Glycaemic response to varying the proportions of carbohydrate and vegetables within a meal

This is a dietary intervention study in which healthy young adults will consume test meals with differing proportions of carbohydrate (rice or pasta based meals) and non-starchy vegetables. Half of the participants will be randomised to receive pasta-based meals and the other half to receive rice-based meals. Within each intervention group participants will consume a meal with 30g and 60g of available carbohydrate at two separate testing sessions. The amount of rice and pasta corresponding to the 30 and 60g available carbohydrate will be 100 and 200g, respectively. The amount of non-starchy vegetables on the plate will be 250 and 150g, respectively (ie: a gram for gram replacement of rice or pasta with non-starchy vegetables). The amount of mince and sauce will be constant at 200g. The total weight of each meal will be 550g. Participant’s blood glucose concentration will be measured prior to consuming the meal and then at 15, 30, 45, 60 and 90 minutes after this time point. The order of test meal consumption will be randomised. The meals will be served hot (>65 deg C). Participants will consume the meals with instruction to finish all of the food on the plate in their own time while under supervision at the study site. The washout period between successive lunch meals will be one week.