Nickel is a silvery-white metal. Stainless steel as an alloy contains a low percentage of nickel.
In the field of jewelry and watches is to be noted that the skin of an estimated one fifth of all people reactes allergic to nickel. Therefore, the production of white gold has to be performed without a nickel since the 1990 years.
If you want to be completely sure with regard to nickel sensitivity, you should prefer watch cases and bracelets made from the skin-friendly materials titanium, ceramic, gold, palladium platinum or tantalum.
Food with a high nickel content are Strawberries, peas, bran and untreated rice, but also food from cans.