Tatcha Violet-C Brightening Serum 20% Vitamin C + 10% AHA Versus Olehenriksen C-Rush™ Vitamin C Gel Moisturizer

You might know this ingredient as Ethyl Ascorbic Acid, a more stable version of ascorbic acid.

Glycereth-26 is a synthetic ingredient and polyethylene glycol ether of Glycerin. Glycerin is already naturally found in your skin and helps keep your skin moisturized.

We don't have a description for Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer.

Hydrolyzed Jojoba Esters isn't fungal acne safe.

Cetearyl alcohol is a mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is mainly used as an emulsifier. Emulsifiers help prevent the separation of oils and products. Due to its composition, it can also be used to thicken a product or help create foam.

Polyacrylate Crosspolymer-6 is a texture enhancer and pH adjuster.

Hydroxyacetophenone is antioxidant and helps with skin conditioning.

Panthenol is a common ingredient that helps hydrate and soothe the skin. It can be found naturally in our skin and hair.

Polyglyceryl-3 Methylglucose Distearate is created from the diester of stearic acid and the condensation product of methylglucose and Polyglycerin-3.

Ascorbyl Tetraisopalmitate is a version of ascorbic acid, or pure Vitamin C.

Linoleic Acid is Vitamin F and a fatty acid. It is an emollient and helps thicken texture. Linoleic acid helps with hydrating skin and nourishing the skin's barrier. The top layer of skin, or epidermis, contains high amounts of linoleic acid naturally.

Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.

Parfum is a catch-all term for an ingredient or more that is used to give a scent to products.

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate (long name, huh?) is a synthetic antioxidant.

Xanthan gum is used as a stabilizer and thickener within cosmetic products. It helps give products a sticky, thick feeling - preventing them from being too runny.

Cetearyl Glucoside is a surfactant and emulsifier. It can be produced from synthetic of natural sources of cetearyl alcohol and glucose.

Linolenic Acid is a fatty acid. Our bodies need to consume this to use it. Linolenic Acid helps condition and restore skin. It is also used to treat inflammation and hyperpigmentation.

Citrus Aurantium Dulcis Fruit Extract is more commonly known as the bitter orange. Native to Southeast Asia, this extract is commonly found in both cosmetics and foods.

Citrus Limon Fruit Extract comes from lemons. While lemon extract is exfoliating and antimicrobial, it can also cause skin sensitivity.

Hippophae Rhamnoides Extract comes from the seabuckthorn plant.

Lycium Barbarum Fruit Extract comes from the Goji Berry. Goji berries are native to China and can be found across Eurasia.

Rosa Canina Fruit Extract is from Rosehip. Rosehips are a fruit from a wild rose bush native to Eurasia and Africa.

Ethylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.

Leuconostoc/Radish Root Ferment Filtrate is a natural preservative. It comes from fermenting radish roots with a bacteria called leuconostoc. Leuconostoc comes from lactic acid. This bacteria is used to make the traditional Korean side-dish, kimchi. It is also used to make sourdough bread (both incredibly yummy foods).

Sodium Citrate is the sodium salts of citric acid. In skincare, it is used to alter pH levels and acts as a preservative.

Camellia Japonica Flower Extract comes from the Japanese Camellia plant. This plant is native to East Asia and known as "Tsubaki" in Japanese.

Aroma refers to an ingredient, or mixture of ingredients, that impart or mask a flavor.

Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.

Sodium Polyacrylate is the sodium salt of polyacrylic acid.

Sodium Phytate is the synthetic salt form of phytic acid. Phytic acid is an antioxidant and can be found in plant seeds.

Hyaluronic acid is naturally found in healthy skin. It is a humectant, meaning it draws moisture to your skin.

Collagen is the most abundant type of structural protein found in your body. It is an effective skin moisturizer.

Ascorbic Acid is is pure Vitamin C. This form makes up the largest amount of vitamin C found naturally in our skin.

Tocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.

Ci 15985 is a dye made from petroleum. It is synthetically created and approved by the FDA for use in foods and cosmetics.

CI 19140 is also known as Tartrazine. Tartrazine is a synthetic dye used in cosmetics, foods, and medicine to add a yellow color.

Citral is a fragrance and used to add a lemon-like scent to products. It is both naturally found in plants and created synthetically. In plants, it is commonly occurring in lemon myrtle, lemongrass, lemon tea-tree, lemon verbena, and other citruses.

Limonene is a fragrance that adds scent and taste to a formulation.

Linalool is a fragrance and helps add scent to products. It's derived from common plants such as cinnamon, mint, citrus, and lavender.

Benzyl Alcohol is most commonly used as a preservative. It also has a subtle, sweet smell. Small amounts of Benzyl Alcohol is not irritating and safe to use in skincare products. Most Benzyl Alcohol is derived from fruits such as apricots.