Pitfalls of patch testing with glucosides.

Glucosides are non-ionic surfactants formed by the condensation of fatty acids with glucose (1). They have cleansing and emulsifying properties, and are used in shampoos and soaps, as well as in leave-on products such as lotions, and sunscreen agents. They are completely biodegradable, making them ecofriendly. Although contact allergies to glucosides have been reported, they are uncommon (2–6). Many patients reported in the literature reacted to more than one glucoside, suggesting cross-reactivity between glucosides (3).