Original Article

The short-term influence of gastric bypass surgery on dietary intakes in morbidly obese patients


Background: Obesity is recognized as a major public-health problem, which has reached epidemic proportions, in both developed and developing countries. The purpose  of   this   survey  is   to   study  effects  of   gastric  bypass  surgery  at micronutrients and macronutrients intake on patients with morbid obesity.
Methods:   This quasi-experimental study was conducted on 21    patients. Anthropometry information (weight, height, age, and gender) and three 24-hour recall questionnaires were completed for each participant: Before surgery and 3 months after surgery.
Results: The total intake of macronutrients including carbohydrate, protein and fat decreased between baseline at 3 months post-surgery that was statistically significant for all of the macro-nutrients (p < 0.001). There was a reduction of energy intake from carbohydrate (54.81% ± 20.03% to 44.34% ± 14.59%, p = 0.059) and the energy intake from protein (18.57% ± 5.73% to 26.24% ± 9.83%, p = 0.001) and fat (31.06%± 8.64% to 35.18% ± 25.41%, p = 0.460) along the prospective follow-up period compared to previous values. The mean intake of all micronutrients had decreased during follow-up that was statistically significant for B group vitamins (B1, B2, B3, and B6), float, iron, zinc and copper (p < 0.017 for vitamin B2, p < 0.001 for others).
Conclusion: Our data demonstrate that low dietary intake of energy, micro- and macro-nutrients  absolute   values  and   relative   to   the   recommended   dietary allowances and estimated average requirements, are highly prevalent after Roux- en-Y  gastric  bypass  (RYGB)  surgery.  Therefore  dietary  counseling,  clinical assessments, and the recommendation of supplements if needed in pre- and post- operatively, might be considered for health promotion after RYGB surgeries.

Flegal KM, Carroll MD, Kit BK, Ogden CL.Prevalence of obesity and trends in the distribution of body mass index among US adults,1999-2010. JAMA. 2012; 307(5): 491-7.

Calle EE, Rodriguez C, Walker-Thurmond K, Thun MJ. Overweight, obesity, and mortality from cancer in a prospectively studied cohort of U.S. Adults. N Engl J Med. 2003; 348: 1625-38.

Finucane MM, Stevens GA, Cowan MJ, Danaei G, Lin JK, Paciorek CJ, et al. National, regional,and global trends in body-mass index since 1980: systematic analysis of health examination surveys and epidemiological studies with 960 country- years and 9.1 million participants. Lancet. 2011;377(9765): 557-67.

Janghorbani M, Amini M, Willett WC, Mehdi GM, Delavari A, Alikhani S, et al. First nationwide survey of prevalence of overweight, underweight, and abdominal obesity in Iranian adults. Obesity (Silver Spring). 2007; 15(11):2797-808.

Belle SH, Berk PD, Courcoulas AP, Flum DR, Miles CW, Mitchell JE, et al. Safety and efficacy of bariatric surgery: Longitudinal assessment of bariatric surgery. Surg Obes Relat Dis. 2007; 3(2):116-26.

Buchwald H, Estok R, Fahrbach K, Banel D, Jensen MD, Pories WJ, et al. Weight and type 2 diabetes after bariatric surgery: systematic review and meta- analysis. Am J Med. 2009; 122(3): 248-56.

Decker GA, Swain JM, Crowell MD, Scolapio JS.Gastrointestinal and nutritional complications after bariatric surgery. Am J Gastroenterol. 2007;102(11): 2571-80.

Dalcanale L, Oliveira CP, Faintuch J, Nogueira MA, Rondo P, Lima VM, et al. Long-term nutritional outcome after gastric bypass. Obes Surg. 2010; 20(2): 181-7.

Miller GD, Norris A, Fernandez A. Changes in nutrients and food groups intake following laparoscopic Roux-en-Y gastric bypass (RYGB). Obes Surg. 2014; 24(11): 1926-32.

Warde-Kamar J, Rogers M, Flancbaum L, Laferrere B. Calorie intake and meal patterns up to 4 years after Roux-en-Y gastric bypass surgery. Obes Surg. 2004; 14(8): 1070-9.

Flancbaum L, Choban PS, Bradley LR, Burge JC.Changes in measured resting energy expenditure after Roux-en-Y gastric bypass for clinically severe obesity. Surgery. 1997; 122(5): 943-9.

Westerterp-Plantenga MS, Nieuwenhuizen A, Tome D, Soenen S, Westerterp KR. Dietary protein, weight loss, and weight maintenance. Annu Rev Nutr. 2009; 29: 21-41.

Brehm BJ, D'Alessio DA. Benefits of high-protein weight loss diets: enough evidence for practice? Curr Opin Endocrinol Diabetes Obes. 2008;15(5): 416-21.

Faria SL, Faria OP, Buffington C, de Almeida CM, Ito MK. Dietary protein intake and bariatric surgery patients: a review. Obes Surg. 2011;21(11): 1798-805.

Ocon BJ, Perez NS, Gimeno LS, Benito RP, Garcia HR. Effectiveness and complications of bariatric surgery in the treatment of morbid obesity. Nutr Hosp. 2005; 20(6): 409-14.[In Spanish].

Naslund I, Jarnmark I, Andersson H. Dietary intake before and after gastric bypass and gastroplasty for morbid obesity in women. Int J Obes. 1988; 12(6): 503-13.

Gletsu-Miller N, Wright BN. Mineral malnutrition following bariatric surgery. Adv Nutr. 2013; 4(5):506-17.

Chang CG, Adams-Huet B, Provost DA. Acute post-gastric reduction surgery (APGARS) neuropathy. Obes Surg. 2004; 14(2): 182-9.

Primavera A, Brusa G, Novello P, Schenone A, Gianetta E, Marinari G, et al. Wernicke-Korsakoff Encephalopathy Following Biliopancreatic Diversion. Obes Surg. 1993; 3(2): 175-7.

IssueVol 1, No 3 (Summer 2015) QRcode
SectionOriginal Article(s)
Gastric bypass surgery Food intake Morbid obesity

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
How to Cite
Mirahmadian M, Hasani M, Taheri E, Keshtkar A, Hosseini S, Pazooki A. The short-term influence of gastric bypass surgery on dietary intakes in morbidly obese patients. J Nutr Sci & Diet. 2015;1(3):134-140.