Measuring Daily Grain Intake Study

Eligibility Details: Inclusion Criteria: - Aged 21 - 75 years - non smokers Exclusion Criteria: - Body weight less than 110 lbs. - Have a body mass index below 19 or above 38 kg/m2 - Known (self-reported) allergy or adverse reaction to study foods - Women who have given birth during the previous 12 months or who are pregnant/lactating or who plan to become pregnant during the study - History of bariatric surgery or nutrient malabsorption disease (such as celiac disease), Crohn's disease, diabetes, or metabolic disorders that may interfere with the study - History of certain cancer diagnosis or treatment in the last 3 years - Smoking or use of tobacco products in the past 6 months - Suspected or known strictures, fistulas or physiological/mechanical GI obstruction - Use of certain medications or supplements (prescription or over-the-counter) that may interfere with the study objectives, including blood thinning medications - Unable or unwilling to give informed consent or communicate with study staff - Self-report of alcohol or substance abuse within the past 12 months and/or current treatment for these problems (long-term participation in Alcoholics Anonymous is not an exclusion) - Other medical, psychiatric, or behavioral factors that in the judgment of the Principal Investigator may interfere with study participation or the ability to follow the intervention protocol