Ingredient Dictionary

Average

Thymus vulgaris

See thyme extract

Categories: Irritants, Antioxidants, Plant Extracts

Poor

Thymus serpillum extract

Extract of wild thyme. Read More »

Categories: Plant Extracts, Antioxidants, Irritants

Poor

thyme oil

The most concentrated part of the thyme plant, and a potent source of antioxidants, some of which... Read More »

Categories: Plant Extracts, Irritants, Antioxidants

Average

thyme extract

Extract derived from the leaf or flower of the thyme plant. It can have potent antioxidant... Read More »

Categories: Antioxidants, Irritants, Plant Extracts

Best

Theobroma cacao seed butter

See cocoa butter

Categories: Emollients, Plant Extracts

Best

tetrahydrodemethoxycurcumin

See turmeric , curcumin

Categories: Anti-Irritants, Plant Extracts, Antioxidants

Best

tetrahydrobisdemethoxycurcumin

Antioxidant and anti-inflammatory plant extract. Read More »

Categories: Plant Extracts, Anti-Irritants, Antioxidants

Good

Terminalia sericea extract

Extract that has anti-inflammatory and antibacterial properties, but there is no research showing... Read More »

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

Best

Terminalia sericea

Herb that is effective against some forms of gram-positive and gram-negative bacteria when used in... Read More »

Categories: Plant Extracts, Anti-Irritants

Best

Terminalia catappa

Can be a potent antioxidant (Source: Anticancer Research, January-February 2001, pages 237–243). Read More »

Categories: Antioxidants, Plant Extracts

Good

tea tree oil

Also known as melaleuca, from the name of its plant source, Melaleuca alternifolia. It can have... Read More »

Categories: Plant Extracts, Antibacterial/Anti-Acne

Poor

Taraxacum officinale

See dandelion extract

Categories: Plant Extracts, Irritants

Poor

Taraktogenos kurzii

See chaulmoogra oil

Categories: Antibacterial/Anti-Acne, Plant Extracts

Average

tannin

Component of many plants. It can have an anti-tumor benefit when consumed in tea or foods (Source:... Read More »

Categories: Irritants, Plant Extracts

Poor

tangerine oil

Fragrant, volatile citrus oil that can be a skin irritant. Read More »

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

Average

Tanacetum parthenium

See feverfew extract

Categories: Plant Extracts, Irritants, Anti-Irritants

Good

tamanu oil

From a tree native to Polynesia. It is reputed to have wondrous wound-healing properties, as well... Read More »

Categories: Plant Extracts, Anti-Irritants

Poor

Szechuan peppercorn

From a plant native to Szechuan Province in China. It grows on trees, and so differs from black... Read More »

Categories: Plant Extracts, Irritants

Poor

Symphytum officinale extract

See comfrey extract

Categories: Plant Extracts, Irritants, Anti-Irritants

Good

sweet almond

Most often used in its oil form, this ingredient is expressed from almonds. Also used as an... Read More »

Categories: Emollients, Plant Extracts

Best

sunflower seed oil

Non-volatile plant oil used as an emollient in cosmetics. Read More »

Categories: Plant Extracts, Emollients

Average

sugarcane extract

Ingredients like sugarcane extract, fruit extracts, mixed fruit extracts, and milk solids may claim... Read More »

Categories: Plant Extracts

Average

strawberry begonia

There is no research showing this has any benefit for skin. Read More »

Categories: Plant Extracts

Average

stem cells

Stem cells are cells in animals and plants that are capable of becoming any other cell in that organism and reproducing more of those cells. Read More »

Categories: Miscellaneous, Plant Extracts

Best

stearyl glycyrrhetinate

The fatty acid form of the anti-irritant glycyrrhetinic acid, which is derived from licorice. Read More »

Categories: Plant Extracts, Anti-Irritants

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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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