The efficacy of energy-restricted diets in achieving preoperative weight loss for bariatric patients: A systematic review.

Fathimath Naseer, Asim Shabbir, Barbara Livingstone, RK Price, Nicholas L Syn, Orla Flannery

Research output: Contribution to journalArticle

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Abstract

In bariatric practice, a preoperative weight loss of at least 5% is recommended. However, the hypocaloric diets prescribed vary and no consensus exists. This study examined the efficacy of preoperative diets in achieving 5% weight loss. From a systematic literature search, eight randomised controlled trials (n = 862) were identified. Half of the trials used a “very-low-calorie diet” whilst the rest employed a “low-calorie diet”. Only five diets achieved ≥ 5% weight loss over varying durations and energy intakes. By inference, compliance with a 700–1050 kcal (2929–4393 kJ) diet, consisting of moderate carbohydrate, high protein and low/moderate fat, for 3 weeks is likely to achieve 5% weight loss. A low-carbohydrate diet (< 20 g/day) may achieve this target within a shorter duration. Additional research is required to validate these conclusions.
LanguageEnglish
Pages3678-3690
Number of pages13
JournalObesity Surgery
Volume28
Issue number11
Early online date18 Aug 2018
DOIs
Publication statusPublished - Nov 2018

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Bariatrics
Weight Loss
Diet
Caloric Restriction
Carbohydrate-Restricted Diet
Energy Intake
Randomized Controlled Trials
Fats
Carbohydrates
Research
Proteins

Cite this

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title = "The efficacy of energy-restricted diets in achieving preoperative weight loss for bariatric patients: A systematic review.",
abstract = "In bariatric practice, a preoperative weight loss of at least 5{\%} is recommended. However, the hypocaloric diets prescribed vary and no consensus exists. This study examined the efficacy of preoperative diets in achieving 5{\%} weight loss. From a systematic literature search, eight randomised controlled trials (n = 862) were identified. Half of the trials used a “very-low-calorie diet” whilst the rest employed a “low-calorie diet”. Only five diets achieved ≥ 5{\%} weight loss over varying durations and energy intakes. By inference, compliance with a 700–1050 kcal (2929–4393 kJ) diet, consisting of moderate carbohydrate, high protein and low/moderate fat, for 3 weeks is likely to achieve 5{\%} weight loss. A low-carbohydrate diet (< 20 g/day) may achieve this target within a shorter duration. Additional research is required to validate these conclusions.",
author = "Fathimath Naseer and Asim Shabbir and Barbara Livingstone and RK Price and Syn, {Nicholas L} and Orla Flannery",
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The efficacy of energy-restricted diets in achieving preoperative weight loss for bariatric patients: A systematic review. / Naseer, Fathimath; Shabbir, Asim ; Livingstone, Barbara; Price, RK; Syn, Nicholas L; Flannery, Orla .

In: Obesity Surgery, Vol. 28, No. 11, 11.2018, p. 3678-3690.

Research output: Contribution to journalArticle

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AU - Naseer, Fathimath

AU - Shabbir, Asim

AU - Livingstone, Barbara

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AU - Syn, Nicholas L

AU - Flannery, Orla

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