps hydrate and soothe the skin while supporting a healthy moisture barrier.

Irritation

low

Source

biotech

beautyskincarehumectantsoothing
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Soothing Agent

Purslane Extract

Portulaca Oleracea Flower/Leaf/Stem Extract

4.3

A gentle, antioxidant-rich plant extract that helps calm irritation and protect skin from environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidantsoothing
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Humectant

Quince Fruit Water

Cydonia Oblonga Fruit Water

4.0

Quince fruit water is a mild, hydrating botanical water that can soothe and lightly moisturize skin, but it lacks strong clinical evidence for dramatic effects.

Irritation

low

Source

natural

beautyskincarehumectantsoothing
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Soothing Agent

Red Sandalwood Extract

PTEROCARPUS SANTALINUS STEM EXTRACT

4.0

A gentle botanical extract that may help calm redness and provide antioxidant protection, though human studies are limited.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Reindeer Moss Extract

CLADONIA RANGIFERINA EXTRACT

3.8

A gentle, natural extract that may help calm skin and fight environmental stress, but research is still early.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Rhubarb Stalk Juice

Rheum Rhabarbarum Stalk Juice

3.8

Rhubarb Stalk Juice is a gentle, plant-based ingredient that may help calm skin and provide antioxidant protection, but research is still emerging.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing agent

Roman Chamomile Flower Oil

Anthemis Nobilis Flower Oil

4.0

Roman chamomile flower oil is a gentle, fragrant oil that helps calm irritated skin and reduce redness, but it should be used in low concentrations and avoided by those with ragweed allergies.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Rose Flower Water

ROSA HYBRID FLOWER WATER

4.0

A mild, aromatic hydrator that can soothe skin and add a pleasant scent, but its benefits are largely from water and trace rose compounds.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Rosemary Water

ROSMARINUS OFFICINALIS FLOWER/LEAF/STEM WATER

4.0

Rosemary water is a mild, aromatic hydrosol that can offer gentle antioxidant and soothing benefits, but its effects are subtle and best suited for those who enjoy botanical skincare.

Irritation

low

Source

natural

beautyskincaresoothing
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Skin conditioning

Rye Ferment Filtrate

LACTOBACILLUS/RYE FLOUR FERMENT FILTRATE

4.0

A gentle, fermented ingredient that may help strengthen the skin barrier and support a balanced microbiome.

Irritation

low

Source

biotech

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Antioxidant

Sacred Lotus Flower Extract

Nelumbium Speciosum Flower Extract

4.0

A gentle, antioxidant-rich botanical extract that helps soothe and protect the skin from environmental stress.

Irritation

low

Source

natural

beautyskincareantioxidantsoothing
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Soothing agent

Safflower Flower Juice

CARTHAMUS TINCTORIUS FLOWER JUICE

3.8

A gentle, antioxidant-rich flower water that can help calm skin, but it's not a powerhouse ingredient on its own.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Safflower Flower Water

Carthamus Tinctorius Flower Water

3.8

A mild, floral water that can add light hydration and a soothing touch to skincare, but its benefits are subtle and not as well-researched as other ingredients.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Sage Flower/Leaf/Stem Water

Salvia Officinalis Flower/Leaf/Stem Water

3.8

A mild, aromatic water that can soothe skin and provide antioxidant benefits, but is not a powerhouse active ingredient.

Irritation

low

Source

natural

beautyskincaresoothing
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Soothing Agent

Sakhalin Fir Branch/Leaf Water

ABIES SACHALINENSIS BRANCH/LEAF WATER

3.8

A gentle, aromatic plant water that may offer mild soothing and antioxidant benefits, but research is limited.

Irritation

low

Source

natural

beautyskincaresoothing
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Antioxidant

Salacia Reticulata Wood Extract

Salacia Reticulata Wood Extract

3.8

A gentle, antioxidant-rich wood extract that may help calm skin and protect against environmental stress, though human studies are limited.

Irritation

low

Source

natural

beautyskincareantioxidantsoothing
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Humectant

Samphire Callus Extract

SALICORNIA HERBACEA CALLUS CULTURE EXTRACT

4.0

A gentle, biotech-grown extract from a salt-marsh plant that helps hydrate and calm the skin, with early research suggesting antioxidant benefits.

Irritation

low

Source

biotech

beautyskincarehumectantsoothing
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Soothing Agent

Sandalwood Wood Extract

SANTALUM ALBUM WOOD EXTRACT

4.0

A gentle, aromatic wood extract that helps calm irritation and fight environmental stress, but its benefits are mostly supported by traditional use and limited modern studies.

Irritation

low

Source

natural

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