Allergen. Not just an allergen, this popular topical antibiotic was the American Contact Dermatitis Society‘s “allergen of the year” in 2010. Watch for it in its pure form but also

Allergen. Many metals are common allergens, and gold is no exception. To be sure, ask your dermatologist for a patch test — you might be sensitive to many other allergens but not this gorgeous one! References: 

Allergen. Lanolin, a fatty substance from sheep’s wool, is actually an alcohol….but that’s not why it is an allergen (“alcohol” per se isn’t an allergen…click here to learn more). Far from being drying,

 Allergen. This ingredient has some wonderful properties, but it is on the published lists of most common allergens. Still, that doesn’t mean you’re allergic to it. To be sure, ask

Allergen Nickel Not just an allergen or a top allergen, nickel is frequently the number one common allergen on published allergen lists, and was the 2008 Allergen of the Year of the American

 Allergen. Rubber is one of the top allergens and can also cause problems in rubberized plastics. Rubber can cause rashes, peeling, itching but also hyper- and hypopigmentations. If you think

 Allergen. They are common allergens themselves and, like limonene and linalool, a source of allergens (both limonene and linalool can be extracted from citruses). If you’ve patch tested positive to

 Not An Allergen. Excellent sunscreens, neither zinc oxide nor titanium dioxide are on published allergen lists. Also called “mineral,” “physical” or “inorganic” sunscreen actives, both are also frequently recommended as safer