Solid preparation, method for producing solid preparation, and method for generating hydrogen

Abstract

One solid preparation of the present invention mainly includes silicon fine particles, and has a capability of generating hydrogen. In addition, one specific example of the solid preparation mainly includes silicon fine particles having a crystallite diameter principally of 1 nm or more and 100 nm or less, and exhibits a capability of generating hydrogen in an amount of 3 ml/g or more when brought into contact with a water-containing liquid having a pH value of 7 or more. In this solid preparation, hydrogen is generated when the silicon fine particles are brought into contact with a water-containing liquid having a pH value of 7 or more. Therefore, taking advantage of the characteristics of the solid preparation, generation of hydrogen is promoted in, for example, a gastrointestinal tract where the pH value is 7 or more due to secretion of pancreatic fluid after passage through the stomach after oral ingestion.

What is claimed is: 
     
         1 . An oral preparation comprising silicon fine particles or an aggregate of the silicon fine particles, and has a capability of generating hydrogen. 
     
     
         2 . The oral preparation according to  claim 1 , wherein
 the silicon fine particles or the aggregate has an antioxidative effect in the human body, and wherein the silicon fine particles or the aggregate has the capability of generating hydrogen when the silicon fine particles or the aggregate contacts a gastrointestinal tract internal fluid in a small intestine or subsequent tract.   
     
     
         3 . The oral preparation according to  claim 1 , further comprising an organic acid. 
     
     
         4 . The oral preparation according to  claim 1 , wherein the oral preparation is a capsule preparation in which the silicon fine particles or the aggregate is encapsulated, or a tablet formed so that the silicon fine particles or the aggregate is in a lump form.