Glycemic index concept is widely used to determine impact of a food to blood glucose. Although the previous studies showed that glycemic index did not seem to be related with subject-specific factors, currently several studies found conflicting results on the relationship of subjects' characteristics and glycemic index values. This study aims to determine whether body composition parameters, as subject-specific factor, correlate with glycemic index values.

Glycemic index methods are performed according to Food and Agricultural Organization/WHO recommendations.

Inclusion Criteria:

• age between 20-40 years
• fasting blood glucose 70-100 mg/dL
• Indonesians

Exclusion Criteria:

• having diabetes
• smoking
• if women, pregnant or lactating
• being allergic to food used in this study
• having gastrointestinal disturbance
• in regular medication
• refusal to sign the consent form

Study participants will be selected from a group of office workers fulfilling inclusion criteria.