Health experts believe chromium could cause skin diseases such as allergic dermatitis and eczema, which is very hard to cure.Neodymium can cause irritation of the eyes and mucosa.

• 健康专家认为钕和铬会引发过敏性皮炎和湿疹等不好对付的皮肤疾病，这些产品中含有的铬会刺激眼睛和粘膜。