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Ingredients Starting With I

111 skincare ingredients in the glossary begin with I. Learn what each one does, how it works, and which products contain it.

All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

I

Ibuprofen

IBUPROFEN

A topical soothing with established use for localised pain and inflammation relief

Ichthammol

ICHTHAMMOL

A century-old purifying derived from shale oil, used to calm inflammatory skin conditions

Idebenone

hydroxydecyl ubiquinone

Idebenone is a synthetic antioxidant similar to coenzyme Q10.

Ilex Aquifolium Flower Extract

ILEX AQUIFOLIUM FLOWER EXTRACT

A botanical extract with skin-conditioning properties derived from holly flower

Ilex Aquifolium Leaf Extract

ILEX AQUIFOLIUM LEAF EXTRACT

A plant extract with antioxidant properties traditionally used to support skin conditioning

Ilex Aquifolium Leaf Powder

ILEX AQUIFOLIUM LEAF POWDER

A plant-derived powder that conditions and softens the skin

Ilex Crenata Extract

ILEX CRENATA EXTRACT

A plant extract with skin conditioning properties

Ilex Guayusa Leaf Extract

ILEX GUAYUSA LEAF EXTRACT

A plant extract with antioxidant properties sourced from the Amazonian guayusa plant

Ilex Paraguariensis Leaf Extract

ILEX PARAGUARIENSIS LEAF EXTRACT

A polyphenol-rich plant extract with antioxidant and skin-conditioning properties

Ilex Paraguariensis Leaf Oil

ILEX PARAGUARIENSIS LEAF OIL

A fragrant botanical oil derived from South American holly leaves

Ilex Rotunda Extract

ILEX ROTUNDA EXTRACT

Plant extract with potential to support skin resilience and calm inflammatory responses

Ilex Rotunda Leaf Extract

ILEX ROTUNDA LEAF EXTRACT

A plant extract with antioxidant properties to help protect skin from environmental stressors

Illicium Verum Anise Fruit Extract

Plant-derived cosmetic ingredient

Illicium Verum Fruit Extract

ILLICIUM VERUM FRUIT EXTRACT

A traditional botanical extract with emerging evidence for soothing skin support

Illite

French green clay

Mineral-sourced natural thickener

Imidazolidinyl Urea

IMIDAZOLIDINYL UREA

A synthetic preservative that prevents microbial growth in skincare formulations

Imperata Cylindrica Root Extract

Desert grass for powerful hydration retention

Inactive Ingredient

Provides support for active ingredients in a skin care formula

Inca Inchi Oil

Plukenetia Volubilis Seed Oil

Omega-rich Amazonian oil for intense skin nourishment

Indigofera Tinctoria Extract

INDIGOFERA TINCTORIA EXTRACT

A plant-derived colourant and skin conditioning agent from indigo leaves

Indigofera Tinctoria Leaf

INDIGOFERA TINCTORIA LEAF

A natural plant extract traditionally used for colour and skin conditioning

Indigofera Tinctoria Leaf Extract

INDIGOFERA TINCTORIA LEAF EXTRACT

A natural plant extract traditionally used in cosmetic colouring with skin-conditioning properties

Indigofera Tinctoria Leaf Powder

INDIGOFERA TINCTORIA LEAF POWDER

A plant-derived powder traditionally used to condition and support skin appearance

Indirubin

INDIRUBIN

A phytochemical compound that may support skin barrier function and inflammatory response

Indol Acetyl Phenylalanine

INDOL ACETYL PHENYLALANINE

A skin-conditioning amino acid derivative with potential applications in itch and irritation management

Indole Acetic Acid

INDOLE ACETIC ACID

A plant-derived photosensitiser studied for acne and precancerous skin lesions

Inonotus Obliquus Extract

INONOTUS OBLIQUUS EXTRACT

A fungal extract with antioxidant properties traditionally used in skincare formulations

Inositol

myo-inositol

Major component of fatty acid lecithin Also known as myo-inositol and d-chiro inositol

Inula Helenium Extract

INULA HELENIUM EXTRACT

A plant extract traditionally used to support skin soothing and reduce inflammatory responses

Inulin

Polysaccharide

A prebiotic, plant-derived polysaccharide fibre Helps support a healthy skin microbiome

Inulin Lauryl Carbamate

INULIN LAURYL CARBAMATE

A plant-derived emulsion stabiliser that helps formulations stay uniform and smooth

Iodized Garlic Extract

IODIZED GARLIC EXTRACT

A plant-derived conditioning agent that supports skin's natural moisture balance

Iodopropynyl Butylcarbamate

Iodopropynyl butylcarbamate is a synthetic preservative

Ipomoea Batatas Root Extract

From the sweet potato plant Rich in antioxidant polyphenols

Iris Florentina Root

IRIS FLORENTINA ROOT

A botanical extract with dual effects on skin pigmentation and potential soothing benefits

Iris Florentina Root Extract

IRIS FLORENTINA ROOT EXTRACT

A botanical extract with dual effects on skin pigmentation and texture

Iris Pallida Leaf Cell Extract

IRIS PALLIDA LEAF CELL EXTRACT

A plant-derived antioxidant extract that helps protect skin from environmental stressors

Iris Setosa Callus Culture Extract

IRIS SETOSA CALLUS CULTURE EXTRACT

Plant cell culture extract with antioxidant and conditioning properties

Iris Versicolor Extract

IRIS VERSICOLOR EXTRACT

A botanical extract traditionally used to soothe and condition the skin

Irish Moss Extract

Algae

Is a type of seaweed that's also known as red algae Contains skin-beneficial compounds like beta-carotene and potent antioxidants

Iritone

IRITONE

A fragrance component used to add scent to skincare formulations

Iron Hydroxide

IRON HYDROXIDE

A stabilising mineral used primarily in colour cosmetics and formulation support

Iron Oxides

CI 77491

Cosmetic pigments that originate from natural minerals Used to tint sunscreens and makeup

Iron Picolinate

IRON PICOLINATE

An iron-binding compound with potential antioxidant properties for photoprotection

Iron Powder

IRON POWDER

A mineral powder used primarily for opacity and light-diffusing properties in cosmetic formulations

Irvingia Gabonensis Kernel Butter

IRVINGIA GABONENSIS KERNEL BUTTER

A plant-derived butter that conditions and softens the skin barrier

Isoamyl Laurate

Skin-softening emollient that imparts a lightweight, velvety feel | Enhances the spreadability of a formula

Isoamyl P-Methoxycinnamate

ISOAMYL P-METHOXYCINNAMATE

A chemical UV filter that absorbs UVB radiation to help protect skin from sun damage

Isobutane

ISOBUTANE

A lightweight propellant gas used to dispense aerosol skincare products

Isobutyl Benzoate

ISOBUTYL BENZOATE

A multi-purpose solvent and fragrance ingredient used in skincare formulations

Isobutyl Butyrate

ISOBUTYL BUTYRATE

A volatile ester used primarily to deliver fragrance in skincare formulations

Isobutylamido Thiazolyl Resorcinol

ISOBUTYLAMIDO THIAZOLYL RESORCINOL

A tyrosinase inhibitor designed to address hyperpigmentation at the source

Isobutylparaben

A controversial preservative | Part of the paraben group

4-Isobutylresorcinol

4-ISOBUTYLRESORCINOL

A synthetic antioxidant that helps protect skin from oxidative stress and environmental damage

Isobutyroyl C10-40 Hydroxyacid C10-40 Isoalkyl Esters

ISOBUTYROYL C10-40 HYDROXYACID C10-40 ISOALKYL ESTERS

A conditioning ester that helps smooth and soften the skin's surface

Isoceteth-20

Mild surfactant, noted for its ability to gently cleanse with minimal disruption to skin’s barrier

Isocetyl Alcohol

ISOCETYL ALCOHOL

A lightweight conditioning agent that softens skin and adjusts product texture

Isocetyl Stearoyl Stearate

ISOCETYL STEAROYL STEARATE

A synthetic emollient that conditions skin and regulates product texture

Isochrysis Galbana Extract

ISOCHRYSIS GALBANA EXTRACT

A marine extract that conditions and supports skin's natural moisture balance

Isochrysis Galbana/Phaeodactylum Tricornutum Extract

ISOCHRYSIS GALBANA/PHAEODACTYLUM TRICORNUTUM EXTRACT

A marine extract that conditions and supports skin's natural moisture balance

Isodecyl Neopentanoate

Synthetic emollient that also helps product flow | Delivers silicone-like esthetics with a light, dry finish

Isodecyl Salicylate

Ester of decyl alcohol + salicylic acid | Skin conditioning ingredient

Isododecane

Synthetic hydrocarbon ingredient used as a solvent

Isodon Trichocarpus Extract

ISODON TRICHOCARPUS EXTRACT

A plant extract that conditions skin and helps mask minor imperfections

Isodonis Japonicus Leaf/Stalk Extract

ISODONIS JAPONICUS LEAF/STALK EXTRACT

A plant-derived conditioning agent that softens and protects the skin barrier

Isoeugenol

ISOEUGENOL

A fragrant phenolic compound with antioxidant properties, but notable sensitisation potential

Isoflavone

Equol

Potent antioxidant Plant-derived ingredient

Isohexadecane

Versatile ingredient used as a cleansing agent, solvent, texture enhancer, and skin-conditioning agent | Imparts a non-greasy, lightweight, silky feel

Isoleucine

An essential amino acid that provides hydrating benefits | Plays a role in maintaining collagen and elastin (when consumed)

Isomalt

Polysaccharide that works as a humectant

Isomerized Jojoba Oil

ISOMERIZED JOJOBA OIL

A lightweight oil derived from jojoba that conditions and softens the skin

Isomerized Linoleic Acid

ISOMERIZED LINOLEIC ACID

A fatty acid derivative that supports skin barrier function and conditioning

Isoniacinamide

ISONIACINAMIDE

A niacinamide analogue that conditions and supports skin barrier function

Isononyl Isononanoate

Synthetic ester that functions as an emollient skin-softening agent

Isooctanoyl Tetrapeptide-25

ISOOCTANOYL TETRAPEPTIDE-25

A peptide fragment designed to support skin conditioning and firmness

Isoparaffin

Saturated white wax derived from petroleum | Highly purified for use in cosmetics

Isopentyldiol

Synthetic ingredient that is used as solvent to form cosmetic solutions

Isophorone Diamine …

ISOPHORONE DIAMINE/CYCLOHEXYLAMINE/ISOPHTHALIC ACID/AZELAIC ACID COPOLYMER

A film-forming polymer that helps create a smooth, even base layer on skin

Isopropyl Alcohol

ISOPROPYL ALCOHOL

A volatile solvent commonly used in formulations to dissolve other ingredients and control texture

Isopropyl Jojobate

ISOPROPYL JOJOBATE

A lightweight ester that conditions skin without leaving a greasy residue

Isopropyl Lanolate

Derived from lanolin, it is used in cosmetics as a texture

Isopropyl Lauroyl Sarcosinate

ISOPROPYL LAUROYL SARCOSINATE

A gentle skin-conditioning agent derived from amino acids and fatty acids

Isopropyl Myristate

Texture enhancer and emollient

Isopropyl Palmitate

Texture enhancer and emollient.

Isopropyl Shea Butterate

ISOPROPYL SHEA BUTTERATE

A lightweight ester that conditions skin while maintaining a smooth, non-greasy feel

Isopropyl Titanium Triisostearate

Used as a surface treatment for cosmetic pigments

Isopropyl Titanium Triisostearate/Triethoxycaprylylsilane Crosspolymer

Synthetic, silicone-enhanced polymer | Formed by combining isopropyl titanium triisostearate and triethoxycaprylylsilane

Isopropyl-Methylphenetole

ISOPROPYL-METHYLPHENETOLE

A fragrance component that adds scent to skincare formulations

Isopropylcarbonate Benzoyl Peroxide

ISOPROPYLCARBONATE BENZOYL PEROXIDE

A stabilised form of benzoyl peroxide designed for acne-prone skin

Isopropylideneglycerol

ISOPROPYLIDENEGLYCEROL

A humectant glycerol derivative that supports skin hydration and moisture retention

Isopropylparaben

ISOPROPYLPARABEN

A paraben preservative that prevents microbial growth in skincare formulations

Isoquercetin

ISOQUERCETIN

A glycosylated flavonoid with antioxidant and soothing potential

Isoquercitrin

ISOQUERCITRIN

A plant-derived antioxidant that helps protect skin from environmental damage

Isosorbide Dicaprylate

ISOSORBIDE DICAPRYLATE

A plant-derived emollient that strengthens the skin barrier and supports hydration

Isostearamide DEA

Used as a cleansing agent

Isostearamide Mipa

ISOSTEARAMIDE MIPA

A multifunctional surfactant that stabilises formulations and reduces static charge

Isostearamidopropyl Ethyldimonium Ethosulfate

ISOSTEARAMIDOPROPYL ETHYLDIMONIUM ETHOSULFATE

A conditioning agent that reduces static and smooths the hair surface

Isosteareth-200 Linoleate

ISOSTEARETH-200 LINOLEATE

A plant-derived emollient that conditions and softens the skin

Isostearic Acid

Fatty acid

Isostearoyl Hydrolyzed Collagen

ISOSTEAROYL HYDROLYZED COLLAGEN

A conditioning agent derived from hydrolysed collagen, designed to improve skin and hair texture

Isostearoyl Hydrolyzed Keratin

ISOSTEAROYL HYDROLYZED KERATIN

A keratin-derived conditioning agent that strengthens and smooths hair and skin

Isostearoyl Hydrolyzed Silk

ISOSTEAROYL HYDROLYZED SILK

A silk-derived conditioning agent that smooths and softens the skin's surface

Isostearyl Alcohol

Emollient— provides long-lasting moisture and softens skin | Viscosity control—helps improve product texture and flow

Isostearyl Glyceryl Ether

ISOSTEARYL GLYCERYL ETHER

A skin-conditioning agent that may enhance how active ingredients penetrate the skin

Isostearyl Isostearate

Liquid emollient ester that helps prevent moisture loss | Improves the texture of makeup products such as lipstick

Isostearyl Neopentanoate

Propanoic acid

Ester of isostearyl alcohol and neopentanoic acid

Isostearyl Palmitate

ISOSTEARYL PALMITATE

An emollient ester that conditions skin, though evidence suggests caution for acne-prone individuals

Isotridecyl Isononanoate

ISOTRIDECYL ISONONANOATE

A lightweight synthetic emollient that conditions and smooths without heaviness

Italica Broccoli Seed Oil

Brassica oleracea italica seed oil

Oil from the broccoli plant Rich in antioxidants and fatty acids

Itraconazole

ITRACONAZOLE

An purifying agent used to address fungal skin and nail infections

Ivermectin

An antiparasitic agent used to address mite-related skin conditions
Shop by ingredient: Vitamin C Retinol Hyaluronic Acid Niacinamide Peptides Ceramides Salicylic Acid Glycolic Acid

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