There are a variety of materials used for additive manufacturing, these include biochemicals, ceramics, metals and thermoplastics. Biochemicals used in AM include silicon, calcium phosphate and zinc while bio-inks fabricated from stem cells are also being explored. These materials are generally used for healthcare applications. A range of ceramics are used in AM, including alumina, tricalcium phosphate and zirconia as well as powdered glass which can be baked together with adhesives to create new types of glass product. A wide variety of metals and metal alloys are used for additive manufacturing, including gold and silver, stainless steels and titanium amongst others.