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Strawberry tree fruit (Arbutus unedo L.) and 3D printing – Development of an innovative functional food product

Strawberry tree fruit (Arbutus unedo L.) is an excellent source material for the production of functional foods. This is because of the valuable bioactive compounds abundant in this fruit, which are believed to have many health benefits. Therefore, the aim of this study was to investigate the possibility of using strawberry tree fruit in the production of 3D printed snacks through additive manufacturing. The influence of two different 3D printing (3DP) programs as well as the type (corn vs. wheat) and the level of added starch carrier (4, 6 and 8%) were analyzed. All samples were analyzed for water activity (aw), pH, mass fraction of bioactive compounds, pigments, and antioxidant capacity. The type of starch carrier had a statistically significant effect on aw, pH, total phenolic compounds, hydroxycinnamic acids, flavonols, monomeric anthocyanins, condensed tannins, total carotenoids, and antioxidant activity of the 3D- printed samples. The lower level of starch carrier (4 vs. 6 and 8%) had a positive effect on the stability of the analyzed bioactive compounds, pigments and antioxidant capacity. The type of 3DP program had a statistically significant effect on the mass fraction of flavonols, chlorophyll a and b, total carotenoids and on the antioxidant activity of the 3D printed samples. In conclusion, 3DP technology can be considered as promising in the field of development of innovative and functional strawberry tree fruit-based products.

functional food ; strawberry tree fruit ; 3D printing ; starch type ; bioactive compounds

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