Metallic<unk>  Because<unk>  reacts exothermically with water and acids,<unk>  metal coming into contact with bodily moisture results in severe corrosive irritation. When swallowed,<unk>  metal has the same effect on the mouth, oesophagus, and stomach, and<unk> n be fatal. However, long-term exposure is not known to have distinct adverse effects.
Calcium
Potassium
Phosphate
Chorus
Phosphine
High-energy phosphate
Magnesium 
Magnesium