{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T19:04:13Z","timestamp":1789585453264,"version":"build-2803163510"},"reference-count":109,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T00:00:00Z","timestamp":1770336000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Metabolic diseases such as type 2 diabetes and obesity are increasingly recognized as disorders of dysregulated cellular communication rather than solely enzymatic or transcriptional dysfunction. While conventional therapies primarily target metabolic enzymes and nuclear receptors, growing evidence highlights ion channels and G protein-coupled receptors (GPCRs) at the cell membrane as critical upstream regulators of glucose homeostasis, energy expenditure, and inflammation. Cinnamon (Cinnamomum spp.), a widely consumed nutraceutical, has demonstrated consistent antidiabetic and antiobesity effects; however, its actions at the membrane signaling interface remain underappreciated. This review synthesizes emerging evidence that cinnamon-derived phytonutrients, particularly cinnamaldehyde, eugenol, and polyphenolic compounds, modulate key ion channels and GPCR pathways involved in metabolic regulation. We discuss how cinnamon influences calcium signaling, transient receptor potential (TRP) channels, and metabolite- and hormone-sensing GPCRs, thereby affecting insulin secretion, incretin release, appetite control, thermogenesis, and inflammatory tone. A central highlight of this review is the crosstalk between ion channels and GPCRs in metabolic tissues, illustrating a systems-level mechanism through which cinnamon exerts pleiotropic metabolic benefits. Translational implications are explored, including the potential of cinnamon to complement existing antidiabetic therapies and its relevance within precision nutrition frameworks. By focusing on the cell membrane as an integrative signaling hub, this review reframes cinnamon as a membrane-active nutraceutical capable of restoring metabolic balance through coordinated modulation of ion channel GPCR networks.<\/jats:p>","DOI":"10.3390\/nu18030547","type":"journal-article","created":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T16:32:59Z","timestamp":1770395579000},"page":"547","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Cinnamon-Derived Phytonutrients as Modulators of Ion Channels and G Protein-Coupled Receptor Signaling in Metabolic Diseases"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0461-9874","authenticated-orcid":false,"given":"Raymond Rubianto","family":"Tjandrawinata","sequence":"first","affiliation":[{"name":"School of Bioscience, Innovation and Technology, Atma Jaya Catholic University of Indonesia, Jakarta 12930, Indonesia"},{"name":"Dexa Laboratories of Biomolecular Sciences, Dexa Medica, Industri Selatan V PP-7, Jababeka 2, Cikarang 17550, Indonesia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-0381-1480","authenticated-orcid":false,"given":"Bayu Perkasa","family":"Rosari","sequence":"additional","affiliation":[{"name":"Department of Anatomical Pathology, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Jakarta 14440, Indonesia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2016-0151","authenticated-orcid":false,"given":"Rony Abdi","family":"Syahputra","sequence":"additional","affiliation":[{"name":"Department of Pharmacology, Faculty of Pharmacy, Universitas Sumatera Utara, Medan 20155, Indonesia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Reggie","family":"Surya","sequence":"additional","affiliation":[{"name":"Department of Food Technology, Faculty of Engineering, Bina Nusantara University, Jakarta 11480, Indonesia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2151-0854","authenticated-orcid":false,"given":"Fahrul","family":"Nurkolis","sequence":"additional","affiliation":[{"name":"Master of Basic Medical Science, Faculty of Medicine, Universitas Airlangga, Surabaya 60131, Indonesia"},{"name":"Medical Research Center of Indonesia, Surabaya 60281, Indonesia"},{"name":"Institute for Research and Community Service, State Islamic University of Sunan Kalijaga (UIN Sunan Kalijaga), Yogyakarta 55281, Indonesia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,2,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Cho, Y.Y., Kim, S., Kim, P., Jo, M.J., Park, S.-E., Choi, Y., Jung, S.M., and Kang, H.J. 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