What metals in jewelry are people usually allergic to?

Metal allergy: The most common metals associated with contact dermatitis allergy are nickel, cobalt, gold sodium thiosulphate. The T.R.U.E. Test can help clarify if these metals are implicated with the contact allergy associated with rash. Here is a link for more information on the T.R.U.E. Test: http://www.smartpractice.com/Apps/WebObjects/SmartPractice.woa/wa/content?f=product-truetest.html&m=SPA