Cosmetic Chemistry Glossary
A comprehensive guide to the ingredients and terminology used in our products.
A
Absorbent
An ingredient designed to soak up excess oil, moisture, or impurities from the skin. Often used in products for oily or acne-prone skin, such as powders and masks. Examples include clays (kaolin, bentonite) and starches.
Acid Mantle
A very fine, slightly acidic film on the surface of human skin, acting as a barrier to bacteria, viruses, and other potential contaminants that might penetrate the skin.
Active Ingredient
The component in a cosmetic product responsible for delivering the primary therapeutic or aesthetic benefit, as distinguished from inactive or excipient ingredients. (e.g., salicylic acid for acne, retinol for anti-aging).
Adjuvant
An ingredient added to a cosmetic formulation to enhance the efficacy or performance of another active ingredient, often by improving its stability, penetration, or spreadability.
Alpha Hydroxy Acids (AHAs)
A class of water-soluble acids derived from sugary fruits. They work by exfoliating the top layer of skin, helping to improve skin tone, texture, and clarity. Common examples include glycolic acid, lactic acid, and citric acid.
Antioxidants
Molecules that protect the skin from damage caused by free radicals, which are unstable atoms that can harm cells. Antioxidants help to prevent premature aging and support overall skin health. Examples include Vitamin C, Vitamin E, and green tea extract.
Astringent
A substance that causes the contraction of skin tissues and blood vessels, often used in skincare to tighten pores and reduce oiliness. Common astringents include witch hazel and alcohol.
B
Bacteriostat
An agent that inhibits the growth or reproduction of bacteria without necessarily killing them. Used in cosmetics to maintain product hygiene and extend shelf life.
Barrier Function
The outermost layer of the skin (stratum corneum) which acts as a protective shield against environmental aggressors and prevents excessive water loss. Maintaining a healthy barrier function is crucial for skin hydration and protection.
Bentonite Clay
A natural absorbent clay, formed from volcanic ash, known for its ability to draw out impurities and toxins from the skin. It's commonly used in purifying masks for oily and acne-prone skin.
Beta Hydroxy Acids (BHAs)
Oil-soluble acids that can penetrate deep into pores to exfoliate and dissolve sebum. They are particularly effective for treating acne, blackheads, and oily skin. The most common BHA is salicylic acid.
Binder
An ingredient that helps hold the components of a cosmetic product together. In pressed powders like eyeshadows or blushes, binders ensure that the pigments and fillers don't crumble and stay in a solid form.
Bio-fermentation
A process using microorganisms to break down and transform ingredients, often resulting in enhanced bioavailability, increased potency, or the creation of new beneficial compounds in cosmetic formulations.
Botanical Extract
Concentrated ingredients derived from plants, fruits, herbs, or flowers. These extracts often contain beneficial compounds like antioxidants, vitamins, and anti-inflammatory agents that can nourish and protect the skin.
C
Caking
The undesirable aggregation of powdered cosmetic ingredients into lumps or a solid mass, often due to moisture or compression, impacting product texture and application.
Carbomer
A common thickening agent and emulsion stabilizer used in gels, creams, and lotions. It creates a smooth texture and helps prevent ingredients from separating.
Carrier Oil
A vegetable oil used to dilute essential oils or other active ingredients before they are applied to the skin. They "carry" the essential oil onto the skin and often have their own therapeutic properties. Examples include jojoba oil, almond oil, and grapeseed oil.
Ceramides
Lipids (fats) that are naturally found in the skin's outer layer. They play a crucial role in maintaining the skin's barrier function, helping to retain moisture and protect against environmental aggressors. Ceramides are often used in products to support skin hydration and health.
Chelating Agents
Ingredients used to improve the stability and performance of a product by binding to metal ions that may be present in water. This prevents the ions from reacting with other ingredients, which could cause a product to spoil or change color over time.
Collagen
The most abundant protein in the skin, responsible for its structure, firmness, and elasticity. In cosmetics, hydrolyzed collagen is often used for its hydrating and film-forming properties.
Coenzyme Q10 (CoQ10)
A naturally occurring antioxidant in the body that helps to protect cells from damage and plays a role in energy production. In cosmetics, it's used to reduce the appearance of fine lines and wrinkles and improve skin elasticity.
Comedogenic
Describes ingredients or products that tend to clog pores, potentially leading to the formation of blackheads, whiteheads, and acne. Opposite of non-comedogenic.
Cosmeceutical
A portmanteau of "cosmetic" and "pharmaceutical." It refers to cosmetic products that contain biologically active ingredients and are believed to have medicinal or drug-like benefits, such as improving skin texture or reducing the appearance of wrinkles.
D
Deionized Water
Water that has had its mineral ions (like sodium, calcium, iron, copper, chloride, and bromide) removed through a special purification process. It's often used as the primary solvent in cosmetic formulations to ensure product stability and prevent unwanted reactions with other ingredients.
Denatured Alcohol
Alcohol that has been made unsuitable for drinking by adding other ingredients. In cosmetics, it's sometimes used as a solvent, an astringent, or to make products feel lighter on the skin. However, it can also be drying and irritating for some skin types.
Derma-filler
Injectable substances, often based on hyaluronic acid or collagen, used to restore volume, smooth wrinkles, and enhance facial contours. While a procedure, the underlying chemistry of the fillers themselves is relevant to cosmetic science.
Dermatologically Tested
Indicates that a product has been tested on human skin by dermatologists to assess its potential for irritation or allergic reactions. It does not guarantee a product is hypoallergenic but suggests it has undergone testing for skin safety.
Dimethicone
A common silicone-based polymer used as an emollient, skin protectant, and conditioning agent in many cosmetic formulations. It forms a breathable barrier on the skin, providing a smooth feel and helping to reduce transepidermal water loss.
Dispersant
An ingredient that helps to evenly distribute solid particles within a liquid or semi-solid formulation. In cosmetics, dispersants are essential for ensuring that pigments or other insoluble ingredients are uniformly spread throughout a product, preventing clumping or settling.
Dry Oil
A type of oil that absorbs quickly into the skin without leaving a greasy residue. These oils are typically rich in polyunsaturated fatty acids. Examples include grapeseed oil, sunflower oil, and squalane.
D-Panthenol (Pro-Vitamin B5)
A derivative of vitamin B5, known for its hydrating, soothing, and healing properties. It helps to improve skin elasticity, reduce inflammation, and promote barrier repair in various cosmetic products.
E
Ecological Footprint (Cosmetic)
A measure of the environmental impact of a cosmetic product, from raw material sourcing and manufacturing to packaging, transport, and disposal, including factors like carbon emissions, water usage, and waste generation.
Elastin
A protein found in connective tissues of the body, including the skin. It is responsible for the elasticity and resilience of the skin, allowing it to stretch and return to its original shape. Cosmetic ingredients often aim to support natural elastin production.
Emollient
An ingredient that softens and smooths the skin by filling in gaps between skin cells, creating a protective film that helps to prevent moisture loss. Examples include fatty acids, fatty alcohols, and esters.
Emulsifier
A substance that helps to mix two immiscible liquids, such as oil and water, to create a stable emulsion (e.g., a cream or lotion). Without emulsifiers, oil and water phases would separate.
Encapsulation
A technique used to enclose active cosmetic ingredients within a protective shell or matrix. This can improve ingredient stability, control release over time, enhance penetration, or reduce irritation.
Essential Fatty Acids (EFAs)
Fatty acids (like linoleic acid and alpha-linolenic acid) that the human body cannot produce on its own and must be obtained through diet or topical application. They are crucial for maintaining healthy skin barrier function and reducing inflammation.
Excipient
An inactive ingredient used as a diluent, vehicle, binder, or other component in a cosmetic formulation to facilitate the manufacturing process or improve product aesthetics, stability, or performance without providing direct therapeutic action.
Exfoliant
An ingredient or product designed to remove dead skin cells from the skin's surface. Exfoliants can be physical (scrubs) or chemical (AHAs, BHAs).
F
Fatty Acid
Organic compounds that are the building blocks of fats and oils. In cosmetics, they act as emollients, moisturizers, and sometimes as emulsifiers. Examples include stearic acid and linoleic acid.
Fatty Alcohol
Unlike drying alcohols, fatty alcohols are typically derived from natural fats and oils and are used in cosmetics as emollients, emulsifiers, and thickeners. Examples include cetyl alcohol and stearyl alcohol.
Film-Former
An ingredient that creates a thin, continuous film on the skin or hair. This film can provide various benefits, such as water resistance, increased hold (in hair products), or a smoother feel. Examples include various polymers.
Fixative
An ingredient used in fragrances to reduce the evaporation rate of volatile aroma compounds, making the scent last longer on the skin or in the product.
Flavonoids
A diverse group of plant metabolites known for their antioxidant and anti-inflammatory benefits. They help protect skin from environmental damage and can contribute to a healthier complexion.
Flocculation
The process where particles in a liquid aggregate into larger masses (flocs), often leading to separation in cosmetic emulsions or suspensions.
Fragrance
A complex mixture of natural or synthetic aromatic chemicals used in cosmetics to impart a pleasant scent, mask odors, or enhance the sensory experience of a product.
G
Gel
A semi-solid colloidal system formed by a network of particles or polymers that entraps a liquid phase, commonly used in cosmetics for lightweight textures and quick absorption.
Gelling Agent
A substance used in cosmetic formulations to create a gel-like consistency by forming a network that traps liquid. This helps to thicken products and improve their texture and stability.
Glycerin (Glycerol)
A common humectant, a type of moisturizing agent that draws water from the air into the skin's outer layer. It helps to keep skin hydrated, soft, and supple.
Glucosamine
An amino sugar that can help support the skin's natural hyaluronic acid production and improve hydration and elasticity, often found in supplements and skincare for joint and skin health.
Glutathione
A powerful antioxidant naturally produced in the body, known for its skin-brightening and anti-aging properties. It helps to protect cells from oxidative stress.
Glycolic Acid
The smallest of the Alpha Hydroxy Acids (AHAs), derived from sugar cane. It is highly effective for exfoliating the skin, improving texture, and reducing the appearance of fine lines and hyperpigmentation.
Green Chemistry
A philosophy and approach to chemical design that aims to minimize the use and generation of hazardous substances throughout the lifecycle of chemical products, promoting more sustainable cosmetic manufacturing.
Growth Factors
Proteins that stimulate cell growth, proliferation, healing, and differentiation. In cosmetics, synthetic or plant-derived growth factors are sometimes used to promote skin regeneration and reduce signs of aging.
H
Heavy Metals (Cosmetics)
Naturally occurring metallic elements that can be present as trace impurities in some raw materials used in cosmetics (e.g., lead, arsenic, mercury). Regulatory bodies set limits to ensure product safety.
Humectant
An ingredient that attracts and binds water from the environment to the skin, helping to keep it hydrated and supple. Common humectants include glycerin, hyaluronic acid, and sorbitol.
Hydration
The process of increasing water content in the skin, essential for maintaining its plumpness, elasticity, and healthy barrier function. Achieved through humectants and proper skincare routines.
Hydrocolloids
Gums or polymers that form gels in water. They are used as thickeners, emulsifiers, and stabilizers in cosmetic formulations.
Hydrophilic
Meaning "water-loving," this describes ingredients that are attracted to and dissolve in water. Many humectants and emulsifiers are hydrophilic.
Hydrophobic
Meaning "water-fearing," this describes ingredients that repel water and do not dissolve in it, such as most oils, waxes, and silicones. These are often used to create protective barriers on the skin.
Hyaluronic Acid (HA)
A powerful humectant naturally found in the skin. It can hold up to 1,000 times its weight in water, making it excellent for hydrating the skin, plumping fine lines, and improving elasticity.
I
INCI Name
International Nomenclature Cosmetic Ingredient (INCI) names are standardized, internationally recognized names for cosmetic ingredients. They ensure consistent labeling worldwide and are legally required on product packaging in many regions.
Ingredient List
A comprehensive listing of all components present in a cosmetic product, typically ordered by concentration from highest to lowest, using their INCI names. Essential for transparency and consumer information.
Irritant
A substance that can cause skin irritation, redness, itching, burning, or discomfort upon contact. Irritants may affect people differently based on skin sensitivity and concentration.
Irritation
A common skin reaction characterized by redness, itching, burning, or stinging, often caused by certain ingredients, environmental factors, or product misuse. It's a non-allergic inflammatory response.
Isostearyl Isostearate
An ester often used as an emollient and skin-conditioning agent. It helps to provide a smooth, soft feel to the skin and can enhance the spreadability of products.
J
Jasmine Extract
A botanical extract derived from jasmine flowers, known for its soothing properties and delicate fragrance. It's often used to calm and condition the skin, and for its aromatic benefits in various cosmetic formulations.
Jelly Texture
A lightweight, often translucent, and sometimes bouncy product texture, typically achieved with gelling agents. Popular for its refreshing feel and quick absorption, especially in serums and masks.
Jojoba Esters
Derived from jojoba oil, these provide emollient properties and a smooth, non-greasy feel to products, often used in lip balms, creams, and makeup.
Jojoba Oil
A liquid wax extracted from the seeds of the jojoba plant. It closely resembles the natural sebum produced by human skin, making it a popular emollient and moisturizer that is well-tolerated by most skin types, including oily and acne-prone skin.
K
Kaolin Clay
A natural, soft white clay often used in masks and cleansers. It is known for its absorbent properties, helping to draw out impurities and excess oil from the skin without being overly drying.
Keratin
A fibrous protein that is the main structural component of skin, hair, and nails. In cosmetics, keratin (often hydrolyzed) is used in hair and nail products to strengthen and improve their condition.
Kinetin
A plant-derived growth factor that acts as an antioxidant and can help improve skin texture, reduce wrinkles, and even out skin tone, often used in anti-aging formulations.
Kojic Acid
A natural skin-lightening agent derived from fungi, used to reduce hyperpigmentation, dark spots, and uneven skin tone by inhibiting melanin production.
L
Lactic Acid
An Alpha Hydroxy Acid (AHA) derived from milk, fruit, or vegetables. It's a gentler exfoliant than glycolic acid and also functions as a humectant, making it suitable for sensitive or dry skin.
Lanolin
A natural wax derived from sheep's wool, widely used as an emollient and occlusive in moisturizing products. It forms a protective barrier on the skin to prevent water loss and soften rough skin.
Lecithin
A natural phospholipid, often derived from soy or sunflower, widely used as an emulsifier and emollient in cosmetics. It helps to hydrate, soften, and smooth the skin.
Light Diffusers
Ingredients (often fine powders or silicones) that subtly scatter light on the skin's surface. This effect can help to visually blur imperfections, reduce the appearance of fine lines, and create a softer, more even complexion.
Lipid
A broad group of naturally occurring molecules that includes fats, waxes, sterols, and fat-soluble vitamins. Lipids are essential for maintaining the skin's barrier function and moisture levels.
Liposomes
Spherical vesicles composed of a lipid bilayer, used in cosmetics to encapsulate and deliver active ingredients to the skin. They can improve ingredient stability and penetration.
Lubricant
An ingredient that reduces friction between surfaces, providing a smooth, slippery feel to cosmetic products. Common lubricants include silicones and esters.
M
Melanin
The pigment responsible for skin, hair, and eye color. It provides natural protection against UV radiation, but overproduction can lead to hyperpigmentation.
Microbiome (Skin Microbiome)
The community of microorganisms (bacteria, fungi, viruses) that live on the skin's surface. A balanced skin microbiome is important for skin health, immunity, and protection against pathogens. Probiotic and prebiotic skincare aims to support this balance.
Microencapsulation
A specific type of encapsulation where very small particles or droplets are surrounded by a coating, often used for controlled release or protection of delicate active ingredients.
Micellar Water
A gentle cleansing product made of "micelles" (tiny oil molecules) suspended in soft water. These micelles attract oil and dirt, effectively cleansing the skin without harsh rubbing or requiring rinsing.
Micronization
A process of reducing the particle size of solid ingredients to the micrometer range, often to improve their spreadability, texture, or efficacy in formulations (e.g., mineral-based sunscreens).
Mineral Oil
A highly refined, colorless, and odorless liquid hydrocarbon derived from petroleum. It is a common occlusive agent in cosmetics, forming a protective barrier on the skin to prevent moisture loss. It is non-comedogenic for most people.
Mineral-Based Sunscreen
Sunscreens that use mineral active ingredients, specifically Zinc Oxide and Titanium Dioxide, to physically block UV rays by sitting on top of the skin and reflecting sunlight.
Moisturizer
A cosmetic product designed to hydrate and protect the skin. Moisturizers typically contain a combination of humectants, emollients, and occlusives to draw in, soften, and seal in moisture.
N
Nano-emulsion
An emulsion with extremely small droplet sizes (typically in the nanometer range), which can enhance the penetration and bioavailability of active ingredients in skincare formulations.
Natural Moisturizing Factors (NMFs)
A group of humectant and emollient components naturally found within the skin. They are crucial for maintaining adequate hydration in the stratum corneum (outermost layer of skin). Examples include amino acids, urea, and ceramides.
Niacinamide (Vitamin B3)
A versatile ingredient that offers multiple benefits for the skin, including reducing inflammation, improving barrier function, minimizing the appearance of pores, regulating oil production, and evening out skin tone.
Non-comedogenic
A term used to describe products or ingredients that are formulated not to clog pores, thereby reducing the likelihood of breakouts and acne. This is particularly important for individuals with oily or acne-prone skin.
O
Occlusive
An ingredient that forms a protective, water-repellent layer on the skin's surface, preventing transepidermal water loss (TEWL) and sealing in moisture. Examples include petrolatum, mineral oil, and silicones.
Oil-in-Water Emulsion
A common type of emulsion where tiny droplets of oil are dispersed within a continuous water phase. These are typically lighter, less greasy, and absorb more quickly into the skin (e.g., lotions and lightweight creams).
Omega Fatty Acids
Essential fatty acids (like Omega-3 and Omega-6) that the body cannot produce on its own. They are vital for healthy skin barrier function, reducing inflammation, and maintaining skin hydration. Found in oils like linoleic acid and alpha-linolenic acid.
Organic (Ingredients)
Refers to ingredients that are grown and processed without synthetic pesticides, genetically modified organisms (GMOs), or chemical fertilizers, often certified by specific organic standards.
Oxidation
A chemical reaction involving the loss of electrons. In cosmetics, oxidation can lead to product degradation (e.g., changes in color or smell) or, on the skin, can contribute to cellular damage from free radicals.
P
Paraben
A class of preservatives commonly used in cosmetics and personal care products to prevent the growth of bacteria, yeasts, and molds. Common parabens include methylparaben, propylparaben, and butylparaben.
Peptides
Short chains of amino acids, which are the building blocks of proteins like collagen and elastin. In skincare, various types of peptides are used to signal the skin to produce more collagen, improve firmness, and reduce wrinkles.
pH (Potential of Hydrogen)
A measure of the acidity or alkalinity of a substance, on a scale of 0 to 14. Skin's natural pH is slightly acidic (around 4.5-5.5). Products formulated at a similar pH help maintain skin barrier health.
Photostability
The ability of an ingredient or product to resist degradation or chemical change when exposed to light, particularly UV radiation. Crucial for ingredients like antioxidants and retinoids.
Polymers
Large molecules made up of repeating smaller units. In cosmetics, polymers are used for various purposes, including film-forming, thickening, suspending, and conditioning agents for skin and hair.
Prebiotic
Ingredients that selectively nourish beneficial microorganisms on the skin's surface, helping to maintain a healthy skin microbiome. Examples include certain sugars and plant extracts.
Preservative
An ingredient added to cosmetic products to prevent the growth of microorganisms (bacteria, fungi, yeast), ensuring product safety and extending shelf life.
Probiotic
Beneficial live microorganisms (or their lysates/ferments) used in skincare to help balance the skin microbiome, support barrier function, and soothe irritation.
Q
Quality Control (QC)
A system of maintaining standards in manufactured cosmetic products by testing a sample of the output against the specification, ensuring consistency, safety, and efficacy.
Quercetin
A potent plant-derived antioxidant with anti-inflammatory properties, often found in fruits and vegetables. In skincare, it's used to protect skin from environmental damage and soothe irritation.
Quaternium Compounds
A group of cationic surfactants often used as conditioning agents in hair products, helping to detangle and smooth hair. Some variations are also used as preservatives.
R
Reducing Agent
A substance that causes another substance to gain electrons, often used in cosmetics (e.g., permanent waving solutions) to chemically alter hair bonds or as a component in antioxidant systems.
Resveratrol
A powerful antioxidant found in grapes, berries, and nuts, known for its anti-aging properties. It helps protect against oxidative stress, supports collagen production, and can improve skin's overall appearance.
Retinoids
A class of vitamin A derivatives widely used in skincare for their anti-aging and anti-acne benefits. They work by promoting cell turnover, stimulating collagen production, and reducing inflammation. Examples include retinol, retinaldehyde, and tretinoin.
Rheology Modifiers
Ingredients that alter the flow properties or viscosity of a cosmetic product. They can make a product thicker, thinner, or more stable, influencing its texture, feel, and spreadability.
Rosehip Oil
An oil extracted from the seeds of rose bushes. Rich in essential fatty acids and vitamins, it's known for its skin-regenerating, anti-inflammatory, and hydrating properties, often used to improve skin tone and texture and reduce scars.
S
Salicylic Acid
A Beta Hydroxy Acid (BHA) known for its ability to penetrate oil and exfoliate inside the pore. It's highly effective for treating acne, blackheads, and oily skin due to its anti-inflammatory and keratolytic (exfoliating) properties.
Saponification
A chemical reaction in which a triglyceride (fat or oil) reacts with a strong alkali (like lye) to form soap and glycerin. This is the fundamental process for making traditional bar soaps.
Sebum
An oily, waxy substance produced by the skin's sebaceous glands. It helps to lubricate and waterproof the skin and hair. Overproduction can lead to oily skin and acne.
Silicones
A group of synthetic polymers known for their smooth, silky texture. In cosmetics, they are used as emollients, film-formers, and to provide a "slip" to products, making them easy to apply. Examples include dimethicone and cyclomethicone.
Solvent
A substance, usually a liquid, that can dissolve other substances (solutes) to form a solution. In cosmetics, water, alcohol, and various oils act as solvents for different ingredients.
SPF (Sun Protection Factor)
A measure of a sunscreen's ability to protect skin from UVB rays, which cause sunburn. A higher SPF indicates greater protection against UVB. It's crucial for preventing sun damage and premature aging.
Stabilizer
An ingredient added to a cosmetic formulation to maintain its physical and chemical properties over time, preventing degradation, separation, or changes in color/texture.
Squalane
A stable, saturated hydrocarbon derived from squalene, a natural component of skin sebum. It's an excellent emollient and moisturizer, providing hydration and softening the skin without feeling greasy.
Surfactant
Short for "surface-active agent." Surfactants reduce the surface tension between liquids, or between a liquid and a solid. In cosmetics, they act as cleansers, emulsifiers, and foaming agents.
Suspension
A cosmetic formulation where solid particles are finely dispersed in a liquid medium but not dissolved. Thickeners and stabilizers are crucial to prevent settling.
T
Thickeners (Viscosity Modifiers)
Ingredients used to increase the viscosity (thickness) of a cosmetic product. They can improve product texture, stability, and application experience. Examples include gums (xanthan gum), cellulose derivatives, and carbomers.
Titanium Dioxide
A mineral UV filter used in physical sunscreens, providing broad-spectrum protection against both UVA and UVB rays by reflecting and scattering UV radiation. It can also be used as a white pigment.
Tocopherol (Vitamin E)
A potent antioxidant that helps protect the skin from damage caused by free radicals and UV radiation. It also has moisturizing and healing properties, often used to improve skin barrier function.
Toner
A liquid skincare product designed to remove any remaining traces of cleanser, balance the skin's pH, and prepare it for subsequent treatments. Can contain various active ingredients.
Transepidermal Water Loss (TEWL)
The process by which water evaporates from the skin's surface into the atmosphere. High TEWL indicates a compromised skin barrier, leading to dehydration. Occlusives and emollients help to reduce TEWL.
U
Ubiquinone
Also known as Coenzyme Q10 (CoQ10), this is a powerful antioxidant naturally present in skin. It helps protect against oxidative stress and aids in cellular energy production, reducing visible signs of aging.
Undecylenic Acid
A fatty acid with antifungal and antimicrobial properties, often used in topical products to help treat various skin conditions, particularly those caused by fungal overgrowth.
Unsaturated Fatty Acids
Fatty acids that contain one or more double bonds in their carbon chain. They are often liquid at room temperature and include essential fatty acids like linoleic acid, important for skin barrier health.
Urea
A humectant and keratolytic agent naturally found in the skin as part of the Natural Moisturizing Factors (NMFs). In cosmetics, it's used to hydrate, exfoliate, and smooth rough skin, particularly in products for dry, cracked, or calloused areas.
UV Filters (Sunscreen Agents)
Ingredients that protect the skin from harmful ultraviolet (UV) radiation from the sun. They can be physical (mineral, like zinc oxide and titanium dioxide) or chemical (organic compounds that absorb UV rays).
V
Vegan Cosmetics
Cosmetic products that do not contain any animal-derived ingredients or by-products. This means no beeswax, honey, lanolin, carmine, collagen, or gelatin, among others.
Viscosity
A measure of a fluid's resistance to flow. In cosmetics, viscosity refers to how thick or thin a product is. It impacts texture, spreadability, and stability.
Vitamin C (Ascorbic Acid)
A powerful antioxidant vital for skin health. It helps protect against environmental damage, stimulates collagen production, brightens skin tone, and reduces the appearance of hyperpigmentation.
Volatile Silicones
A type of silicone that evaporates quickly after application, providing a temporary smooth feel and helping other ingredients spread without leaving a heavy residue. Examples include dimethicone and cyclomethicone.
Vitamins
Organic compounds essential in small quantities for normal metabolism, growth, and body function. In cosmetics, vitamins (e.g., C, E, B3, B5) are often used as antioxidants, hydrators, or skin conditioners.
W
Water Activity (aw)
A measure of the unbound water available in a cosmetic product, which can support microbial growth. Controlling water activity is crucial for effective preservation and product stability.
Water-in-Oil Emulsion
A type of emulsion where tiny droplets of water are dispersed within a continuous oil phase. These tend to be richer, heavier, and more occlusive, often used in creams for very dry skin or night creams.
Water-Soluble
Describes ingredients that dissolve or disperse readily in water. Many active ingredients, humectants, and some thickeners are water-soluble, making them suitable for water-based formulations.
Waxes
Natural or synthetic substances used in cosmetics to provide texture, increase viscosity, and offer occlusive properties. Examples include beeswax, carnauba wax, and synthetic waxes, often found in balms, lipsticks, and solid formulations.
Witch Hazel
An extract from the witch hazel plant, often used in toners and astringents. It has natural astringent, anti-inflammatory, and antioxidant properties, helping to soothe skin and reduce oiliness.
X
Xanthan Gum
A natural polysaccharide produced by fermentation, widely used as a thickener, stabilizer, and emulsifier in cosmetics. It creates gels and helps prevent ingredient separation in creams and lotions.
Xylitol
A sugar alcohol used as a humectant in some cosmetic formulations, helping to attract and retain moisture in the skin, often found in oral care and moisturizing products.
Xyloglucan
A polysaccharide derived from plants, used as a film-former and moisturizing agent in skincare products. It can help improve skin hydration and provide a smooth feel.
Y
Yeast Extract
A rich source of proteins, vitamins, and amino acids derived from yeast. In skincare, it's valued for its soothing, hydrating, and antioxidant properties, often used to improve skin vitality.
Yellow 5 (FD&C Yellow 5)
A synthetic yellow dye (also known as Tartrazine) commonly used in cosmetics, personal care products, and foods to impart a vibrant yellow color to formulations.
Z
Zeolite
A natural mineral with porous, absorbent properties, sometimes used in masks or cleansers to help detoxify and purify the skin by absorbing excess oil, toxins, and impurities.
Zinc Oxide
A mineral UV filter used in physical sunscreens. It provides broad-spectrum protection against both UVA and UVB rays by creating a physical barrier on the skin. It also has soothing and anti-inflammatory properties.