A randomised repeated measures dietary intervention study to measure the effect of “Hayward” and “Sungold” kiwifruit on postprandial blood glucose (glycaemic) response relative to the response to a glucose reference dose, and the effect on glycaemic response of equi-carbohydrate partial exchange of kiwifruit for breakfast cereal, in healthy adult subjects.

Subjects will each consume six diets in random order, with at least two days between diets. The diets will be: 1. Glucose (reference) 40 g dissolved in water, 2. Weet Bix (amount providing 40 g available carbohydrate) 3. Gold kiwifruit (200 g, containing about 20 g cabohydrate) 4. Green kiwifruit (200 g, containing about 20 g cabohydrate) 5. Weet-Bix substituted on an equal glycaemic carbohydrate basis by 200 g “Hayward” kiwifruit (Total carbohydrate intake 40 g; Kiwifruit 200 g, Weet-Bix 30.9 g, water 120 ml) 6. Weet-Bix substituted on an equal glycaemic carbohydrate basis by 200 g “Sungold” kiwifruit (Total carbohydrate intake 40 g; Kiwifruit 200 g, Weet-Bix 27.06 g, water 120 ml). Subjects will be asked to consume diets after an overnight fast and the blood glucose response to the diets will be measured as changes from baseline in blood glucose concentrations measured by finger-prick capillary blood glucose analysis. The procedure is standard in measurement of the glycaemic index of foods. The subjects will consume two diets per week over a period of three weeks.