Nutritional formulas are commonly consumed by individuals both to supplement their food intake and as total meal replacers. Consumption rates of nutritional formulas are increasing also in Asia. Very little is known about differences in the glycaemic response to nutritional formulas between different ethnic groups. The aim of the current study is to determine the glycaemic response (GR) and glycaemic index (GI) to three nutrition formulas in Chinese, Indian and Malay subjects.