{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T19:53:25Z","timestamp":1790970805170,"version":"4.1.0"},"reference-count":68,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2024,4,19]],"date-time":"2024-04-19T00:00:00Z","timestamp":1713484800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Taiyo Kagaku Co., Ltd."}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>The consumption of functional foods in a daily diet is a promising approach for the maintenance of cognitive health. The present study examines the effects of water-soluble prebiotic dietary-fiber, partially hydrolyzed guar gum (PHGG), on cognitive function and mental health in healthy elderly individuals. Participants consumed either 5 g\/day of PHGG or a placebo daily for 12 weeks in this randomized, double-blind, placebo-controlled, and parallel-group study. An assessment of cognitive functions, sleep quality, and subjective mood evaluations was performed at baseline and after 8 and 12 weeks of either PHGG or placebo intake. The visual memory scores in cognitive function tests and sleepiness on rising scores related to sleep quality were significantly improved in the PHGG group compared to the placebo group. No significant differences were observed in mood parameters between the groups. Vigor\u2013activity scores were significantly improved, while the scores for Confusion\u2013Bewilderment decreased significantly in the PHGG group when compared to the baseline. In summary, supplementation with PHGG was effective in improving cognitive functions, particularly visual memory, as well as enhancing sleep quality and vitality in healthy elderly individuals (UMIN000049070).<\/jats:p>","DOI":"10.3390\/nu16081211","type":"journal-article","created":{"date-parts":[[2024,4,19]],"date-time":"2024-04-19T04:10:15Z","timestamp":1713499815000},"page":"1211","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Effectiveness of Partially Hydrolyzed Guar Gum on Cognitive Function and Sleep Efficiency in Healthy Elderly Subjects in a Randomized, Double-Blind, Placebo-Controlled, and Parallel-Group Study"],"prefix":"10.3390","volume":"16","author":[{"given":"Aya","family":"Abe","sequence":"first","affiliation":[{"name":"Department of Research and Development, Nutrition Division, Taiyo Kagaku Co., Ltd., 1-3 Takaramachi, Yokkaichi, Mie 510-0844, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mahendra Parkash","family":"Kapoor","sequence":"additional","affiliation":[{"name":"Department of Research and Development, Nutrition Division, Taiyo Kagaku Co., Ltd., 1-3 Takaramachi, Yokkaichi, Mie 510-0844, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"So","family":"Morishima","sequence":"additional","affiliation":[{"name":"Department of Research and Development, Nutrition Division, Taiyo Kagaku Co., Ltd., 1-3 Takaramachi, Yokkaichi, Mie 510-0844, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Makoto","family":"Ozeki","sequence":"additional","affiliation":[{"name":"Department of Research and Development, Nutrition Division, Taiyo Kagaku Co., Ltd., 1-3 Takaramachi, Yokkaichi, Mie 510-0844, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norio","family":"Sato","sequence":"additional","affiliation":[{"name":"Department of Research and Development, Nutrition Division, Taiyo Kagaku Co., Ltd., 1-3 Takaramachi, Yokkaichi, Mie 510-0844, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsuyoshi","family":"Takara","sequence":"additional","affiliation":[{"name":"Medical Corporation Seishinkai, Takara Clinic, 9F Taisei Bldg., 2-3-2, Higashi-gotanda, Shinagawa, Tokyo 141-0022, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5443-788X","authenticated-orcid":false,"given":"Yuji","family":"Naito","sequence":"additional","affiliation":[{"name":"Department of Human Immunology and Nutrition Science, Kyoto Prefectural University of Medicine, Kamigyoku, Kyoto 602-8566, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,19]]},"reference":[{"key":"ref_1","unstructured":"Statistics Bureau of Japan (2023, March 01). 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