The purpose of this study is to determine the effect of feeding frequency on glucose and insulin metabolism and substrate partitioning in impaired glucose tolerant (IGT) men.

Inclusion Criteria:

• BMI: 20-35 kg/m2
• Gender: Male
• Age: subjects has to be older than 18 and younger than 70 years old
• Impaired Glucose Tolerant (IGT) = plasma glucose, two hours after consuming 75g glucose, appears to be superior to 7.8mmol/l (normal level) but remains inferior to 11.1mmol/l (diabetes level) and fasting plasma glucose is less than 7.0mmol/l.
• Caucasian

Exclusion Criteria:

1. Lactose intolerant
2. Diabetes Mellitus
3. Cardiovascular diseases
4. Stomach and intestinal diseases
5. Normal glucose levels after 2 hours
6. Anticoagulants
7. Medication that has a effect on energy and glucose homeostasis and absorption of foods
8. Conditions or situations when subjects can't lose 500 ml blood