Is glycaemic index (GI) a valid measure of carbohydrate quality?
- 13 February 2013
- journal article
- review article
- Published by Springer Science and Business Media LLC in European Journal of Clinical Nutrition
- Vol. 67 (5), 522-531
- https://doi.org/10.1038/ejcn.2013.27
Abstract
Recent criticisms of the glycaemic index (GI) focus on its validity with assertions that GI methodology is not valid, GI values are inaccurate and imprecise, GI does not predict what foods are healthy and that whole grain and fibre are better markers of carbohydrate quality than GI. None of the critics provide sound reasons for rejecting GI because some of their arguments are based on flagrant errors in understanding and interpretation while others are not supported by current data or are inconsistent with other nutritional recommendations. This paper addresses current criticisms of GI and outlines reasons why GI is valid: (1) GI methodology is accurate and precise enough for practical use; (2) GI is a property of foods; and (3) GI is biologically meaningful and relevant to virtually everyone. Current dietary guidelines recommend increased consumption of whole grains and dietary fibre but do not mention GI. However, this is illogical because the evidence that GI affects health outcomes is at least as good or better than that for whole grains and fibre. GI is a novel concept from a regulatory point of view and a number of problems need to be addressed to successfully translate GI knowledge into practice. The problems are not insurmountable but no progress can be made until bias and misunderstanding about GI can be overcome and there is better agreement about what is the actual state of knowledge on GI so that the real issues can be identified and addressed.This publication has 106 references indexed in Scilit:
- ‘Catalytic’ doses of fructose may benefit glycaemic control without harming cardiometabolic risk factors: a small meta-analysis of randomised controlled feeding trialsBritish Journal of Nutrition, 2012
- Depression and glycemic intake in the homebound elderlyJournal of Affective Disorders, 2011
- Nutritively sweetened beverage consumption and body weight: a systematic review and meta‐analysis of randomized experimentsObesity Reviews, 2011
- Diets with High or Low Protein Content and Glycemic Index for Weight-Loss MaintenanceThe New England Journal of Medicine, 2010
- The relation of low glycaemic index fruit consumption to glycaemic control and risk factors for coronary heart disease in type 2 diabetesDiabetologia, 2010
- Markers of cardiovascular risk are not changed by increased whole-grain intake: the WHOLEheart study, a randomised, controlled dietary interventionBritish Journal of Nutrition, 2010
- Maternal Dietary Glycemic Intake and the Risk of Neural Tube DefectsAmerican Journal of Epidemiology, 2009
- Effect of a Low–Glycemic Index or a High–Cereal Fiber Diet on Type 2 DiabetesJama-Journal Of The American Medical Association, 2008
- A prospective study of dietary carbohydrate quantity and quality in relation to risk of ovulatory infertilityEuropean Journal of Clinical Nutrition, 2007
- Comparison of 4 Diets of Varying Glycemic Load on Weight Loss and Cardiovascular Risk Reduction in Overweight and Obese Young AdultsArchives of Internal Medicine, 2006