Abstract: Provided is a pressure-sensitive adhesive (PSA) sheet including a PSA layer that exhibits improved water resistance. The PSA sheet provided by the present invention includes a PSA layer formed from a water-dispersed PSA composition containing an acrylic polymer as a base polymer, a water-dispersed tackifier resin, and at least any one type of Na ions and K ions. The total amount of Na ions and K ions in the PSA sheet is 0.3 part by weight or more to 0.8 part by weight or less per 100 parts by weight of the PSA sheet.

Abstract: Provided is a water-dispersed PSA composition capable of bringing about greater water resistance. The water-dispersed PSA composition provided by this invention comprises an acrylic polymer as base polymer, a water-dispersed tackifier resin, and a polyacrylic acid. The polyacrylic acid has a number average molecular weight of 2000 to 550×104. The polyacrylic acid content is 0.3 part by weight or higher and 7 parts by weight or lower to 100 parts by weight of the base polymer.

Abstract: Provided a composition excellent in biological safety and capable of enhancing GLP-1 secretion-accelerating effect due to a sweetening agent. The content ratio of the cyclic dipeptide or a salt thereof and a sweetening agent in a composition is controlled to fall within a specified range. Owing to this, GLP-1 secretion-accelerating effect due to the sweetening agent is enhanced.

Abstract: A pressure-sensitive adhesive sheet according to the present invention includes an irradiation-curable acrylic pressure-sensitive adhesive layer. The acrylic pressure-sensitive adhesive layer includes an acrylic polymer and a multifunctional acrylic oligomer. The acrylic pressure-sensitive adhesive layer, after curing, has a Young's modulus of 500 kPa to 10000 kPa at 23° C. The acrylic pressure-sensitive adhesive layer, after curing, has an adhesive strength of 3.0 N/20 mm or more. The acrylic pressure-sensitive adhesive layer before curing may have an adhesive strength of typically 3.0 N/20 mm or more. The acrylic pressure-sensitive adhesive layer before curing may have a Young's modulus of typically 30 kPa to 200 kPa at 23° C.

Abstract: Provided a composition excellent in biological safety and capable of enhancing GLP-1 secretion-accelerating effect due to a sweetening agent. The content ratio of the cyclic dipeptide or a salt thereof and a sweetening agent in a composition is controlled to fall within a specified range. Owing to this, GLP-1 secretion-accelerating effect due to the sweetening agent is enhanced.

Abstract: A pressure-sensitive adhesive sheet according to the present invention includes an irradiation-curable acrylic pressure-sensitive adhesive layer. The acrylic pressure-sensitive adhesive layer includes an acrylic polymer and a multifunctional acrylic oligomer. The acrylic pressure-sensitive adhesive layer, after curing, has a Young's modulus of 500 kPa to 10000 kPa at 23° C. The acrylic pressure-sensitive adhesive layer, after curing, has an adhesive strength of 3.0 N/20 mm or more. The acrylic pressure-sensitive adhesive layer before curing may have an adhesive strength of typically 3.0 N/20 mm or more. The acrylic pressure-sensitive adhesive layer before curing may have a Young's modulus of typically 30 kPa to 200 kPa at 23° C.

Abstract: Provided is a safe carbohydrate metabolism-ameliorating agent having an excellent carbohydrate metabolism-ameliorating action, and a safe GLP-1 secretion accelerator having an excellent GLP-1 secretion-accelerating action. The carbohydrate metabolism-ameliorating agent or GLP-1 secretion accelerator according to the present invention, which contains a specific cyclic dipeptide or a salt thereof as an active ingredient, is advantageous in that it has an excellent carbohydrate metabolism-ameliorating action, and that it is safe and can be ingested for a long period.