{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T16:46:30Z","timestamp":1790354790435,"version":"4.1.0"},"reference-count":150,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2025,5,6]],"date-time":"2025-05-06T00:00:00Z","timestamp":1746489600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background: Inadequate dietary intake of vitamin D, vitamin K, and calcium, as well as sub-optimal sunlight exposure, can lead to bone loss in the general population, and more so in patients with ulcerative colitis, who are burdened by additional predisposing factors for osteoporosis, such as chronic inflammation and cortisone use. However, micronutrient deficiencies, if present, are easily corrected by nutritional intervention. While the relation between calcium and vitamin D and bone metabolism is well known, fewer data are available for vitamin K, for both healthy individuals and patients. The aim of this review is to provide an overview of recent reports focusing on nutritional deficits relevant to the development of osteoporosis\/osteopenia in patients affected by ulcerative colitis. Methods: A systematic electronic search of the English literature up to January 2025 was performed using Medline and the Cochrane Library. Results: Despite being central in bone mineralization, data on dietary calcium intake in ulcerative colitis are relatively scarce, deriving mostly from mixed inflammatory bowel disease cohorts. Although lower than controls, dietary calcium intake approaches the recommended daily allowance, which establishes the necessary daily intake of nutrients. Conversely, vitamin D and vitamin K deficiencies are highly prevalent in ulcerative colitis patients. The widely shared opinion that milk and lactose-containing foods, as well as vegetables, worsen diarrhea is a prime determinant of inadequate vitamin D and vitamin K intake. Conclusions: Increased awareness of the importance of nutrition and the common occurrence of nutritional deficits represents the first step for the development of dietary intervention strategies to counteract the increased risk of osteoporosis in ulcerative colitis patients.<\/jats:p>","DOI":"10.3390\/jcm14093202","type":"journal-article","created":{"date-parts":[[2025,5,6]],"date-time":"2025-05-06T04:28:22Z","timestamp":1746505702000},"page":"3202","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Nutritional Deficiencies and Reduced Bone Mineralization in Ulcerative Colitis"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1350-4876","authenticated-orcid":false,"given":"Filippo","family":"Vernia","sequence":"first","affiliation":[{"name":"Department of Life, Health, and Environmental Sciences, Division of Gastroenterology, Hepatology, and Nutrition, University of L\u2019Aquila, Piazza S. Tommasi, 1-Coppito, 67100 L\u2019Aquila, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4885-166X","authenticated-orcid":false,"given":"Emanuela","family":"Ribichini","sequence":"additional","affiliation":[{"name":"Department of Translational and Precision Medicine, Sapienza University, 00185 Rome, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giorgia","family":"Burrelli Scotti","sequence":"additional","affiliation":[{"name":"Department of Translational and Precision Medicine, Sapienza University, 00185 Rome, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6341-5711","authenticated-orcid":false,"given":"Giovanni","family":"Latella","sequence":"additional","affiliation":[{"name":"Department of Life, Health, and Environmental Sciences, Division of Gastroenterology, Hepatology, and Nutrition, University of L\u2019Aquila, Piazza S. Tommasi, 1-Coppito, 67100 L\u2019Aquila, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2389","DOI":"10.1007\/s00198-018-4586-6","article-title":"Risk of fracture and low bone mineral density in adults with inflammatory bowel diseases. A systematic literature review with meta-analysis","volume":"29","author":"Szafors","year":"2018","journal-title":"Osteoporos. 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