Abstract: An object of the present invention is to provide a sleep quality improving agent which has a sufficient sleep quality improving effect, can exert makes the effect even through oral administration in any dosage form, and has ensured safety to the body. That is, the present invention provides: a sleep quality improving agent which contains a stilbene-based compound and/or an olive extract as an active ingredient, and a sleep quality improving composition which contains the sleep quality improving agent.

Abstract: An object is to provide a sleep quality improving agent that can sufficiently exert the effect of improving the quality of sleep and ensures safety for the body. A sleep quality improving agent containing, as an effective ingredient, a plant of the Fraxinus genus such as Fraxinus excelsior L., an extract thereof, Larix sibirica extract, dihydroquercetin, dihydrokaempferol, or naringenin, and a sleep quality improving composition containing the sleep quality improving agent are provided.

Abstract: It is an object of the present invention to provide a growth hormone secretagogue that is excellent in effect of promoting secretion of a growth hormone and is orally available. The growth hormone secretagogue of the present invention contains one or more selected from the group consisting of S-adenosylmethionine and/or a salt thereof, a Siberian larch extract, an olive extract, and a stilbene-based compound as an active ingredient. S-adenosylmethionine and/or the salt thereof may be a form itself of chemically synthesized S-adenosylmethionine and/or the salt thereof, or may be a microbial cell or a culture containing S-adenosylmethionine and/or the salt thereof. The stilbene-based compound may be an extract extracted from a Vitaceae plant or a Gnetaceae plant. The olive extract may be an extract separated from a fruit of olive.

Abstract: An object is to provide a sleep quality improving agent that has a sufficient effect of improving the quality of sleep, can exert the effect regardless of the form of administration, even by oral administration, and ensures safety for the body. A sleep quality improving agent containing an S-adenosylmethionine-containing yeast as an effective ingredient and a sleep quality improving composition containing the sleep quality improving agent are provided.