About this trial
Bread remains one of the most widely consumed staple foods worldwide, with wheat flour serving as its traditional foundation. However, the widespread dependence on refined wheat-based bread has paralleled the rising prevalence of type 2 diabetes (T2D), partly owing to its high glycaemic index (GI), which results in rapid increases in blood glucose levels. Enhancing the nutritional quality of bread, therefore, represents an important target for dietary intervention.
Developing alternative flour blends for bread production presents a potential strategy for improving glycaemic control and supporting glucose homeostasis. Accordingly, this clinical trial aims to determine whether the partial replacement of wheat flour with legume flours, including chickpea, pea, and lentil, in Arabic bread formulations can lower glycaemic responses compared with traditional Arabic wheat bread.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Participants will be adults living with overweight or obesity (Body Mass Index [BMI] > 25 kg/m²).
Participants will be of any gender.
Participants will be aged 18 to 65.
Participants will be from any sociodemographic background.
Disqualifiers
Those with food allergies or intolerances to any of the study ingredients, including wheat, chickpeas, lentils, or peas, will not be eligible.
Individuals with a known diagnosis of metabolic or chronic health conditions, such as diabetes, insulin resistance, hypertension, or phenylketonuria, will be excluded due to the potential impact on glycaemic control and study outcomes.
Participants with a fasting blood glucose level of above 7.0 mmol/L.
Use of medications that influence blood glucose levels (e.g., corticosteroids, antipsychotics, antiviral protease inhibitors) or substances that interfere with digestion and absorption (such as laxatives or fibre supplements) will result in exclusion.
Trial design
Crossover
Treatments tested in this trial
Control Bread
Other interventionArabic bread prepared with 100% wheat flour, providing an equivalent of 50g of available carbohydrate.
Chickpea-Enriched Arabic Bread
Other interventionArabic bread prepared with 30% chickpea flour and 70% wheat flour, providing an equivalent of 50g available carbohydrate. (This is the primary experimental comparison)
Pea-Enriched Arabic Bread
Other interventionArabic bread prepared with 30% pea flour and 70% wheat flour, providing an equivalent of 50g available carbohydrate. (Optional secondary comparison)
Lentil-Enriched Arabic Bread
Other interventionArabic bread prepared with 30% lentil flour and 70% wheat flour, providing an equivalent of 50g available carbohydrate. (Optional secondary comparison)
Treatment groups
Trial outcomes
Primary outcomes
Postprandial Blood Glucose Response
Differences in the iAUC for capillary blood glucose will be compared between bread formulations.
Secondary outcomes
Peak Postprandial Capillary Blood Glucose
Differences in the peak capillary blood glucose value after consuming each bread formulation.
Appetite Response
Appetite sensations (hunger, fullness, desire to eat sweet foods, desire to eat salty foods, desire to eat fatty foods, and desire to eat savoury foods) will be assessed using a 100-mm Visual Analogue Scale (VAS). Scores range from 0 to 100 mm. Higher scores indicate greater intensity of the appetite sensation being measured (e.g., greater hunger, fullness, or desire to eat).
Sensory Acceptability
Sensory acceptability of each Arabic bread sample will be assessed using a 9-Point Hedonic Scale. Scores range from 1 to 9, with higher scores indicating greater liking and sensory acceptability across sensory attributes, including overall liking, colour, aroma, flavour, texture, chewability, roundness, and crumb characteristics.
24 hour food intake
Total energy intake, macronutrient intake until midnight after product consumption.
Sponsors and contacts
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