All our GF is considered hypoallergenic. We guarantee that there is no nickel, cadmium or carcinogenic in any of our jewelry pieces. However, there are so many types of metal sensitivities. There are people who are simply allergic to GF or Sterling Silver. Often these people can only wear high carat gold (smaller percentage of base metals in the mix). If you are very sensitive to copper, you may have a problem with sterling silver. If you are very sensitive to brass, you may have a strong reaction to gold filed (the core is brass).