Study on potato consumption will increase confusion regarding food and the risk of gestational diabetesBMJ 2016; 352 doi: https://doi.org/10.1136/bmj.i1188 (Published 02 March 2016) Cite this as: BMJ 2016;352:i1188
- Patrick Mullie, professor1 2,
- Mathieu Boniol, professor1 3,
- Philippe Autier, professor1 3
- 1International Prevention Research Institute, 95 Cours Lafayette, 69006 Lyon, France
- 2Vrije Universiteit Brussel, Elsene, Belgium
- 3Strathclyde University Global Public Health Institute, Lyon, France
Using data from the Nurses’ Health Study II, Bao and colleagues found a higher prevalence of gestational diabetes mellitus (GDM) with increasing potato consumption.1 The authors stated that the high glycaemic index of potatoes, which causes a sharp postprandial rise in blood glucose concentrations and a risk of associated pancreatic β cells exhaustion, could explain this association.
However, use of the glycaemic index has methodological limitations. Dodd and colleagues found that the glycaemic index of a meal is overestimated by 22-50% when a formula is used rather than direct measurement.2 This overestimation was unpredictable and food dependent—for example, it was greater for spaghetti than for potato. …
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