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Beauty and Cosmetic Glossary - Q
(TIP: LIP INK PRODUCTS ARE ALL NATURAL)
quaternium-15. Formaldehyde-releasing preservative used in cosmetics. It can be a skin sensitizer, as can all preservatives.
quercus. See oak root extract.
Quercus infectoria extract. See oak root extract.
quillaja extract. Extract of the Chilean soap bark tree. It contains a good amount of saponins, which have cleansing, antimicrobial, and water-binding properties for skin. See saponin.
quince seed. Used as a thickening agent in cosmetics, but it also has skin-constricting properties (Source: Natural Medicines Comprehensive Database, www.naturaldatabase.com) and may cause skin irritation.
quinoa oil. Derived from quinoa grain; it may have antifungal properties (Source: Journal of Agricultural Food Chemistry, May 2001, pages 2327–2332). It may also have emollient properties for skin, but there is little research showing this to be the case.
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