A method of manufacturing digestible powder that generates a hydride ion (H−) when dissolved in water is provided. A vacuum oven system that can reach 600° C. and 10−5 torr is used within this method. The method according to this current application comprises of ten to eleven steps of vacuuming, heating and hydrogen treatment of coral reef powder. By adding mixtures of magnesium, phosphorus and potassium, the maximum treating temperature and vacuum pressure is lowered. The coral reef powders treated via the ten steps emit hydrogen when dissolved in the water like powders that are treated with a mixture of natural form of magnesium, phosphorus and potassium complex. Those natural form of the magnesium, phosphorous and potassium includes (NH4)MgPO4.6H2O (struvite), MgSO4.KCl.H2O (Kainite), K2SO4.MgSO4.6H2O (Schönite), K2SO4.MgSO4.4H2O (Leonite), and K2SO4.2MgSO4 (Langbeinite).
