Abstract: The present invention aims to provide a novel method that can quantify diaminopimelic acid-containing bacteria in a test sample. The present invention relates to a method of quantifying diaminopimelic acid-containing bacteria in a test sample, including a step of quantifying the diaminopimelic acid-containing bacteria, using, as an index, the amount of diaminopimelic acid derived from the diaminopimelic acid-containing bacteria in the test sample.

Abstract: The present invention aims to provide a novel method that can quantify diaminopimelic acid-containing bacteria in a test sample. The present invention relates to a method of quantifying diaminopimelic acid-containing bacteria in a test sample, including a step of quantifying the diaminopimelic acid-containing bacteria, using, as an index, the amount of diaminopimelic acid derived from the diaminopimelic acid-containing bacteria in the test sample.

Abstract: The present invention aims to provide a technique that can suppress foaming of liquid oral compositions containing collagen peptides. The present invention relates to a liquid oral composition containing collagen peptides containing Pro-Hyp, wherein an amount of Pro-Hyp is 1.0 to 180 mg/100 mL, and the like.

Abstract: An object of the present invention is to provide a composition for improving intestinal barrier function capable of improving intestinal barrier function. The present invention relates to a composition for improving intestinal barrier function, containing a flavan-3-ol polymer having a weight-average molecular weight of 4500 to 50000 as an active ingredient.

Abstract: The present invention relates to a composition for inhibiting reactive oxygen species production, containing triterpenic acid having an acetyl group and/or a salt thereof as an active ingredient.

Abstract: The present invention relates to a composition for improving intestinal barrier function, the composition containing a compound having a gallic acid residue as an active ingredient, wherein the compound having a gallic acid residue is at least one compound selected from the group consisting of the following (A1) to (A3): (A1) a flavan-3-ol polymer having a galloyl group; (A2) a hydrolyzable tannin; and (A3) at least one compound selected from the group consisting of catechin gallate, epicatechin gallate, and gallocatechin gallate.

Abstract: An object of the present invention is to provide: a composition for improving intestinal barrier function capable of improving intestinal barrier function; and an agent for enhancing the intestinal barrier function improvement action of gallic acid. The present invention relates to a composition for improving intestinal barrier function, containing: gallic acid as an active ingredient.

Abstract: There are provided black ginger extracts that contain reasonable amounts of methoxyflavones and which are reduced in undesirable flavors such as bitterness or in the intensity of a black purple color. To this end, oil or fat extracts are obtained from black ginger.

Abstract: Provided is a clock gene expression level regulator which has a long history of being eaten and is high in safety, easily obtainable and superior in processability. Specifically provided is a clock gene expression level regulator comprising, as an active component, at least one compound selected from the group consisting of oleuropein, 3,4-DHPEA-EA, derivatives thereof, and salts of the foregoing. The clock gene expression level regulator of the present invention can regulate the expression levels of the Per1 and Bmal1 genes in antiphase to each other, thereby entraining the expression rhythms of the Per and Bmal genes to their normal phases.

Abstract: The purpose of the present invention is to provide a means for promoting the in vivo absorption of hydroxytyrosol or a derivative thereof, prolonging the in vivo residence time, and sustaining the effect. As a result of in-depth studies, the present inventors discovered that the in vivo absorption of hydroxytyrosol or a derivative thereof can be promoted and the in vivo residence time can be prolonged by using hydroxytyrosol or a derivative thereof in combination with a compound having a galloyl group.

Abstract: Provided is a method for quantitative analysis of carotenoids such as ?-cryptoxanthin contained in a sample such as citrus fruit or the like which enables simple and accurate quantitative analysis. An internal standard such as lycopene or retinal is used, whereby work is facilitated and an error of a measured value is reduced. Further, a dehydrating agent is added during saponification reaction in the preparation of a sample for analysis, whereby a deviation of a measured value can be reduced.

Abstract: Provided is a method for quantitative analysis of carotenoids such as ?-cryptoxanthin contained in a sample such as citrus fruit or the like which enables simple and accurate quantitative analysis. An internal standard such as lycopene or retinal is used, whereby work is facilitated and an error of a measured value is reduced. Further, a dehydrating agent is added during saponification reaction in the preparation of a sample for analysis, whereby a deviation of a measured value can be reduced.