Allergen Imidazolidinyl Urea Studies show that reactions to formaldehyde-releasing preservatives like imidazolidinyl urea are on the decline and it is currently ranked low in published lists of contact allergens. It
Allergen Dandruff Shampoo There are many ingredients in typical dandruff shampoos that could be causing your scalp issues … even the “dandruff” itself. Why? A dry, flaking, itching scalp can
Not An Allergen … but can cause allergic reactions Cacao, Cocoa It’s unlikely to see cacao (the raw, unprocessed version of cocoa), cocoa, or chocolate in a patch test tray and
Allergen A common misconception is that anything “alcohol” is bad for the skin but there are lots of alcohols (which is just a molecular categorization; many waxes and oils are
Not An Allergen … But Quite Bad for Skin Anxiety If anxiety could be put in a patch test, we bet it would make the top of published allergen lists
Not An Allergen Wild Yam Perhaps because Dioscorea villosa is still relatively new in skincare, it is not a top contact allergen (the more common an ingredient is, the higher
Not An Allergen Estrogen This sex hormone is produced by our bodies and plays an important role in human reproductive systems. It can also be taken orally, via transdermal patch,
Allergen Braces, Retainers Nickel in the metals is normally the top culprit (it has also consistently ranked number one in published lists of top contact allergens for decades and was
Allergen Sesquiterpene lactone (STL), Terpenes “Terpenes” is the broader term for the compounds responsible for the odor of most plants (they’re the primary constituents of essential oils, so many of
