{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T22:56:30Z","timestamp":1790204190300,"version":"4.1.0"},"reference-count":9,"publisher":"Hindawi Limited","license":[{"start":{"date-parts":[[2011,1,1]],"date-time":"2011-01-01T00:00:00Z","timestamp":1293840000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Obesity"],"published-print":{"date-parts":[[2011]]},"abstract":"<jats:p><jats:italic>Introduction<\/jats:italic>. Few data are available on vitamin A deficiency in the gastric bypass population.<jats:italic>Methods<\/jats:italic>. We performed a retrospective chart review of gastric bypass patients (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mi>n<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>69<\/mml:mn><\/mml:math>, 74% female). The relationship between serum vitamin A concentration and markers of protein metabolism at 6-weeks and 1-year post-operative were assessed.<jats:italic>Results<\/jats:italic>. The average weight loss at 6-weeks and 1-year following surgery was<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mn>20.1<\/mml:mn><mml:mo>\u00b1<\/mml:mo><mml:mn>9.1<\/mml:mn><\/mml:math>\u2009kg and<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mn>44.1<\/mml:mn><mml:mo>\u00b1<\/mml:mo><mml:mn>17<\/mml:mn><mml:mo>.<\/mml:mo><mml:mn>1<\/mml:mn><\/mml:math>\u2009kg, respectively. At 6 weeks and 1\u2009year after surgery, 35% and 18% of patients were vitamin A deficient, (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mo>&lt;<\/mml:mo><\/mml:math>325\u2009mcg\/L). Similarly, 34% and 19% had low pre-albumin levels (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mo>&lt;<\/mml:mo><\/mml:math>18\u2009mg\/dL), at these time intervals. Vitamin A directly correlated with pre-albumin levels at 6 weeks (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mi>r<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.67<\/mml:mn><\/mml:math>,<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn>0.001<\/mml:mn><\/mml:math>) and 1-year (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mi>r<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.67<\/mml:mn><\/mml:math>,\u2009\u2009<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mml:mi>P<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn>0.0001<\/mml:mn><\/mml:math>). There was no correlation between the roux limb length measurement and pre-albumin or vitamin A serum concentrations at these post-operative follow-ups. Vitamin A levels and markers of liver function testing were also unrelated.<jats:italic>Conclusion<\/jats:italic>. Vitamin A deficiency is common after bariatric surgery and is associated with a low serum concentration of pre-albumin. This fat-soluble vitamin should be measured in patients who have undergone gastric bypass surgery and deficiency should be suspected in those with evidence of protein-calorie malnutrition.<\/jats:p>","DOI":"10.1155\/2011\/760695","type":"journal-article","created":{"date-parts":[[2010,9,14]],"date-time":"2010-09-14T18:03:58Z","timestamp":1284487438000},"page":"1-4","source":"Crossref","is-referenced-by-count":48,"title":["Vitamin A Deficiency after Gastric Bypass Surgery: An Underreported Postoperative Complication"],"prefix":"10.1155","volume":"2011","author":[{"given":"Kerstyn C.","family":"Zalesin","sequence":"first","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"},{"name":"Divisions of Nutrition, and Preventive Medicine, Department of Internal Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wendy M.","family":"Miller","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Barry","family":"Franklin","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dharani","family":"Mudugal","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Avdesh","family":"Rao Buragadda","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Judith","family":"Boura","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katherine","family":"Nori-Janosz","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David L.","family":"Chengelis","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kevin R.","family":"Krause","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter A.","family":"McCullough","sequence":"additional","affiliation":[{"name":"Divisions of Cardiology, Nutrition and Preventive Medicine, Department of Medicine, William Beaumont Hospital, 4949 Coolidge Highway, Royal Oak, MI 48073, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"98","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.295.13.1549"},{"issue":"1","key":"2","first-page":"1","volume":"9","year":"1991","journal-title":"NIH Consensus Development 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