Ingredient Dictionary

Good

kaolin

Naturally occurring clay mineral (silicate of aluminum) that is used in cosmetics for its absorbent... Read More »

Categories: Absorbent

Poor

Kathon CG

See methylisothiazolinone , methylchloroisothiazolinone

Categories: Irritants, Preservatives

Poor

kava-kava extract

Extract of the Piper methysticum plant that has analgesic (anti-inflammatory) properties, but can... Read More »

Categories: Plant Extracts, Irritants, Anti-Irritants

Poor

kawa extract

See kava-kava extract

Categories: Anti-Irritants, Plant Extracts, Irritants

Good

kelp extract

See algae

Categories: Antioxidants, Thickeners/Emulsifiers, Emollients, Plant Extracts

Average

Kigelia africana extract

Extract of African plant commonly known as the sausage tree. The African lore about this extract is... Read More »

Categories: Plant Extracts, Anti-Irritants, Antioxidants

Average

kinetin

Trade name N6-furfuryladenine, a plant hormone responsible for cell division. As a “natural”... Read More »

Categories: Plant Extracts, Cell-Communicating Ingredients

Average

kiwi fruit extract

As a food, kiwi has significant antioxidant properties that may even be greater than those of... Read More »

Categories: Irritants, Antioxidants, Plant Extracts

Good

kojic acid

By-product of the fermentation process of malting rice for use in the manufacture of sake, Japanese... Read More »

Categories: Antioxidants

Good

kojic dipalmitate

A mixture of kojic acid and palmitic acid. It functions as a skin-conditioning agent and antioxidant... Read More »

Categories: Antioxidants

Average

kola nut

One of the major components of the kola nut is caffeine, which can be a skin irritant. However,... Read More »

Categories: Plant Extracts, Irritants

Best

kudzu root

Source of isoflavone, genistein, and daidzein, all plant estrogens (Sources: Phytochemistry, June... Read More »

Categories: Antioxidants, Plant Extracts

Best

kukui nut oil

Non-volatile oil from a plant native to Hawaii; it has emollient properties for skin (Source:... Read More »

Categories: Plant Extracts, Emollients

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About the Experts

Paula Begoun is the best-selling author of 20 books on skin care and makeup. She is known worldwide as the Cosmetics Cop and creator of Paula's Choice. Paula's expertise has led to hundreds of appearances on national and international television including:

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The Paula's Choice Research Team is dedicated to helping you find the absolute best products for your skin, using research-based criteria to review beauty products from an honest, balanced perspective. Each member of the team was personally trained by Paula herself.

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