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

1 Citation (Scopus)
17 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)3678-3690
Number of pages13
JournalObesity Surgery
Volume28
Issue number11
Early online date18 Aug 2018
DOIs
Publication statusPublished - 30 Nov 2018

Keywords

  • Obesity
  • Bariatric surgery
  • Metabolic surgery
  • Low-calorie diet
  • Very-low-calorie diet

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