Effect of Oat Bran on Bowel Function and Appetite (OATGUT)

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DSM Nutritional Products




Gastrointestinal Disorder, Functional


Other: Maltodextrin
Other: Oat bran (Oatwell 28)

Study type


Funder types




Details and patient eligibility


The consumption of oat bran fiber also has a significant bulking effect in humans. However, besides fecal bulk, dietary fiber can promote gut health in other ways. Therefore, the purpose of this study is to investigate the effects of oat bran (rich in oat beta-glucan) supplementation on bowel function and appetite.

Full description

The study is a randomized, double-blind, placebo-controlled crossover study it involves a total of 8 visits with a 14 day run-in period for total study duration of 84 days. A washout period of 2 weeks will occur in between the 2, 28 day treatment periods. The effects of an oat bran beverage for breakfast on bowel function will be tested after 2 week and 4 weeks of intake.




18 to 60 years old


Accepts Healthy Volunteers

Inclusion criteria

  • Healthy male or female between the ages of 18-60 years
  • Subject has a body mass index of ≥18.5 and ≤30 kg/m2 at screening visit.
  • Subject is willing to stick to their normal habitual diet excluding the consumption of any unusual high energy-rich or fat-rich meals or prolonged fasting, etc. through the study period.
  • Subject is willing to maintain their habitual physical activity patterns throughout the study period.
  • Subject has been weight stable within the last 6 months.
  • Subject has no health conditions that would prevent him or her from fulfilling the study requirements as judged by the investigator on the basis of medical history and routine laboratory test results.
  • Low fiber consumer (≤14 g per day)
  • Subject is willing to follow study procedures and dietary restrictions (ex: stick to habitual diet, refrain from consuming alcohol 24 hours prior to test days).

Exclusion criteria

  • History of a gastrointestinal disorder
  • Lactose intolerant
  • High fiber consumer (≥15 g per day)
  • Use of pre-and probiotics in the past 90 days
  • High protein consumer (i.e. vegetarians or those who follow diets high in protein such as paleo)
  • History of psychological illness or conditions that may interfere with subjects ability to understand study directions
  • Use of antibiotics or signs of active systemic infection in the last 6 months.
  • Subjects who are on hypo/hypercaloric diet aiming for weight loss or weight gain
  • History or presence of cancer in the prior 2 years (except for non-melanoma skin cancer).
  • Currently pregnant, lactating or planning to be pregnant during the study period
  • Regular use of dietary supplements (ex: fish oil, riboflavin, etc.), 90 days prior to study inclusion
  • Exposure to any non-registered drug product within the last 30 days prior to screening visit
  • History of or strong potential for alcohol or substance abuse (within 12 months of screening visit). Alcohol abuse is defined as >60g (men)/40g (women) pure alcohol per day (1.5 L/ 1 l beer resp. 0.75l/0.5l wine).
  • Allergy or sensitivity to oat bran or any meals or snacks provided
  • Current smoker or use of tobacco products in the past 90 days
  • Concurrent or recent participation (30 days) in a dietary intervention trial
  • Anything in the judgment of the investigator would interfere with the subject's ability to comply with the study (protocol), which might confound the interpretation of the study results, or put the subject at undue risk.

Trial design

Primary purpose

Basic Science



Interventional model

Crossover Assignment


Quadruple Blind

0 participants in 2 patient groups, including a placebo group

Oat bran (Oatwell 28)
Active Comparator group
A beverage containing 11 gram (3 gram of oat beta-glucan) of Oat bran (Oatwell 28) will be consumed before breakfast
Other: Oat bran (Oatwell 28)
Placebo Comparator group
A beverage containing 11 gram of maltodextrin will be consumed before breakfast.
Other: Maltodextrin

Trial contacts and locations



Data sourced from clinicaltrials.gov

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