Oral preparation, feed, supplements, food additives, health food

摘要

The present invention provides a hydrogen generation method that realizes so-called selective hydrogen generation in a specific range of pH value. A method for generating hydrogen according to the present invention comprises an oral solid preparation having hydrogen generation ability and containing silicon fine particles having a crystallite diameter of 1 nm or more and 100 nm or less or aggregates of the silicon fine particles, and having a pH of A second water-containing liquid having a pH value of 7 or more after the first contact step of bringing into contact with the first water-containing liquid having a pH of less than 7 and the silicon fine particles or the aggregates of the silicon fine particles after the first contact step; And b. [Selected figure] Figure 1