Allergen Sodium Benzoate This is another popular preservative and, like so many, it is on published lists as a top contact allergen. Sodium benzoate isn’t
Not An Allergen Witch Hazel Anything can become a contact allergen, especially the more commonplace it is. This makes it even more impressive that witch
Not An Allergen Propanediol Propanediol is a corn-derived preservative that is currently not published as a top contact allergen (neither is corn). But propylene glycol
Allergen Benzisothiazolinone (BIT) This antimicrobial preservative is, like many other isothiazolinones such as MCI/MI (methylchloroisothiozolinone / methylisothiozolinone), published as a common contact allergen. Actually both
