Vitamin D supplementation for the prevention of vitamin D deficiency after bariatric surgery: a systematic review and meta-analysis
Abstract
Objective To evaluate the efficacy of vitamin D supplementation on the prevention of postoperative vitamin D deficiency.Methods PubMed, Embase, Web of Science, and Cochrane library were searched. Prospective studies evaluating the effects of vitamin D supplementation in patients who had undergone bariatric surgery were included. Meta-regression was performed to explore heterogeneity, and assess the relationship between dosage of vitamin D supplementation, study design, and prevalence of vitamin D depletion.Results Twelve studies enrolling 1285 patients met the inclusion criteria, and were included. Vitamin D supplementation was associated with significant improvements in 1-year Vitamin D depletion and 1-year 25-OHD level. A daily supplement of more than 800 IU vitamin D significantly reduced the prevalence of 1-year Vitamin D depletion, but the dosage of less than 800 IU did not. Significant decrease in prevalence of 1-year Vitamin D depletion was observed in randomized controlled trials (RCTs), but not in non-RCTs. For the 1-year 25-OHD level, significant elevation was found in the studies irrespective of the study design and dosage of vitamin D supplementation. Meta-regression showed that there was significant relationship between vitamin D depletion and study design, but not between vitamin D depletion and the dosage of vitamin D supplementation.Conclusion Vitamin D supplementation with a daily dosage of more than 800 IU is effective in preventing postoperative vitamin D deficiency and improving the 25-OHD level. However, the results should be interpreted cautiously since there was significant heterogeneity among the studies.
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Vitamin D deficiency was more common in the no supplementation group after bariatric surgery (OR 3.82, 95% CI 1.70 to 8.57).
“Vitamin D deficiency was more common in the no supplementation group (OR 3.82, 95% CI 1.70 to 8.57) (Supplementary Table S33).”
From Clinical practice guidelines of the European Association for Endoscopic Surgery (EAES) on bariatric surgery: update 2020 endorsed by IFSO-EC, EASO and ESPCOP (2020) · cites this paper as [130]
Cites
Preferred Reporting Items for Systematic Reviews and Meta-Analyses: the PRISMA statement
Moher, D., Liberati, A., Tetzlaff, J., Altman, D. G., & for the PRISMA Group (2009) · BMJ · doi:10.1136/bmj.b2535 · Cited by 83,823 · see citing works
Measuring inconsistency in meta-analyses
Higgins, J. P. T., Thompson, S. G., Deeks, J. J., & Altman, D. G. (2003) · BMJ · doi:10.1136/bmj.327.7414.557 · Cited by 63,139 · see citing works
Bias in meta-analysis detected by a simple, graphical test
Egger, M., Smith, G. D., Schneider, M., & Minder, C. (1997) · BMJ · doi:10.1136/bmj.315.7109.629 · Cited by 56,722 · see citing works
Preferred reporting items for systematic reviews and meta-analyses: the PRISMA Statement.
(2009) · PubMed Central · Cited by 44,859 · see citing works
Meta-analysis in clinical trials
DerSimonian, R., & Laird, N. (1986) · Controlled Clinical Trials · doi:10.1016/0197-2456(86)90046-2 · Cited by 39,552 · see citing works
The Cochrane Collaboration's tool for assessing risk of bias in randomised trials
Higgins, J. P. T., Altman, D. G., Gotzsche, P. C., Juni, P., Moher, D., Oxman, A. D., Savovic, J., Schulz, K. F., Weeks, L., Sterne, J. A. C., et al. (2011) · BMJ · doi:10.1136/bmj.d5928 · Cited by 33,817 · see citing works
Operating characteristics of a rank correlation test for publication bias
Begg, C. B., & Mazumdar, M. (1994) · Biometrics · doi:10.2307/2533446 · Cited by 16,955 · see citing works
Holick, M. F. (2007) · New England Journal of Medicine · doi:10.1056/nejmra070553 · Cited by 13,720 · see citing works
Bariatric Surgery: A Systematic Review and Meta-analysis
Buchwald, H., Avidor, Y., Braunwald, E., Jensen, M. D., Pories, W., Fahrbach, K., & Schoelles, K. (2004) · JAMA · doi:10.1001/jama.292.14.1724 · Cited by 6,800 · see citing works
Haslam, D. W., & James, W. P. T. (2005) · The Lancet · doi:10.1016/s0140-6736(05)67483-1 · Cited by 3,757 · see citing works
Metabolic/Bariatric Surgery Worldwide 2011
Buchwald, H., & Oien, D. M. (2013) · Obesity Surgery · doi:10.1007/s11695-012-0864-0 · Cited by 1,698 · see citing works
Mechanick, J. I., Youdim, A., Jones, D. B., Garvey, W. T., Hurley, D. L., McMahon, M. M., Heinberg, L. J., Kushner, R., Adams, T. D., Shikora, S., et al. (2013) · Obesity · doi:10.1002/oby.20461 · Cited by 1,650 · see citing works
Meta-Analysis: Surgical Treatment of Obesity
Maggard, M. A., Shugarman, L. R., Suttorp, M. J., Maglione, M., Sugerman, H. J., Livingston, E. H., Nguyen, N. T., Li, Z., Mojica, W., Hilton, L. G., et al. (2005) · Annals of Internal Medicine · doi:10.7326/0003-4819-142-7-200504050-00013 · Cited by 1,567 · see citing works
Self-citationUncertainty in heterogeneity estimates in meta-analyses
Ioannidis, J. P. A., Patsopoulos, N. A., & Evangelou, E. (2007) · BMJ · doi:10.1136/bmj.39343.408449.80 · Cited by 1,254 · see citing works
National, regional, and global trends in adult overweight and obesity prevalences
Stevens, G. A., Singh, G. M., Lu, Y., Danaei, G., Lin, J. K., Finucane, M. M., Bahalim, A. N., McIntire, R. K., Gutierrez, H. R., Cowan, M. J., et al. (2012) · Population Health Metrics · doi:10.1186/1478-7954-10-22 · Cited by 932 · see citing works
McTigue, K. M., Harris, R., Hemphill, B., Lux, L. J., Sutton, S. F., Bunton, A. J., & Lohr, K. N. (2003) · Annals of Internal Medicine · doi:10.7326/0003-4819-139-11-200312020-00013 · Cited by 601 · see citing works
Nutritional Deficiencies following Bariatric Surgery: What Have We Learned?
Bloomberg, R. D., Fleishman, A., Nalle, J. E., Herron, D. M., & Kini, S. U. (2005) · Obesity Surgery · doi:10.1381/0960892053268264 · Cited by 514 · see citing works
Nutrient deficiencies secondary to bariatric surgery
Alvarez-Leite, J. I. (2004) · Current Opinion in Clinical Nutrition & Metabolic Care · doi:10.1097/00075197-200409000-00010 · Cited by 343 · see citing works
Are vitamin B12 and folate deficiency clinically important after Roux-en-Y gastric bypass?
Brolin, R., Gorman, J. H., Gorman, R. C., Petschenik, A. J., Bradley, L., Kenler, H. A., & Cody, R. P. (1998) · Journal of Gastrointestinal Surgery · doi:10.1016/s1091-255x(98)80034-6 · Cited by 291 · see citing works
Angrisani, L., Lorenzo, M., & Borrelli, V. (2007) · Surgery for Obesity and Related Diseases · doi:10.1016/j.soard.2006.12.005 · Cited by 287 · see citing works
Vitamin status after bariatric surgery: a randomized study of gastric bypass and duodenal switch
Aasheim, E. T., Björkman, S., Søvik, T. T., Engström, M., Hanvold, S. E., Mala, T., Olbers, T., & Bøhmer, T. (2009) · American Journal of Clinical Nutrition · doi:10.3945/ajcn.2009.27583 · Cited by 277 · see citing works
Gasteyger, C., Suter, M., Gaillard, R. C., & Giusti, V. (2008) · American Journal of Clinical Nutrition · doi:10.1093/ajcn/87.5.1128 · Cited by 219 · see citing works
The Obesity Epidemic: The USA as a Cautionary Tale for the Rest of the World
Imes, C. C., & Burke, L. E. (2014) · Current Epidemiology Reports · doi:10.1007/s40471-014-0012-6 · Cited by 187 · see citing works
Prevalence of vitamin D depletion among morbidly obese patients seeking gastric bypass surgery
Carlin, A. M., Rao, D. S., Meslemani, A. M., Genaw, J. A., Parikh, N. J., Levy, S., Bhan, A., & Talpos, G. B. (2006) · Surgery for Obesity and Related Diseases · doi:10.1016/j.soard.2005.12.001 · Cited by 162 · see citing works
Mechanick, J. I., Kushner, R. F., Sugerman, H., González-Campoy, J. M., Collazo–Clavell, M. L., Guven, S., Spitz, A. Z., Apovian, C. M., Livingston, E. H., Brolin, R. E., et al. (2008) · Endocrine Practice · doi:10.4158/ep.14.3.318 · Cited by 144 · see citing works
Vitamin, Mineral, and Drug Absorption Following Bariatric Surgery
Sawaya, R. A., Jaffe, J., Friedenberg, L., & Friedenberg, F. K. (2012) · Current Drug Metabolism · doi:10.2174/138920012803341339 · Cited by 140 · see citing works
Hypovitaminosis D in bariatric surgery: A systematic review of observational studies
Chakhtoura, M., Nakhoul, N., Shawwa, K., Mantzoros, C. S., & Fuleihan, G. E. (2015) · Metabolism · doi:10.1016/j.metabol.2015.12.004 · Cited by 139 · see citing works
Carlin, A. M., Rao, D. S., Yager, K. M., Parikh, N. J., & Kapke, A. (2009) · Surgery for Obesity and Related Diseases · doi:10.1016/j.soard.2008.08.004 · Cited by 128 · see citing works
Goldner, W. S., Stoner, J. A., Lyden, E. R., Thompson, J. S., Taylor, K. M., Larson, L., Erickson, J. M., & McBride, C. L. (2008) · Obesity Surgery · doi:10.1007/s11695-008-9680-y · Cited by 112 · see citing works
Nutritional Profile of Patients Before and After Roux-en-Y Gastric Bypass: 3-Year Follow-up
Blume, C. A., Boni, C. C., Casagrande, D. S., Rizzolli, J., Padoin, A. V., & Mottin, C. C. (2012) · Obesity Surgery · doi:10.1007/s11695-012-0696-y · Cited by 107 · see citing works
Fernando Carrasco, N., Basfi-fer, K., Rojas, P., Valencia, A., Csendes, A., Codoceo, J., Inostroza, J., & Manuel Ruz, O. (2014) · Obesity Surgery · doi:10.1007/s11695-014-1179-0 · Cited by 104 · see citing works
Vilarrasa, N., de Gordejuela, A. G. R., Gómez‐Vaquero, C., Pujol, J., Elío, I., José, P. S., Toro, S., Casajoana, A., & Gómez, J. M. (2013) · Obesity Surgery · doi:10.1007/s11695-013-1016-x · Cited by 88 · see citing works
Frame, L. A., Zeng, X., Caufield-Noll, C. P., Schweitzer, M., Magnuson, T. H., & Steele, K. E. (2016) · Surgery for Obesity and Related Diseases · doi:10.1016/j.soard.2016.01.001 · Cited by 85 · see citing works
Daily vitamin supplementation and hypovitaminosis after obesity surgery
Donadelli, S. P., Junqueira‐Franco, M. V. M., Donadelli, C. A. D. M., Salgado, W., Ceneviva, R., Marchini, J. S., dos Santos, J. E., & Nonino, C. B. (2011) · Nutrition · doi:10.1016/j.nut.2011.07.012 · Cited by 70 · see citing works
Effect of gastric bypass surgery on vitamin D nutritional status
Carlin, A. M., Rao, D. S., Yager, K. M., Genaw, J. A., Parikh, N. J., & Szymanski, W. (2006) · Surgery for Obesity and Related Diseases · doi:10.1016/j.soard.2006.09.003 · Cited by 69 · see citing works
Flores, L., Martínez Osaba, M. J., Andreu, A., Moizé, V., Rodríguez, L., & Vidal, J. (2010) · Obesity Surgery · doi:10.1007/s11695-010-0138-7 · Cited by 62 · see citing works
Enrique Lanzarini, S., Nogués, X., Goday, A., Benaiges, D., Ramón, M., Villatoro, M., Pera, M., Grande, L., & Ramón, J. M. (2015) · Obesity Surgery · doi:10.1007/s11695-015-1572-3 · Cited by 59 · see citing works
Doğan, K., Aarts, E. O., Koehestanie, P., Betzel, B., Ploeger, N., de Boer, H., Aufenacker, T. J., van Laarhoven, K. J. H. M., Janssen, I. M. C., & Berends, F. J. (2014) · Medicine · doi:10.1097/md.0000000000000169 · Cited by 54 · see citing works
Vitamin status after gastric bypass and lifestyle intervention: a comparative prospective study
Aasheim, E. T., Johnson, L. K., Hofsø, D., Bøhmer, T., & Hjelmesaeth, J. S. (2011) · Surgery for Obesity and Related Diseases · doi:10.1016/j.soard.2011.01.038 · Cited by 53 · see citing works
Mahlay, N. F., Verka, L. G., Thomsen, K., Merugu, S., & Salomone, M. (2008) · Obesity Surgery · doi:10.1007/s11695-008-9698-1 · Cited by 52 · see citing works
Pharmacotherapy Prevention and Management of Nutritional Deficiencies Post Roux-en-Y Gastric Bypass
Levinson, R., Silverman, J. B., Catella, J. G., Rybak, I., Jolin, H. A., & Isom, K. A. (2013) · Obesity Surgery · doi:10.1007/s11695-013-0922-2 · Cited by 50 · see citing works
Laparoscopic Gastric Sleeve and Micronutrients Supplementation: Our Experience
Capoccia, D., Coccia, F., Paradiso, F., Abbatini, F., Casella, G., Basso, N., & Leonetti, F. (2012) · Journal of Obesity · doi:10.1155/2012/672162 · Cited by 49 · see citing works
Wakolbinger, M., Kruschitz, R., Kienbacher, C., Traussnigg, S., Langer, F. B., Prager, G., Schindler, K., Kállay, E., Hoppichler, F., Trauner, M. A., et al. (2016) · Obesity Surgery · doi:10.1007/s11695-016-2437-0 · Cited by 39 · see citing works
Homan, J., Schijns, W., Aarts, E. O., van Laarhoven, C. J. H. M., Janssen, I. M. C., & Berends, F. J. (2015) · Surgery for Obesity and Related Diseases · doi:10.1016/j.soard.2015.12.010 · Cited by 39 · see citing works
Flores, L., Moize, V. L., Ortega, E., Rodríguez, L., Andreu, A., Filella, X., & Vidal, J. (2014) · Obesity Surgery · doi:10.1007/s11695-014-1393-9 · Cited by 33 · see citing works
Boyce, S. G., Goriparthi, R., Clark, J., Cameron, K., & Roslin, M. S. (2015) · Obesity Surgery · doi:10.1007/s11695-015-1853-x · Cited by 32 · see citing works
Moore, C. E., & Sherman, V. (2014) · Obesity Surgery · doi:10.1007/s11695-014-1441-5 · Cited by 31 · see citing works
Wolf, E., Utech, M., Stehle, P., Büsing, M., Helfrich, H., Stoffel‐Wagner, B., Egert, S., Alteheld, B., Riege, R., Knapp, A., et al. (2015) · Obesity Surgery · doi:10.1007/s11695-015-2004-0 · Cited by 31 · see citing works
A Systematic Review: Vitamin D Status and Sleeve Gastrectomy
Dix, C. F., Bauer, J. D., & Wright, O. R. L. (2016) · Obesity Surgery · doi:10.1007/s11695-016-2436-1 · Cited by 27 · see citing works
Rosa, C. L. D. S., Saubermann, A. P. D. O., Jacqueline, J., Pereira, S., Saboya, C. J., & Ramalho, A. (2013) · PubMed · doi:10.3305/nh.2013.28.1.6166 · Cited by 20 · see citing works
RAMOS, N. M. C. P. D. J., Magno, F. C. C. M., Cohen, L., Rosado, E. L., & Carneiro, J. R. I. (2015) · ABCD Arquivos Brasileiros de Cirurgia Digestiva (São Paulo) · doi:10.1590/s0102-67202015000100012 · Cited by 17 · see citing works
Silva, J. S., Chaves, G. V., Stenzel, A., Pereira, S., Saboya, C. J., & Ramalho, A. (2016) · Surgery for Obesity and Related Diseases · doi:10.1016/j.soard.2016.09.002 · Cited by 15 · see citing works
Smelt, H. J. M., Pouwels, S., Said, M., Berghuis, K. A., Boer, A., & Smulders, J. F. (2016) · Obesity Surgery · doi:10.1007/s11695-016-2207-z · Cited by 5 · see citing works
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Kim, K. K., Haam, J.-H., Kim, B. T., Kim, E. M., Park, J. H., Rhee, S. Y., Jeon, E. J., Kang, E., Nam, G. E., Koo, H. Y., et al. (2023) · Journal of Obesity & Metabolic Syndrome · doi:10.7570/jomes23016 · Cited by 163 · see citing works
Quilliot, D., Coupaye, M., Ciangura, C., Czernichow, S., Sallé, A., Gaborit, B., Alligier, M., Nguyen‐Thi, P., Dargent, J., Msika, S., et al. (2021) · Journal of Visceral Surgery · doi:10.1016/j.jviscsurg.2020.10.013 · Cited by 52 · see citing works
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- Authors
- Li, Z., Zhou, X., & Fu, W.
- Affiliations
- Peking University Third Hospital (CN)
- Corresponding author
- Fu, Wei
- Venue
- European Journal of Clinical Nutrition
- Published
- 2017-12-29
- Volume
- 72
- Issue
- 8
- Pages
- 1061-1070
- ISSN
- 0954-3007 (ISSN-L)
- 1476-5640
- OpenAlex
- W2777591124
- Cited by
- 25
- References
- 54
- Citations by year
- 2025: 1 · 2024: 4 · 2023: 6 · 2022: 5 · 2021: 4 · 2020: 3 · 2019: 2
- FWCI
- 0.22
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- European Journal of Clinical Nutrition (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Pathology and Forensic Medicine › Vitamin D Research Studies
- Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutrition and Health Studies
- Keywords
- vitamin D supplementation, vitamin D deficiency, bariatric surgery, 25-hydroxyvitamin D, obesity
- MeSH terms
- Adult, Gastrectomy, Humans, Middle Aged, Vitamin D, Vitamin D Deficiency, Gastric Bypass, Randomized Controlled Trials as Topic, Dietary Supplements, Bariatric Surgery
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