Effect of Dragon Fruit Consumption in Individuals at Risk of Type 2 Diabetes

Not Applicable

Completed

• Conditions: Blood Pressure; Glucose Intolerance
• Interventions: Other: Dragon fruit product

• Registration Number: NCT05199636
• Lead Sponsor: Oxford Brookes University

Brief Summary

In this project, an edible product based on dragon fruit will be tested to determine its effect on blood glucose levels and blood pressure in individuals at risk of type 2 diabetes. The effect of a product from dragon fruit on fasting plasma glucose and blood pressure will be assessed by a parallel study design with two groups and 16 participants in each one. Secondary outcomes such as inflammation biomarkers, lipid profile and oxidative stress markers also will be determined in blood samples.

Detailed Description

This will be a parallel study in which two different treatments will be evaluated to determine their effect on glucose, blood pressure, and other outcomes including dietary assessment in individuals at risk of diabetes. The study will last 4 weeks and will involve 3 testing sessions. The participants (N=32) will be randomly divided into two groups and asked either to consume daily a dragon fruit based beverage or to follow a general health guidelines for 4 weeks. The treatment will be taken once a day and a 24 hours dietary recall will be recorded three times during the intervention; the results provided will contribute to understanding the role of polyphenols from the edible products based on dragon fruit on glucose metabolism, blood pressure and linked biomarkers.

Treatment for testing group 1, will include an advice that involve following general health guidelines based on Eatwell Guide and guidelines for type 2 diabetes prevention from the National Institute for Health and Care Excellence (NICE) for 4 weeks. Treatment for testing group 2, will involve drinking a dragon fruit based beverage daily for 4 weeks.

The first visit will start by asking participants to take part in a 24 hours dietary recall and by recording anthropometric measurements. Blood pressure will be taken after 10 minutes of rest (three measurements at five minutes intervals). Venous blood sample will be taken by venepunture to determine fasting blood glucose and biomarkers. Then a standard glucose drink (75g of glucose in 250 ml of water) will be given to determine glucose tolerance, a further venous sample will be taken after 2 hours. Between the 2 hours, finger-prick blood samples will be taken at 0, 15, 30, 45, 60, 90 and 120 minutes intervals, to evaluate the glycaemic and insulin response profile. The treatment will be given to the participant to start the intervention.

The second session will be held 2 weeks after the treatment begins and the protocol established above for the first session will be followed.

After 4 weeks of treatment the third session will be conducted, as mentioned in first and second sessions. Anthropometric measurements will be recorded.

Study Timeline

• Study First Submitted: 2022-01-06
• Study First Submitted QC: 2022-01-06
• Study Start: 2022-01-20
• Study First Posted: 2022-01-20
• Primary Completion: 2023-08-31
• Status Verified: 2023-09
• Study Completion: 2023-09-01
• Last Update Submitted: 2023-09-04
• Last Update Posted: 2023-09-06

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

• Aged 18-50 years who fulfil at least two of the following inclusion criteria:

  • Have a first grade relative with diabetes (parent, brother, or sister)
  • Have a BMI ≥ 25.0.
  • Have a sedentary lifestyle.

Exclusion Criteria

• • Covid-19 related symptoms, during the last 7 days.

  • Allergies to dragon fruit.
  • Diabetes, hypertension, or renal disease.
  • Medication that requires prescription.
  • Pregnant or breastfeeding.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Dragon fruit product	Dragon fruit product	A dragon fruit beverage

Primary Outcome Measures

Name	Time	Method
Blood glucose response	2 hours	Blood glucose in venous blood sample
Blood pressure	15 minutes	Systolic and diastolic blood pressure

Secondary Outcome Measures

Name	Time	Method
Plasma insulin response	2 hours	Insulin response in fingerprick blood sample
HbA1C	5 minutes	Glycated hemoglobin
C-reactive protein	5 minutes	C-reactive protein

Trial Locations

Locations (1)

Oxford Brookes Centre for Nutrition and Health; 🇬🇧 Oxford, United Kingdom