Postprandial Responses to Hydroxytyrosol-enriched Bread

Harokopio University

Status: Completed

Conditions: Postprandial Responses

Treatments: Other: Enriched wheat bread

Study type: Interventional

Funder types: Other

Identifiers

NCT04725955

Harokopio_Hydroxytyrosol

Details and patient eligibility

About

The amelioration of postprandial glucose and insulin responses to bread is of great importance since it may have significant beneficial effects on health. A number of studies have shown that hydroxytyrosol may have positive metabolic effects. However, this compound presents high hydrophilicity which constitutes the major barrier to its potential application in foods. Microencapsulation arises as a technological strategy to protect it and increase its stability. Alpha-cyclodextrin besides being a great carrier molecule, seems to also be beneficial to postprandial glucose levels. Enrichment of bread with encapsulated hydroxytyrosol could examine potential postprandial benefits.

Ten healthy normoglycemic subjects will participate in the study and will be provided with either a solution of glucose (reference food) or white wheat bread or wheat bread enriched with a-cyclodextrin or wheat bread enriched with hydroxytyrosol encapsulated in a-cyclodextrin, with 1-week intervals in amounts that yielded 50 g of available carbohydrates. Venous blood samples will be collected before consumption and at 30, 45, 60, 90, 120 and 180 min postprandially. Postprandial glucose, insulin and appetite-related hormone responses as well as glycemic index (GI) and subjective appetite ratings will be evaluated.

Enrollment: 10 patients

Sex: All

Ages: 18 to 40 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Normal body mass index
• Stable body weight for at least 3 months before enrollment
• Normal exercise, eating and drinking habits

Exclusion criteria

• Pregnancy and lactation
• Chronic medical illness (diabetes mellitus, cardiovascular disease, chronic liver, kidney, polycystic ovary syndrome or untreated thyroid disease)
• Use of nutritional supplements
• History of drug and/or alcohol abuse
• Psychiatric disease

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Single Blind

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10 participants in 4 patient groups, including a placebo group

Glucose Solution

Placebo Comparator group

Treatment:

Other: Enriched wheat bread

Wheat bread enriched with a-cyclodextrin

Active Comparator group

Treatment:

Other: Enriched wheat bread

Wheat bread enriched with hydroxytyrosol encapsulated in a-cyclodextrin

Experimental group

Treatment:

Other: Enriched wheat bread

White wheat bread

Placebo Comparator group

Treatment:

Other: Enriched wheat bread