This data is for a study on millet couscous gastric (stomach) simulation and emptying. The basis for this research was a previous human crossover study we did in Mali showing that traditional starchy foods made from millet and sorghum (millet and sorghum thick porridges, and millet couscous) had gastric half-emptying times that were about twice as long as other non-traditional foods (white rice, boiled white potato, well-cooked wheat-based pasta). Here, we investigated the reasons for the slow gastric emptying of millet couscous. The dataset is an Excel spreadsheet containing simulated gastric data on different couscous samples as described in the publication cited below. The data spreadsheet also includes viscosity data ("RVA" tab) and chromatography molecular size data for starch ("HPSEC" tab).