{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T23:13:56Z","timestamp":1792451636656,"version":"4.5.0"},"reference-count":145,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T00:00:00Z","timestamp":1774310400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Medical Sciences"],"abstract":"<jats:p>Background: Obesity is commonly seen as a condition of overnutrition; however, it is paradoxically associated with micronutrient deficiencies. These deficiencies are clinically relevant and may contribute to the progression of obesity-related comorbidities through interconnected pathways, including chronic low-grade inflammation, oxidative stress, gut dysbiosis, and impaired nutrient absorption. Objectives: This narrative review aims to summarize current evidence regarding the prevalence, underlying mechanisms, and clinical consequences of micronutrient deficiencies in individuals with obesity, with particular emphasis on their metabolic implications and potential therapeutic strategies. Results: Among individuals with obesity, iron, zinc, magnesium, calcium, vitamin D, vitamin B12, and folate are the most frequently reported deficiencies. These deficiencies arise from multiple mechanisms, including poor diet quality, increased metabolic demands, and compromised gastrointestinal absorption. In addition, obesity-related alterations in pharmacokinetics may further interfere with micronutrient distribution and bioavailability. Together, these mechanisms may lead to various clinical outcomes, such as anemia, immune, metabolic, and cardiovascular dysfunctions, along with cognitive impairment. Although several studies suggest that correcting these deficiencies may improve clinical outcomes, findings remain inconsistent, highlighting the complex and multifactorial pathophysiology underlying micronutrient imbalance in obesity. Conclusions: Micronutrient deficiencies represent frequently overlooked contributors to metabolic dysregulation in obesity. Their identification and correction should be considered a central part of the obesity management strategy. A personalized supplementation approach, based on clinical, biological, and pathophysiological characteristics, may provide a complementary support for weight-management treatments.<\/jats:p>","DOI":"10.3390\/medsci14020160","type":"journal-article","created":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T12:58:59Z","timestamp":1774357139000},"page":"160","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["The Nutritional Paradox of Obesity: Mechanisms and Clinical Implications of Micronutrient Deficiencies"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-5272-8649","authenticated-orcid":false,"given":"Raluca-Elena","family":"Alexa","sequence":"first","affiliation":[{"name":"Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania"},{"name":"2nd Internal Medicine Clinic, St. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4674-5580","authenticated-orcid":false,"given":"Raluca Ecaterina","family":"Haliga","sequence":"additional","affiliation":[{"name":"Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania"},{"name":"2nd Internal Medicine Clinic, St. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bianca Codrina","family":"Mor\u0103ra\u0219u","sequence":"additional","affiliation":[{"name":"Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania"},{"name":"2nd Internal Medicine Clinic, St. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0043-9051","authenticated-orcid":false,"given":"Alexandr","family":"Ceasovschih","sequence":"additional","affiliation":[{"name":"Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania"},{"name":"2nd Internal Medicine Clinic, St. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3994-2356","authenticated-orcid":false,"given":"Oana","family":"S\u00eerbu","sequence":"additional","affiliation":[{"name":"Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania"},{"name":"2nd Internal Medicine Clinic, St. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5567-8746","authenticated-orcid":false,"given":"Andreea","family":"Asaftei","sequence":"additional","affiliation":[{"name":"Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania"},{"name":"2nd Internal Medicine Clinic, St. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1721-2360","authenticated-orcid":false,"given":"Victori\u021ba","family":"\u0218orodoc","sequence":"additional","affiliation":[{"name":"Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania"},{"name":"2nd Internal Medicine Clinic, St. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lauren\u021biu","family":"\u0218orodoc","sequence":"additional","affiliation":[{"name":"Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania"},{"name":"2nd Internal Medicine Clinic, St. Spiridon Clinical Emergency Hospital, 700111 Iasi, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1159\/000519503","article-title":"Malnutrition in Obesity: Is It Possible?","volume":"15","author":"Antosik","year":"2022","journal-title":"Obes. 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