Effect of Resistant Starch on Insulin Sensitivity and Beta Cell Function in Subjects With Prediabetes

Effect of Resistant Starch From Green Banana Flour on the Insulin Sensitivity of Subjects With Prediabetes: Randomized Clinical Trial


Lead Sponsor: Hospital de Clinicas de Porto Alegre

Source Hospital de Clinicas de Porto Alegre
Brief Summary

To compare the use supplementation based on green banana flour versus placebo in the insulin sensitivity on individuals who have prediabetes.

Detailed Description

In order to evaluate whether supplementation with green banana flour may improve insulin sensitivity of individuals with prediabetes, volunteers will be recruited by advertising on the web page of Hospital de Clinical de Porto Alegre. After screening and selection, they will be submitted to a clinical, laboratory and nutritional standard evaluation, assessment of physical activity and body fat composition.The laboratory evaluation will include the oral glucose tolerance test (OGGT 75g), lipid profile, insulin, C-peptide, glycated hemoglobin and glycated albumin. Insulin sensitivity and beta-cell function will be assessed by the hyperglycemic CLAMP before and after the intervention.Interim statistical analysis will be performed at the end of the participation of ten study volunteers. Subjects will receive green banana flour or placebo for four weeks.

Overall Status Unknown status
Start Date 2018-10-01
Completion Date 2020-05-01
Primary Completion Date 2019-08-01
Phase N/A
Study Type Interventional
Primary Outcome
Measure Time Frame
Insulin sensitivity 4 weeks
Secondary Outcome
Measure Time Frame
Hormonal changes 4 weeks
Change in lipid profile 4 weeks
Change total body fat 4 weeks
Beta cell function 4 weeks
Glycemic control 4 weeks
Enrollment 20

Intervention Type: Dietary Supplement

Intervention Name: Resistant Starch

Description: Addition of 42g per day of green banana flour (10g / day resistant starch) to the usual diet of study participants

Arm Group Label: Resistant Starch

Intervention Type: Dietary Supplement

Intervention Name: Placebo

Description: Addition of 42g per day of mixture of guar gum, maltodextrin and cellulose to the usual diet of study participants

Arm Group Label: Placebo



Inclusion criteria 1. Serum glycated hemoglobin (A1c) values between 5.7 and 6.5%, or fasting glucose ≥ 5.55 mmol/L and < 6.94 mmol/L or oral glucose tolerance test (75g) ≥7.77 and <11.04 mmol /L. 2. Body mass index (BMI) ≥ 25 kg / m² (≥23 kg / m² for those of Asian origin) and ≤ 35 kg / m² for screening. 3. Stable weight (maximum variation of approximately 5%) for at least 4 weeks prior to screening. 4. Apt and willing to provide the written informed consent term and to comply with the requirements of the study protocol. Exclusion Criteria: 1. Clinically symptomatic gastrointestinal disease including, but not limited to, inflammatory bowel disease. 2. History of gastric bypass, antrectomy, or resection of the small intestine. 3. History of chronic pancreatitis or acute idiopathic pancreatitis. 4. Myocardial infarction, coronary artery bypass grafting, post-transplant cardiomyopathy or stroke in the last 6 months. 5. Any anomaly in clinical laboratory tests which may prevent safe participation in the study. 6. Tumor diagnosed and / or treated (except basal cell skin cancer, cervical carcinoma in situ, or prostate cancer in situ) within the past 5 years. 7. Hemoglobinopathy or chronic anemia known. 8. Donation of one unit (500 ml) or more of blood, significant loss of blood equivalent to at least one unit of blood within the last 2 weeks or blood transfusion in the last 8 weeks. 9. Any concomitant medical condition / disorder which, in the investigator's opinion, is likely to: - Will interfere with the patient's ability to complete the entire study period or participate in all study activities; - Require, during the study, the administration of a treatment that may affect the interpretation of the efficacy and safety data. 10. Treatment with any oral antidiabetic medicinal product and / or herbal preparations / non-prescription medicines that may affect glycemic control within 12 weeks prior to screening. 11. Chronic treatment with oral or parenteral corticosteroids (> 7 consecutive days of treatment) within 4 weeks prior to screening. 12. Treatment with weight-reducing agents (eg, orlistat, sibutramine, topiramate, bupropion) within the last 12 weeks prior to screening. 13. History of unstable hypertension (> 170/105 mmHg) in the last 12 weeks prior to screening. 14. Treatment with a lipid-lowering drug that has not been kept in a stable dose within the last 8 weeks prior to screening. 15. Treatment with thyroid hormone that has not been kept in a stable dose in the last 12 weeks prior to screening. 16. Investigational drug use within 30 days or 5 half-lives (whichever is longer) prior to screening unless guidelines from local health authorities require a longer period. 17. Any of the following laboratory abnormalities in screening: - Alanine aminotransferase (ALT) and / or Aspartate aminotransferase (AST) 3 times the upper limit of normality; - Glomerular filtration estimated by the equation kidney disease ≤ 60 ml per min by 1.73 m². - Fasting triglycerides > 5.6 mmol / L; - Thyroid stimulating hormone (TSH) outside normal range. 18. History of substance abuse (including alcohol) within the last year. 19. Women with potential to become pregnant and / or who are using local or systemic hormonal contraceptive method; Women in the follicular phase of the menstrual cycle and also pregnant and lactating women. 20. Potentially unreliable patients and those considered by the Investigator as unsuitable for the study.



Minimum Age:

20 Years

Maximum Age:

50 Years

Healthy Volunteers:

Accepts Healthy Volunteers

Overall Official
Last Name Role Affiliation
Fernando Gerchman, MD Principal Investigator Federal University of Rio Grande do Sul
Overall Contact Contact information is only displayed when the study is recruiting subjects.
Verification Date


Responsible Party

Type: Sponsor

Has Expanded Access No
Condition Browse
Number Of Arms 2
Arm Group

Label: Resistant Starch

Type: Active Comparator

Description: Green banana flour

Label: Placebo

Type: Placebo Comparator

Description: Maltodextrin, cellulose and guar gum

Patient Data No
Study Design Info

Allocation: Randomized

Intervention Model: Parallel Assignment

Primary Purpose: Treatment

Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact [email protected]. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Clinical Trials on Prediabetes

Clinical Trials on Resistant Starch