The purpose of this study is to determine the effect of feeding frequency on glucose and insulin metabolism and substrate partitioning.

Inclusion Criteria:

• BMI: 18.5-25 kg/m2 (lean)
• Gender: Male
• Age: subjects has to be older than 18 and including 35 years old
• Caucasian

Exclusion Criteria:

• Metabolic abnormalities such as:

  1. Lactose intolerant
  2. Diabetes Mellitus
  3. Hypertension
  4. Hypotension
  5. Cardiovascular diseases
  6. Asthma and other obstructive pulmonary diseases
  7. Elevated fasting blood glucose level