Postprandial Glycemia in Orange Products

Clinical Nutrition Research Center, Illinois Institute of Technology43 enrolled

Overview

The primary objective of the study is to compare the effects of a whole orange, orange juice alone, and orange juice with pomace on 2 hr glycemic response as measured by maximal glucose concentration.

This study is a randomized, 3-arm, within subject cross-over trial allowing for three acute evaluations of 100% orange juice (250 g), 100% Orange Juice with enzyme-treated orange pomace fiber (157 g orange juice with 100 g orange pomace), and raw orange (227 g edible portion of navel orange) on glucose and insulin response in fifty-two healthy men and women aged 20-45 years. A planned sample size of 52 will be enrolled into the study. This study will require one initial screening visit and 3 study visits. This study will take approximately 3-4 weeks per subject to complete. The initial screening visit will take \~2 hours and provide subject with the informed consent document and determine subject eligibility through anthropometric measurements, body composition measurement, vital signs, fasting blood glucose test (finger prick), a vein access scale evaluation, online 24-hr diet recall, and completion of a survey relate to general eating, health, and exercise habits. For women, a pregnancy test will be conducted. If willing and eligible to participate, subjects will be invited to participate in the study for 3 study days. Eligible subjects will be instructed to follow a relatively low polyphenolic diet for at least 1 week prior the beginning of the study and continue for the duration of the study. Each Study Day visit will last about \~3 hours. The day before each of the 3 Study Day visits, subjects will be asked to consume the same dinner meal and record on a food record. At each Study Day visit, subjects will arrive at the clinic after fasting for 10 to 12 hours and in a well-hydrated and well-rested state. Each study visit will require blood draws throughout the visit. After evaluation of subject's health status (via anthropometric, vital sign and blood glucose measurements and in-person interview), a Licensed health Care Professional will place a catheter in subject's arm for the purpose of multiple blood sample collections and take the initial blood draw in the fasting state. Subjects will be randomized to receive one of study products based on randomized treatment sequences for 3 study visits immediately after fasting blood draw. Participants will come to the research site on 3 separate occasions separated by a washout period. On each occasion 2 fasting blood samples will be obtained at 5 min intervals (-5, 0 minute (min)). Subjects will then consume one of the 3 treatments. Further blood samples will be taken at 15, 25, 30, 35, 40, 45, 60, 75, 90, 105 and 120 min. Self-reported visual analog scales (VAS) will be used to measure subject hunger, fullness, desire to eat, and prospective food intake. After completion of all study procedures and data/sample collection for the day, the catheter will be removed and subjects will be evaluated for safety and/or discomfort/symptoms before leaving the study site. They will be given a take-home snack and given written instructions in preparation for the next visit. Study day visits will be scheduled at least 3 days apart but no more than 7 days.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

SINGLE

Enrollment

Conditions

Healthy

Interventions

Orange Juice1DIETARY_SUPPLEMENT

100% Orange Juice

Orange Juice2DIETARY_SUPPLEMENT

100% Orange Juice with enzyme-treated orange pomace fiber

Raw OrangeDIETARY_SUPPLEMENT

Raw Orange

Eligibility

Sex: ALLMin age: 20 YearsMax age: 45 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * • Subject is a male or female, 20-45 years of age, inclusive. * Subject has a BMI of 20.0-24.9 kg/m2, inclusive and weight ≥ 110 lb. at screening visit. * Subject is willing to maintain his/her usual physical activity pattern throughout the study period. * Subject is willing to follow study instructions including compliance with dietary restrictions, consumption of study beverage, and study visit schedule. * Subject is judged to be in good health on the basis of the medical history. * Subject is willing to abstain from alcohol consumption for 24 hours prior to study visit. * Exercise to be maintained throughout study duration, including 3 days before study visit * Subject is willing to maintain stable dose of current vitamins, minerals, supplements and medications not interfering with study outcomes, including birth control, throughout study duration. * Subject understands the study procedures and signs forms documenting informed consent to participate in the study and authorization for release of relevant protected health information to the study Investigator/s and is willing to complete study procedures Exclusion Criteria: * •Subject has fasting finger prick glucose \>100 mg/dL. * Subject has uncontrolled hypertension (systolic blood pressure ≥160 mm Hg or diastolic blood pressure ≥100 mm Hg) at the screening visit. * Subject has had major trauma or a surgical event within 2 months of study visit 1. * Subject has had a weight change ≥4.5 kg within 2 months of visit, taking weight loss drugs, or has had bariatric surgery or other weight reduction surgery (ie. liposuction, laser fat removal, etc) * Subject has a history or presence of clinically important endocrine, cardiovascular (including, but not limited to, atherosclerotic disease, history of myocardial infarction, peripheral arterial disease, stroke), pulmonary, biliary, or gastrointestinal disorders that, in the opinion of the Investigator, could interfere with the interpretation of the study results. * Subject has a history or presence of cancer in the prior 2 years, except for non-melanoma skin cancer. * Subject has a history of extreme dietary habits, as judged by the Investigator (e.g., Atkins diet, etc.). * Subject has a history of an eating disorder (e.g., anorexia nervosa, bulimia nervosa, or binge eating) diagnosed by a health professional. * Subject has a known intolerance or sensitivity to any ingredients in the study products. * Subject has used medications known to influence carbohydrate metabolism, including, but not limited to adrenergic blockers, diuretics, hypoglycemic medications, and systemic corticosteroids 2 weeks prior to visit 1 and throughout the study. * Subject taking systemic steroids, extreme alcohol use, or drug user. * Subject has vein access score less than 7 * Subject is a female, who is pregnant, planning to be pregnant during the study period or lactating. * Subject is a current smoker. Past smoker abstinence for less than 2 years. * Subject has participated in any clinical trial within 30d prior to enrollment. * No participation in another Sponsored protocol within 6 months prior to enrollment

Locations (1)

Clinical Nutrition Research Center

Chicago, Illinois, United States

Outcomes

Primary Outcomes

Plasma Glucose maximal concentration (Cmax) over 2 hours

Time frame: Postprandial 2 hours

Secondary Outcomes

Changes in Plasma Glucose concentration as measured by incremental area under the curve (iAUC) over 2 hours

Changes in plasma glucose concentration as measured by iAUC over a 2 hour Postprandial Test day after administration of active treatment compared to control treatment

Time frame: Postprandial 2 hours

Data from ClinicalTrials.gov

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