The Effect of Fiber Snack Foods on Dietary Intake in Healthy Adults
Condition: Fructooligosaccharide
Study type: Interventional

Summary: 
      The proposed study will be a randomized, double-blind, parallel-arm study. Participants will
      incorporate snack foods (bar/yogurt) containing 16 grams of fiber (fructooligosaccharide) or
      similar snack foods without the added fiber into their usual diets. The study period will
      include a 2-week pre-baseline assessment period and an 8-week treatment period. During the
      2-week pre-baseline period no study foods will be consumed however dietary intake will be
      assessed using a 24-hour online diet recall program. The first week of the 8-week treatment
      will serve as an acclimation period where only one serving of the study foods will be given
      (8 grams of fiber) per day. Participants will receive two servings (16 grams of fiber) per
      day for weeks 2 through 8 of the treatment period and 24-hour online diet recalls will be
      completed during weeks 4, 6 and 8.

      Hypothesis:

      Adults aged 18 to 50 years consuming their usual diet modified by incorporating yogurt and
      snack bars containing 16 grams of chicory root fiber (Frutalose®) will decrease their usual
      dietary intake to a greater extent compared to participants who receive similar snack foods
      without the added fiber.
    

Detailed description: 
      The description of study activities is below:

      Screening Period (approximately 2 weeks before randomization):

        -  Obtain height and weight

        -  Complete a 10-question survey about fruit, vegetable, and fiber intake

        -  Receive training on how to complete daily questionnaires online

        -  Complete the Global Physical Activity Questionnaire. This is a 16-question survey asking
           about physical activity in a typical week

        -  Complete the Eating Inventory. This is a 51-question survey that asks about your dietary
           habits and feelings related to food and eating

        -  Receive training on how to record your dietary intake using the ASA24. The ASA24 is a
           web-based interactive program that asks you to record the foods you ate during the
           previous day

      Randomization:

        -  Measure weight, waist circumference, and body composition. We will use the BodPod to
           measure your body composition. The BodPod uses air displacement to measure body volume

        -  Receive dietary counseling on how to incorporate the study foods into your current diet.
           You will be asked to use these foods to replace foods you are currently eating

        -  Consume one study food per day for the first week and then 2 foods per day for weeks 2
           through 8.

        -  Complete the 10-question online daily survey

        -  Complete 7 days of 24-hour dietary recalls using the ASA24 during weeks 4, 6, and 8

      Final:

        -  Return any uneaten study foods.

        -  Measure weight, waist circumference, and body composition

        -  Complete the Global Physical Activity Questionnaire (GPAQ) and the Eating Inventory
    

Intervention name(s): Control study food with no added fiber; Study food with added fiber
Intervention type(s): Dietary Supplement; Dietary Supplement
Intervention description(s): Adults consuming their usual diet modified by incorporating yogurt and snack bars without added fiber.; Adults consuming their usual diet modified by incorporating yogurt and snack bars containing 16 g of chicory root fiber (Frutalose®).
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: Double (Participant, Investigator)
Keywords: Diet; Fiber; Adult; Fructooligosaccharide