{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T20:03:36Z","timestamp":1789675416723,"version":"4.0.1"},"reference-count":43,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2021,7,17]],"date-time":"2021-07-17T00:00:00Z","timestamp":1626480000000},"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>Background Vitamin D deficiency occurs in as much as 90\u201395% of the Polish population, although this condition is known to cause negative long-term health implications. The role of medical doctors in advising proper supplementation, monitoring and correcting the levels of 25-hydroxyvitamin D in individuals is of great importance and should be used to help mitigate its common deficits. The aim of this study was to evaluate knowledge, attitudes and practices of Polish physicians regarding vitamin D supplementation in order to identify areas for improvement and determinants for the knowledge gaps. Methods The study group comprised 701 medical doctors aged 32.1 \u00b1 5.3 years on average, mostly women (71.61%). An original survey questionnaire was developed for the purpose of the study. Results The mean vitamin D knowledge score was 6.8 \u00b1 2.3 (in a scale 0\u201313) and was related to gender (p &lt; 0.001), type of specialization (p = 0.032), D3 supplements use (p &lt; 0.001), recommending supplementation to patients (p = 0.005), to relatives and friends (p &lt; 0.001) and to healthy adults (p &lt; 0.001). In terms of self-administration, 14% of respondents take vitamin D all-year-round while 24% only in autumn and winter. 25% of respondents monitor their vitamin D (25-hydroxyvitamin D) serum concentration. Most participants (61%) did not recommend supplementing vitamin D to their patients on a regular basis. Conclusions The study indicates that medical doctors in Poland need to have more training and education on vitamin D supplementation in order to better address the problem of its deficits in the population.<\/jats:p>","DOI":"10.3390\/nu13072443","type":"journal-article","created":{"date-parts":[[2021,7,18]],"date-time":"2021-07-18T21:18:52Z","timestamp":1626643132000},"page":"2443","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Vitamin D Knowledge, Attitudes and Practices of Polish Medical Doctors"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0054-4860","authenticated-orcid":false,"given":"Wojciech Stefan","family":"Zgliczy\u0144ski","sequence":"first","affiliation":[{"name":"Center of Postgraduate Medical Education, Department of Lifestyle Medicine, School of Public Health, 01-826 Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1652-6616","authenticated-orcid":false,"given":"Olga Maria","family":"Rostkowska","sequence":"additional","affiliation":[{"name":"Department of Transplantation Medicine, Nephrology and Internal Diseases, Medical University of Warsaw, 02-006 Warsaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0002-8591","authenticated-orcid":false,"given":"Beata","family":"Sarecka-Hujar","sequence":"additional","affiliation":[{"name":"Department of Basic Biomedical Science, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, 41-200 Sosnowiec, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,7,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"365","DOI":"10.1152\/physrev.00014.2015","article-title":"Vitamin D: Metabolism, Molecular Mechanism of Action, and Pleiotropic Effects","volume":"96","author":"Christakos","year":"2016","journal-title":"Physiol. 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