PROBLEM TO BE SOLVED: To provide a production method for reduced minerals containing minerals which have been pointed out as causing various disorders in living organisms if there is a lack thereof, and which has high reduction power against active oxygen which is a harmful substance for the body while having stable activity therefor.SOLUTION: Incinerated ash is added into a gas furnace filled with nitrogen gas, thereafter the gas furnace is deaerated, hydrogen gas is added into the gas furnace in a range of 1 to 1000 mM per 1 g of the incinerated ash, the gas furnace is heated such that the temperature inside the furnace is in the range of 600 to 1000°C and a reduced mineral is produced, thereafter, the temperature inside the furnace is reduced to normal temperature, the furnace is exhausted and substituted with nitrogen gas, and the reduced mineral is recovered.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】不足すると生体にさまざまな障害がおこることが指摘されているミネラルを豊富に含有し、さらに、身体に有害な物質である活性酸素に対して高い還元力を有すると共に、その活性が安定な還元型ミネラルの製造方法を提供する。【解決手段】窒素ガスで充填したガス炉内に焼却灰を入れ、その後、前記ガス炉を脱気し、前記ガス炉内に前記焼却灰1gに対して水素ガスを1~1000mMの範囲で充填し、炉内温度が600~1000℃の範囲になるように前記ガス炉を加熱し還元型ミネラルを作成した後、前記炉内温度を常温に下げて排気及び窒素置換を行って、還元型ミネラルを回収する。【選択図】図1