A metallic taste in the mouth can be a result of hypoglycaemia or low blood sugar. This can be caused by the body’s over-production of adrenalin in response to the low sugar levels. Low blood sugar may result in a variety of symptoms, including clumsiness, difficulty talking, confusion, loss of consciousness, seizures and even death. A feeling of hunger, sweating, shakiness, and weakness may also be present. Symptoms typically come on quickly. The metallic taste in the mouth can actually serve as a warning to diabetics and help to prevent a collapse when their sugar levels dip to dangerous levels.