Acomposition 100 of the present invention includes silicon fine particles or aggregates thereof having hydrogen generating ability.Since the silicon fine particles or the aggregates have hydrogen generating ability, hydrogen can be generated in the body, for example, by ingesting the composition for animals.In addition, for plants, hydrogen can be supplied to the plants, for example, by placing or putting the composition in water (water-containing liquid) or fertilizer etc.to be given to the plant.本發明之一種調配物100，包括具有氫生成能之矽微粒或其凝聚體。由於該矽微粒或該凝聚體具有氫生成能，例如，對於動物，藉由攝取該調配物，可以在體內生成氫。此外，對於植物，例如，藉由在給與之水分（含水液體）或肥料等中放置或投入該調配物，由該調配物生成之氫可以供給該植物。
