Preprint Article Version 1 This version not peer reviewed

The Effect of a Diet Moderately High in Protein and Fiber on Insulin Sensitivity Measured Using the Dynamic Insulin Sensitivity and Secretion Test (DISST)

Version 1 : Received: 8 November 2017 / Approved: 8 November 2017 / Online: 8 November 2017 (16:20:47 CET)

A peer-reviewed article of this Preprint also exists.

Te Morenga, L.; Docherty, P.; Williams, S.; Mann, J. The Effect of a Diet Moderately High in Protein and Fiber on Insulin Sensitivity Measured Using the Dynamic Insulin Sensitivity and Secretion Test (DISST). Nutrients 2017, 9, 1291. Te Morenga, L.; Docherty, P.; Williams, S.; Mann, J. The Effect of a Diet Moderately High in Protein and Fiber on Insulin Sensitivity Measured Using the Dynamic Insulin Sensitivity and Secretion Test (DISST). Nutrients 2017, 9, 1291.

Journal reference: Nutrients 2017, 9, 1291
DOI: 10.3390/nu9121291

Abstract

Evidence shows that weightloss improves insulin sensitivity but few studies have examined the effect of macronutrient composition independently of weight loss on direct measures of insulin sensitivity. We randomised 89 overweight or obese women to either a standard diet (StdD) that was intended to be low in fat and relatively high in carbohydrate (n=42) or to a relatively high protein (up to 30% of energy), relatively high fibre (>30g/day) diet (HPHFib) (n=47) for 10 weeks. Advice regarding strict adherence to energy intake goals was not given. Insulin sensitivity and secretion was assessed by a novel method - the Dynamic Insulin Sensitivity and Secretion Test (DISST). Although there were significant improvements in body composition and most cardiometabolic risk factors on HPHFib, insulin sensitivity was reduced by 19.3% (95% CI: 31.8, 4.5%; p=0.013) in comparison with StdD. We conclude that the reduction in insulin sensitivity after a diet relatively high in both protein and fibre, despite cardiometabolic improvements, suggests insulin sensitivity may reflect metabolic adaptations to dietary composition for maintenance of glucose homeostasis, rather than impaired metabolism.

Subject Areas

diet; dietary protein; dietary fibre; insulin sensitivity assessment; insulin sensitivity; insulin resistance; metabolic syndrome

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