Essentially all of the published data on anthocyanin absorption in humans are from short term studies - a few days or less, most typically 24 h. However human studies demonstrating clinical effects are typically conducted for several weeks or even months. To examine how anthocyanin absorption and metabolism may be affected this study will examine urinary excretion of anthocyanins over one month, followed by a one week washout, and then one more dose of blueberry juice.

Inclusion Criteria:

• Provided written consent (see: Information and Consent Form)
• Fluent in English
• Complete a confidential medical questionnaire (Appendix 6)
• Able and willing to abide by the dietary restrictions as described
• Able and willing to abide by the urine collection protocols as described

Exclusion Criteria:

• No written consent
• No confidential medical questionnaire
• Unable to comply with diet restrictions and other study requirements