| 摘要 |
An antioxidant comprising as an active ingredient, a 12CaO·7Al<SUB>2</SUB>O<SUB>3</SUB> compound and/or a 12SrO·7Al<SUB>2</SUB>O<SUB>3</SUB> compound and a mixed crystal thereof, each of which contains a negative hydrogen ion (H<SUP>-</SUP>) at a concentration of 1 x 10<SUP>18</SUP> cm<SUP>-3</SUP> or more. |
