Inclusion Criteria:  Healthy human adults age 18-55 years old (females have to be premenopausal) Typically consume low fiber/polyphenol diet (beige diet)  Exclusion Criteria:  Eating a high fiber/polyphenol diet or taking any medication or dietary supplement, which interfere with the absorption of polyphenols. History of gastrointestinal surgery, diabetes mellitus on medications, or other serious medical condition, such as chronic hepatic or renal disease, bleeding disorder, congestive heart disease, chronic diarrhea disorders, myocardial infarction, coronary artery bypass graft, angioplasty within 6 months prior to screening, current diagnosis of uncontrolled hypertension (defined as systolic BP >160mmHg, diastolic BP > 95mmHg), active or chronic gastrointestinal disorders, bulimia, anorexia, laxative abuse, or endocrine diseases (except thyroid disease requiring medication) as indicated by medical history or routine physical examination. Screening laboratory value outside of the laboratory normal range that is considered clinically significant for study participation by the investigator. Is unable or unwilling to comply with the study protocol. Using prebiotics, probiotics, yogurt, and/or any fiber supplements regularly Allergy or sensitivity to grapes. Subjects will be excluded if there is a prior history of such sensitivity. Since these foods are commonly eaten and allergies are rare, subjects should be aware of this sensitivity prior to entering the study. To determine this, a positive affirmation by the subject of grape ingestion without incident will be requested. Taking antibiotics or laxatives within the past 3 months Allergy or sensitivity to grapes. Subjects will be excluded if there is a prior history of such sensitivity. Since these foods are commonly eaten and allergies are rare, subjects should be aware of this sensitivity prior to entering the study. To determine this, a positive history of grape ingestion without incident will be requested. In addition, any subject with a history of allergy or anaphylaxis of any kind will be excluded Subjects with known allergy to food coloring dyes. In the opinion of the study investigator, any subject who demonstrate a risk of non-compliance with study procedure, or one who cannot read, understand or complete study - related materials.