CarbHealth

Carbohydrates are the main energy source in most European diets. Their metabolic effects depend on several aspects ranging from chemical structure to food matrix and food processing which are best captured by the combined consideration of dietary fiber, whole grain, glycemic index or load, and dietary sugar. In Northern and Central European diets, bread is a major carbohydrate source, however, beneficial metabolic effects of bread may be confined to bread rich in fiber, whole grain and/or with a low glycemic index (GI) only.

The consortium consisting of 5 partners from Germany, Sweden and Norway will investigate the glycemic effects of bread, and the effects of whole grain consumption on body weight and diabetes risk in adults and in children, in order to achieve the main objectives of the consortium. These are:  

1. the generation of novel evidence on the relevance of bread intake for glycemic control and weight management among vulnerable populations
2. to explore and clarify potential mechanisms and relations of bread intake with glycemic control and weight management
3. to contribute to a healthy environment by exemplified advances in the infrastructure from food production to consumers
4. to establish sustainable scientific networks

These objectives will be reached by

• a randomized multicenter study on the glycemic effects of bread with added beta-glucan. The bread will be specifically produced for this study.
• analysis of biomarkers of whole grain consumption in cohorts of adults (HUSK Norway) and children (Life Child, Leipzig)
• analysis of whole grain intake (dietary intake data and biomarker data) and its association with body weight and diabetes in adults and children
• Meta-analyses on the glycemic effects of breads with and without functional ingredient, and the effects of bread consumption on weight change
• collaboration among food producers, food scientists, nutritionists, and health personal
• establishing a network of early career scientists and senior scientists in the consortium

Results are expected towards the end of the funding period. It is expected that the results will be used to refine and elaborate dietary guidelines, for example in the 'Nordic Nutrition Recommendations (which are currently updated), and the D-A-CH dietary recommendations for the German speaking countries. Whole grain consumption is below the recommendations in large parts of the population. In addition, there is a great need for more specific data on the health effects of whole grain consumption. The results of the consortium and especially the clinical trial will provide the scientific basis for the development of breads with functional ingredients that fulfill EFSA health claims. On the long term, we expect to develop high fiber breads with high consumer acceptability which may increase whole grain and fiber intake.