Tartaric Acid: A type of glycolic acid (fruit acid) derived from apples. Use to treat the skin to improve its texture and tone.

Tea Tree Oil: A natural preservative with antiseptic and germicidal properties used in soaps, shampoos, and skin-care products.

Thyme: Botanical properties are antiseptic, tonic, antibacterial and deodorizing. Often used in toothpaste, mouthwashes, perfumes and soap.

Titanium Dioxide: A non-chemical, common agent used in sunscreen products that works by physically blocking the sun. It may be used alone or in combination with other agents.

Tocopherol: Vitamin E, used as an antioxidant in cosmetics.

Toner: Product used after cleansing to help return skin to its natural pH. Removes any remaining trace of dirt or debris.

Tretinoin: A derivative of vitamin A.