Plant Extracts , Antibacterial/Anti-Acne , Irritants

Both the oil and the extract can have antimicrobial properties (Source: Journal of Agricultural and Food Chemistry, July 2002, pages 3943–3946), but they can also have an irritating, sensitizing effect on skin. Peppermint oil is a more potent irritant than, say, peppermint water. Peppermint is a common cause of allergic contact dermatitis on the face, particularly around the mouth, as peppermint is used as a flavoring in countless toothpastes (Sources: International Journal of Risk and Safety in Medicine, January 2012, pages 147-161; Dermatitis , November-December 2010, pages 327-329; and

See counter-irritant

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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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