Although the strength of the evidence base is limited by the small number of studies , observational study design s and method ological weaknesses , the results indicate that short-term positive changes occur post surgery , including reduced caloric intake , contributed to by reductions in fat , carbohydrate and protein intake .
There is a paucity of high- quality evidence regarding changes in dietary intake after LAGB .
BACKGROUND Laparoscopic adjustable gastric b and ing ( LAGB ) is currently one of the most popular surgical obesity treatments worldwide .
Although dietary modification is recognised as a key factor in determining weight loss and health outcomes post surgery , existing evidence regarding changes in dietary intake after LAGB has not been systematic ally evaluated .
This is essential for developing best- practice dietetic guidelines for the management of LAGB patients .
The aim of this systematic review was to evaluate the current evidence base regarding changes in dietary intake after LAGB .
Nutritional Consequences of Adjustable Gastric Banding and Gastric Bypass: A 1-year Prospective Study
Background Gastric bypass ( GBP ) is more efficient than adjustable gastric b and ing ( AGB ) on weight loss and comorbidities , but potentially induces more nutritional deficits . However , no study has compared the prevalence of nutritional deficiencies after these two bariatric procedures .We prospect ively comparedTo prospect ively compare the prevalence of nutritional deficiencies after AGB and GBP . Methods We have performed a 1-year prospect i ve study of nutritional parameters in 70 consecutive severe obese patients , who had undergone bariatric surgery , 21 AGB and 49 GBP .  After GBP , multivitamin supplements were systematic ally prescribed and vitamin B12 supplementation was introduced if a deficiency was observed . Results Patients lost more weight after GBP than after AGB ( 40 ± 13 vs 16 ± 8 kg , p < 0.001 ) . Vitamins B1 and C and iron deficiencies were frequent before surgery but were not worsened by GBP . AGB only induced a slight decrease of vitamin B1 at 1 year , whereas GBP induced significant decreases of vitamins B12 and E , serum prealbumin , and creatinine concentrations , with only minor clinical consequences . Anemia was observed in 10 % of the patients after bariatric surgery . Hemoglobin concentration was not correlated to vitamin B12 or folate concentrations but was related to iron status . Risk of iron deficiency anemia was better assessed by transferrin saturation than by serum ferritin concentration in this obese population . ConclusionS evere nutritional deficits can be avoided after bariatric surgery if patients are systematic ally supplemented with multivitamin and carefully monitored . However , specific care is required to avoid iron and vitamin B12 deficiencies , anemia , and protein malnutrition
Although the strength of the evidence base is limited by the small number of studies , observational study design s and method ological weaknesses , the results indicate that short-term positive changes occur post surgery , including reduced caloric intake , contributed to by reductions in fat , carbohydrate and protein intake .
There is a paucity of high- quality evidence regarding changes in dietary intake after LAGB .
BACKGROUND Laparoscopic adjustable gastric b and ing ( LAGB ) is currently one of the most popular surgical obesity treatments worldwide .
Although dietary modification is recognised as a key factor in determining weight loss and health outcomes post surgery , existing evidence regarding changes in dietary intake after LAGB has not been systematic ally evaluated .
This is essential for developing best- practice dietetic guidelines for the management of LAGB patients .
The aim of this systematic review was to evaluate the current evidence base regarding changes in dietary intake after LAGB .