Ingredient Dictionary

Average

N-acetyl-L tyrosine

See tyrosine

Categories: Antioxidants, Skin-Identical/Repairing Ingredients

Average

N6-furfuryladenine

Technical name for kinetin. Read More »

Categories: Plant Extracts, Cell-Communicating Ingredients

Average

nanoparticles

Nanoparticles are microscopic particles whose size is measured in nanometers. In order to get a... Read More »

Categories: Miscellaneous

Average

nanotechnology

A molecular technology that concerns changing any material from its original size and making it... Read More »

Categories: Miscellaneous

Good

NaPCA

See sodium PCA , natural moisturizing factor (NMF)

Categories: Skin-Identical/Repairing Ingredients

Poor

Narcissus poeticus wax

Fragrant flower extract that can cause irritation and dermatitis (Source: www.naturaldatabase.com) Read More »

Categories: Plant Extracts, Irritants, Fragrance: Synthetic and Fragrant Plant Extracts

Good

Nardostachys jatamansi

See spikenard

Categories: Plant Extracts, Antibacterial/Anti-Acne

Average

Nasturtium officinale extract

See watercress extract

Categories: Plant Extracts, Antioxidants

Good

natto gum

Fermentation product of soy protein. It may be a potent antioxidant (Source: Journal of... Read More »

Categories: Antioxidants, Plant Extracts

Average

natural ingredient

The FDA has tried to establish official definitions and guidelines for the use of certain terms... Read More »

Categories: Miscellaneous

Best

natural moisturizing factor (NMF)

One of the primary elements in keeping skin healthy is making sure the structure of the epidermis... Read More »

Categories: Skin-Identical/Repairing Ingredients

Poor

neem extract or oil

Extract from leaves of the neem tree, it has potential toxic effects, although it also has been... Read More »

Categories: Antibacterial/Anti-Acne, Plant Extracts, Irritants

Good

neopentyl glycol dicaprylate/dicaprate

Used as an emollient and thickening agent. Read More »

Categories: Thickeners/Emulsifiers, Emollients

Good

neopentyl glycol diheptanoate

Mixture of neopentyl glycol (film-forming agent and solvent) and heptanoic acid (fatty acid made... Read More »

Categories: Thickeners/Emulsifiers, Film-Forming/Holding Agents

Poor

neroli

See orange blossom

Categories: Fragrance: Synthetic and Fragrant Plant Extracts, Plant Extracts, Irritants

Poor

neroli oil

Fragrant plant oil that can be a skin irritant and sensitizer. Read More »

Categories: Plant Extracts, Fragrance: Synthetic and Fragrant Plant Extracts, Irritants

Average

nettle extract

Extract that may have anti-inflammatory properties (Source: Healthnotes Review of Complementary and... Read More »

Categories: Anti-Irritants, Plant Extracts

Best

niacin

See niacinamide

Categories: Cell-Communicating Ingredients, Vitamins

Best

niacinamide

Also known as vitamin B3 and nicotinic acid, niacinamide is a potent cell-communicating ingredient... Read More »

Categories: Antioxidants, Vitamins, Anti-Irritants, Cell-Communicating Ingredients

Best

nicotinamide

See niacinamide

Categories: Cell-Communicating Ingredients, Vitamins

Best

nicotinic acid

See niacinamide

Categories: Cell-Communicating Ingredients, Vitamins

Poor

nitrogen

Used as a propellant in cosmetic products; as nitric oxide, it can generate free-radical damage and... Read More »

Categories: Miscellaneous

Good

noni juice

Also known as morinda or Morinda citrifolia, comes from a small evergreen tree. The juice from this... Read More »

Categories: Plant Extracts, Antioxidants, Anti-Irritants

Good

nonoxynols

Used as mild surfactants. Read More »

Categories: Surfactants/Detergent Cleansing Agents

Best

nordihydroguaiaretic acid

Component of some plants that has been shown to have anticancer properties for skin and that may... Read More »

Categories: Antioxidants, Plant Extracts

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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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