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Randomized Controlled Trial
. 2011 Feb;54(2):271-9.
doi: 10.1007/s00125-010-1927-1. Epub 2010 Oct 27.

The relation of low glycaemic index fruit consumption to glycaemic control and risk factors for coronary heart disease in type 2 diabetes

D J A Jenkins  1 , K Srichaikul, C W C Kendall, J L Sievenpiper, S Abdulnour, A Mirrahimi, C Meneses, S Nishi, X He, S Lee, Y T So, A Esfahani, S Mitchell, T L Parker, E Vidgen, R G Josse, L A Leiter
Affiliations
Randomized Controlled Trial

The relation of low glycaemic index fruit consumption to glycaemic control and risk factors for coronary heart disease in type 2 diabetes

D J A Jenkins et al. Diabetologia. 2011 Feb.

Abstract

Aims/hypothesis: Sugar has been suggested to promote obesity, diabetes and coronary heart disease (CHD), yet fruit, despite containing sugars, may also have a low glycaemic index (GI) and all fruits are generally recommended for good health. We therefore assessed the effect of fruit with special emphasis on low GI fruit intake in type 2 diabetes.

Methods: This secondary analysis involved 152 type 2 diabetic participants treated with glucose-lowering agents who completed either 6 months of high fibre or low GI dietary advice, including fruit advice, in a parallel design.

Results: Change in low GI fruit intake ranged from -3.1 to 2.7 servings/day. The increase in low GI fruit intake significantly predicted reductions in HbA(1c) (r = -0.206, p =0.011), systolic blood pressure (r = -0.183, p = 0.024) and CHD risk (r = -0.213, p = 0.008). Change in total fruit intake ranged from -3.7 to 3.2 servings/day and was not related to study outcomes. In a regression analysis including the eight major carbohydrate foods or classes of foods emphasised in the low GI diet, only low GI fruit and bread contributed independently and significantly to predicting change in HbA(1c). Furthermore, comparing the highest with the lowest quartile of low GI fruit intake, the percentage change in HbA(1c) was reduced by -0.5% HbA(1c) units (95% CI 0.2-0.8 HbA(1c) units, p < 0.001).

Conclusions/interpretation: Low GI fruit consumption as part of a low GI diet was associated with lower HbA(1c), blood pressure and CHD risk and supports a role for low GI fruit consumption in the management of type 2 diabetes.

Trial registration: ClinicalTrials.gov NCT00438698.

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Figures

Fig. 1
Fig. 1
The distribution of average daily carbohydrate (g/day) from consumption of individual fruit for all participants at baseline (n = 152). Black bars, low GI fruit; white bars, higher GI fruit
Fig. 2
Fig. 2
Changes in HbA1c (%) for four quartiles of change in low GI fruit intake. The difference between extremes of quartiles (quartile 1 vs quartile 4) was significant (p = 0.001). Within-treatment differences were assessed by paired t test (*p ≤ 0.05 and ***p ≤ 0.001). Different coloured bars with quartile numbers at the top of the bars represent different quartiles of change in low GI fruit intake
See this image and copyright information in PMC

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