This study is designed to test the effects of the combination of naringenin (from an extract of sweet oranges) and beta carotene on energy expenditure and glucose metabolism in a single human subject.

The subject will be treated for 8 weeks with the combination of naringenin + beta carotene.

We will conduct the following assessments before the treatment and at the end of eight weeks.

1. Resting metabolic rate
2. Oral glucose tolerance test with glucose and insulin
3. Ambulatory blood pressure
4. Recording of adverse events
5. Body weight

Inclusion Criteria:

• Fasting blood glucose < 200mg/dL

Exclusion Criteria:

• Known allergy to citrus fruits