Ingredient Dictionary



See coenzyme Q10

Categories: Anti-Irritants, Antioxidants


Ulmus fulva bark extract

See slippery elm bark

Categories: Plant Extracts, Anti-Irritants



Inorganic pigments (of various colors) permanently listed by the FDA for external use only,... Read More »

Categories: Coloring Agents/Pigments


Ulva lactuca extract

Extract from the plant known as sea lettuce, it has some anti-inflammatory and antioxidant... Read More »

Categories: Anti-Irritants, Plant Extracts, Antioxidants


Uncaria tomentosa extract

Also known as Cat’s Claw, there is some research showing it to be an effective anti-inflammatory... Read More »

Categories: Plant Extracts


Undaria pinnatifida

Form of brown algae. Read More »

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


undecylenoyl phenylalanine

A white powder composed of amino acids and fatty acids. It appears to have a positive impact on... Read More »

Categories: Miscellaneous



Component of urine, although synthetic versions are used in cosmetics. In small amounts urea has... Read More »

Categories: Leave-On Exfoliant, Skin-Identical/Repairing Ingredients


Urtica dioica

See nettle extract

Categories: Anti-Irritants, Plant Extracts



Ultraviolet A radiation. The sun produces a range of ultraviolet (UV) radiation, of which UVA and... Read More »

Categories: Miscellaneous


Uva ursi extract

See bearberry extract , arbutin

Categories: Plant Extracts, Antibacterial/Anti-Acne



Ultra-violet B radiation. Read More »

Categories: Miscellaneous

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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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