Nickel is a metal that could be present in trace amounts in cosmetic products, conveyed for example by water, raw materials or the industrial process.
Although it is generally present in very low quantities, it could cause allergic reactions in particularly sensitive people. The allergic reaction is mainly manifested by contact dermatitis (itching, redness, eczema, etc.).
For individuals who are particularly sensitive to nickel, it is essential to carry out a sensitivity test on a small area of the forearm, to prevent an allergic reaction.
If you experience a reaction (redness, itching, etc.), it is recommended not to use the product.