“…11 Nickel is diffusely present in the ground, water, and air and it is frequently used for industrial purposes. 12 Nickel is also present at high concentration in foods including tomatoes, cocoa, peanuts, oats, beans, whole wheat, lentils, hazelnuts, walnuts, peas, and soy. 13 Nickel is the primary cause of atopic contact dermatitis (ACD), and it has also been reported to be responsible for a systemic condition named ''systemic nickel allergy syndrome'' (SNAS), which is characterized by gastrointestinal, respiratory, and neurologic manifestations.…”