Bioavailability of Compounds From Different Bean Varieties in Healthy Individuals.

A Blinded, Randomized, Controlled Study to Examine the Bioavailability of Compounds From Different Bean Varieties in Healthy Individuals.

This is a single site, blinded, randomized, controlled study designed to examine phytochemical absorption, metabolism and excretion, as well as vascular health and satiety, after ingestion of 4 different bean varieties (pinto, navy, red kidney, black). Eligible participants will attend 6 in-person clinic visits for comparative testing of the 4 bean varieties versus lentils and rice.

This is a single site, blinded, randomized, controlled study designed to examine phytochemical absorption, metabolism and excretion, as well as vascular health and satiety, after ingestion of 4 different bean varieties (pinto, navy, red kidney, black).

Recruitment will consist of a total of 8 volunteers. Volunteers will be recruited through advertisement from the local community.

The study will be conducted at the I.H. Asper Clinical Research Institute,located at the St. Boniface Hospital. Participants will be asked to provide written informed consent prior to participation in the study. Participants who have provided written consent will be asked to attend an in-patient visit to provide a fasting blood sample. Should the participant be eligible to participate, they will be scheduled for six study visits to assess the bioavailability, metabolism and excretion of phytochemicals present in beans compared to lentils and white rice.

Uptake, metabolism and excretion of phytochemicals present in different varieties of beans during acute phase testing in healthy individuals will be examined. Possible relationships between phytochemical composition of the beans, arterial function and satiety will be investigated as the secondary objective.

Inclusion Criteria:

1. Males or females, ≥18 and ≤50 years;
2. Normal blood lipid profile, creatinine ≥7 units/L and ≤56 units/L, alanine aminotransferase (ALT) ≥0.7 mg/dL and ≤1.3 mg/dL for men and ≥0.6 mg/dL and ≤1.1 mg/dL for women, and glycated hemoglobin <6%;
3. Blood pressure <140/90
4. Body mass index (BMI) ≥20 and <30;
5. Stable regime for the past 3 months if taking vitamin and mineral/dietary/ herbal supplements;
6. Agree not to eat beans or bean-based foods, lentils or lentil-based foods, or consume isoflavone supplements while participating in this study;
7. Willing to comply with the protocol requirements;
8. Willing to provide informed consent.

Exclusion Criteria:

1. Allergies to beans, bean flour or bean products, lentils or rice;
2. Presence of a clinically diagnosed disease affecting the circulatory, respiratory, immune, skeletal, urinary, muscular, endocrine, digestive, nervous or reproductive system that requires medical treatment;
3. Taking any prescribed medication in the last 3 months (with the exception of birth control) or supplements that affect gastrointestinal function in the last 3 months;
4. Weight loss of ≥3 kg of body weight within the 6 months prior to enrolling in the study;
5. Current (within the last month) bacterial, viral or fungal infection, or over-the-counter medication within the past 72 hours;
6. Pregnant or lactating;
7. Unable to obtain blood samples at the screening visit or the first study visit.