Ingredient Dictionary

Poor

Ranunculus ficaria extract

Extract that may have antibacterial and antifungal properties and that is used in the treatment of... Read More »

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

Best

rapeseed oil

Nonfragrant oil that has emollient and potential antioxidant properties for skin (Source: British... Read More »

Categories: Plant Extracts, Antioxidants, Emollients

Good

raspberry seed extract

See red raspberry extract

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

Good

raspberry seed oil

See red raspberry extract

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

Good

red 27 lake

See D&C colors

Categories: Coloring Agents/Pigments

Good

red 33

See D&C colors

Categories: Coloring Agents/Pigments

Good

red 6 lake

See D&C colors

Categories: Coloring Agents/Pigments

Good

red algae

See algae

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

Good

red clover

Can have antioxidant and anti-inflammatory properties (Source: Photochemistry and Photobiology,... Read More »

Categories: Plant Extracts, Anti-Irritants, Antioxidants

Good

red raspberry extract

Fruit extract that has potent antioxidant properties (Source: Journal of Agricultural Food... Read More »

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

Poor

red sandalwood

Has a phytoestrogen component (Source: Phytochemistry, March 2000, pages 605–606), but can also be... Read More »

Categories: Plant Extracts, Irritants

Good

reducing agent

Versatile ingredient composed of several non-volatile alcohols. Functions as a skin-conditioning... Read More »

Categories: Surfactants/Detergent Cleansing Agents, Thickeners/Emulsifiers

Best

Renova

See Retin-A , tretinoin

Categories: Vitamins, Prescription Drugs, Cell-Communicating Ingredients

Poor

resorcinol

Considered an effective topical disinfectant in concentrations of 1% to 3% (Source: www.fda.gov).... Read More »

Categories: Irritants, Antibacterial/Anti-Acne

Best

resveratrol

Potent polyphenolic antioxidant that is abundant in red grapes and, therefore, in red wine... Read More »

Categories: Antioxidants, Anti-Irritants, Plant Extracts

Best

Retin-A

One of several prescription-only drugs (others include Renova, Retin-A Micro, and Avita) that... Read More »

Categories: Vitamins, Cell-Communicating Ingredients, Prescription Drugs

Best

retinoids

Large group of over 2,500 chemicals related to vitamin A. Topical, over-the-counter retinoids... Read More »

Categories: Vitamins, Cell-Communicating Ingredients, Prescription Drugs

Best

retinol

The name for the entire vitamin A molecule. Retinol has value for skin on several fronts: it is a... Read More »

Categories: Cell-Communicating Ingredients, Antioxidants, Vitamins

Best

retinyl palmitate

Form of vitamin A. It is a combination of retinol (pure vitamin A) and palmitic acid. There is... Read More »

Categories: Vitamins, Antioxidants, Cell-Communicating Ingredients

Average

riboflavin

See vitamin B2

Categories: Irritants, Vitamins

Good

rice bran oil

Emollient oil similar to other nonfragrant plant oils. There is no research showing this has any... Read More »

Categories: Emollients, Plant Extracts

Good

rice oil

Emollient similar to other nonfragrant plant oils. There is no research showing this has any... Read More »

Categories: Emollients, Plant Extracts

Good

rice starch

Absorbent substance sometimes included in products rather than talc. It can cause allergic... Read More »

Categories: Absorbent, Plant Extracts

Good

ricinoleate

Glyceryl triester used in cosmetics as a thickening agent and emollient. Read More »

Categories: Thickeners/Emulsifiers

Good

Ricinus communis

See castor oil

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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