Effect of In Vitro Gastrointestinal Digestion on Amino Acids, Polyphenols and Antioxidant Capacity of Tamarillo Yoghurts
| aut.relation.endpage | 2526 | |
| aut.relation.issue | 5 | en_NZ |
| aut.relation.journal | International Journal of Molecular Sciences | en_NZ |
| aut.relation.startpage | 2526 | |
| aut.relation.volume | 23 | en_NZ |
| dark.contributor.author | Diep, TT | en_NZ |
| dark.contributor.author | Yoo, MJY | en_NZ |
| dark.contributor.author | Rush, E | en_NZ |
| dc.date.accessioned | 2022-02-28T03:10:34Z | |
| dc.date.available | 2022-02-28T03:10:34Z | |
| dc.description.abstract | Laird’s Large tamarillo powder is high in protein (10%) essential amino acids (EAAs), gamma-aminobutyric acid (GABA) and polyphenols (0.6% phenolics plus anthocyanins) and fibre 25%. This study aimed to investigate, using a standardized static in vitro digestion model, the stability of amino acids and antioxidant capacity of polyphenols in yoghurt fortified with 5, 10 and 15% tamarillo powder either before (PRE) or after (POS) fermentation. Compared to plain yoghurt, the fruit polyphenols (rutinosides and glycosides) were retained and substantial increases in FEAAs (free essential amino acids), total phenolic content (TPC) and antioxidant activity were observed particularly at the end of intestinal phase of digestion. Together with SDS-PAGE results, peptides and proteins in tamarillo yoghurts were more easily digested and therefore may be better absorbed in the small intestine compared to the control. TPC and antioxidant activity of fortified yoghurts increased significantly after in vitro digestion. Relatively high bioaccessibilty of chlorogenic acid and kaempferol-3-rutinoside in digested PRE samples was observed. The results suggest that the yoghurt matrix might protect some compounds from degradation, increasing bioaccessibility and in the small intestine allow increased absorption and utilization possible. Fortification would deliver intact polyphenols and fibre to the large intestine and improve gut health. Further research of acceptability, shelf life, and then trials for health effects should be implemented. | en_NZ |
| dc.identifier.citation | International Journal of Molecular Sciences, 23(5), 2526. https://doi.org/10.3390/ijms23052526 | |
| dc.identifier.doi | 10.3390/ijms23052526 | en_NZ |
| dc.identifier.issn | 1422-0067 | en_NZ |
| dc.identifier.uri | https://hdl.handle.net/10292/14948 | |
| dc.language | en | en_NZ |
| dc.publisher | MDPI AG | en_NZ |
| dc.relation.uri | https://www.mdpi.com/1422-0067/23/5/2526 | |
| dc.rights | © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). | |
| dc.rights.accessrights | OpenAccess | en_NZ |
| dc.subject | Tamarillo; Yoghurt; Fermentation; In vitro digestion; Amino acids; Polyphenols; Antioxidant activity | |
| dc.title | Effect of In Vitro Gastrointestinal Digestion on Amino Acids, Polyphenols and Antioxidant Capacity of Tamarillo Yoghurts | en_NZ |
| dc.type | Journal Article | |
| pubs.elements-id | 449569 | |
| pubs.organisational-data | /AUT | |
| pubs.organisational-data | /AUT/Faculty of Health & Environmental Science | |
| pubs.organisational-data | /AUT/Faculty of Health & Environmental Science/School of Science | |
| pubs.organisational-data | /AUT/Faculty of Health & Environmental Science/School of Science/Food Science & Microbiology Department | |
| pubs.organisational-data | /AUT/Faculty of Health & Environmental Science/School of Sport & Recreation | |
| pubs.organisational-data | /AUT/Faculty of Health & Environmental Science/School of Sport & Recreation/Physical Activity, Nutrition & the Outdoors Department | |
| pubs.organisational-data | /AUT/PBRF | |
| pubs.organisational-data | /AUT/PBRF/PBRF Health and Environmental Sciences | |
| pubs.organisational-data | /AUT/PBRF/PBRF Health and Environmental Sciences/HA Science 2018 PBRF | |
| pubs.organisational-data | /AUT/PBRF/PBRF Health and Environmental Sciences/HS Sports & Recreation 2018 PBRF |