Underutilized Rosa canina Herbal Dust as an Innovative Natural Functional and Health Promoting Ingredient: A Proposal of Two-Novel Approaches

Purpose Fruit crops by-products and waste have been a particular object of new fortified products creation, especially of the food and pharmaceutical industry. In this research, new approaches for valorization of Rosa canina herbal dust (industrial waste from filter tea production) and its functional ingredients were proposed. Methods In the first approach supercritical carbon dioxide extraction (SFE-CO2) of R. canina herbal dust in the pressure range of 10-30 MPa was applied to produce the plant extracts. The second approach analyzed the possibility of R. canina herbal dust direct application in the production of fortified food products where, as a case study, application in the production of functional bread was evaluated. The impact of herbal dust addition has been determined based upon the bread quality, including evaluation of nutritional value, specific volume, crumb grain quality and crumb elasticity. Results In the SFE-CO2, EYs ranged from 0.6 to 9.68%, being the highest at 30 MPa after 5 h of the process. Chemical characterization of the extracts was carried out by gas chromatography coupled to mass spectrometry allowing the identification of hydrocarbons, sterols, and tocopherols. Among the valuable volatile compounds, gamma-sitosterol (34.93%), gamma-tocopherol (8.25%), and alpha-tocopherol (7.33%) were the most abundant. The results of the investigation of the influence of R. canina herbal dust on the rheological properties of the dough, quality and nutritional value of bread confirmed the justification of the application of this by-product in baking. Conclusion The obtained information on the extraction process and on the quality of the enriched R. canina herbal dust product, can serve as a basis for the development of industrial applications targeting the valorization of highly underused R. canina herbal dust. [GRAPHICS] .

Automated summary

Fruit crop by-products and waste have become a focus for creating new fortified products, especially in the food and pharmaceutical industry. This research proposed new approaches for utilizing Rosa canina herbal dust and its functional ingredients, highlighting the potential for industrial applications in baking.