Vitamin D has attracted much scientific interest in recent years, mostly due to its newly described roles in metabolism regulation and cell proliferation. Along with hypovitaminosis D, the incidence of obesity has risen and has become a public health concern. The association between these two conditions is not merely coincidence and is being deeply investigated regarding its prevalence, mechanism, and even a possible causal relation. The data are still inconclusive but there is important evidence indicating that vitamin D is involved with fat accumulation, the responsible mechanism however still the principal question. The three main hypotheses are: adipose tissue sequestration, genetic modulation, such as polymorphism of the vitamin D receptor (VDR), or an organism evolutionary adaptation to cold weather. In conclusion, more evidence is needed to determine what the correct direction of this connection is and the possible therapeutic strategies of vitamin D replenishment and obesity control.
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http://dx.doi.org/10.17925/EE.2013.09.02.128 | DOI Listing |
Minerva Obstet Gynecol
January 2025
Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy.
Introduction: Polycystic ovary syndrome (PCOS) is a heterogeneous endocrine-metabolic syndrome mainly characterized by ovarian dysfunction, which is only one manifestation of a more complex syndrome with a significant systemic impact.
Evidence Acquisition: We review scientific literature on the pathophysiology and diagnosis of PCOS evaluating the most relevant data from original articles, reviews and meta-analyses published until June 2024.
Evidence Synthesis: From a pathophysiological point of view, the concurrence of both metabolic aspects, such as insulin resistance and obesity, and hormonal alterations, such as hyperandrogenemia, might produce the most relevant clinical signs and/symptoms of this syndrome, for instance menstrual irregularities, hair loss, acne and hirsutism.
Background: Apart from massive weight loss, metabolic and bariatric surgery, especially gastric bypass (Roux-en-Y gastric bypass [RYGB]), can cause nutritional deficiencies. Proton pump inhibitors (PPI), relatively often used after RYGB, are associated with reduced calcium absorption. We have studied the long-term impact of PPI upon calcium homeostasis among RYGB patients.
View Article and Find Full Text PDFInt J Mol Sci
January 2025
Department of Medical, Surgical and Neurological Sciences, University of Siena, 53100 Siena, Italy.
Obesity is a global epidemic associated with chronic inflammation, oxidative stress, and metabolic disorders. Bariatric surgery is a highly effective intervention for sustained weight loss and the improvement of obesity-related comorbidities. However, post-surgery nutritional deficiencies, including vitamin E, remain a concern.
View Article and Find Full Text PDFMagnes Res
January 2025
Department of neurosurgery, Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University, Hangzhou 310007, Zhejiang, China.
This study aimed to explore the association between serum vitamin D and/or dietary magnesium intake levels and severe hepatic steatosis. This cross-sectional study collected data from 2,874 individuals in the NHNAES database between 2017 and 2018. Variables were subjected to weighted univariate logistic regression analysis, and variables with p<0.
View Article and Find Full Text PDFObesity (Silver Spring)
February 2025
Veterans Affairs Medical Center, Washington, DC, USA.
Introduction: Thiamine deficiency is common after bariatric surgery, but patients with obesity may be deficient in thiamine even before surgery. The purpose of this research was to determine the prevalence of thiamine deficiency in patients with obesity at a medical weight-management clinic and assess the relationship between recent weight loss and thiamine deficiency.
Methods: For this observational study, medical records were reviewed for patients (n = 146) at the nonsurgical obesity medicine and preoperative bariatric surgery clinic at a Veterans Affairs Medical Center between January 1, 2012, and January 31, 2019.
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