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dc.contributor.authorBescos Garcia, Raul
dc.contributor.authorRollason, ML
dc.contributor.authorDavies, TS
dc.contributor.authorCasas-Agustench, P
dc.descriptionFile replaced (docx to pdf) on 25.7.23 by NK (LDS)

Popularity of beetroot juice (BJ) is growing due to its high inorganic nitrate content (NO₃) and its potential physiological benefits. However, the content of NO₃ is not indicated in most commercial BJs and it can be affected by seasonal changes and storage conditions. This study analyzed the content of NO₃ and nitrite (NO₂) in five and two commercial and self-made BJs, respectively, that were purchased in the summer and winter periods. The effect of storage temperature (20°C, 4°C, and −20°C) and pH was also analyzed. In nonconcentrated BJs, the NO₃ content was 34 ± 20% (p = .075) in the winter than in the summer. NO₃ was fully degraded in self-made BJ after 3 days at 20°C. This effect was attenuated by 78% and 82% when it was kept at 4°C and −20°C, respectively. The addition of lemon juice (5%) to self-made BJ was another useful approach to avoid NO₃ degradation for 3 days when it was kept at 20°C. Regarding NO₂, self-made BJ had higher concentration (0.097 ± 0.01 mg/mL) compared to commercial BJs (<0.1 mg/mL; p = .001). The pH of self-made BJ was higher (6.3 ± 0.1) compared to commercial BJs (4.5 ± 0.3; p = .001). These results suggest that the content of NO₃ in nonconcentrated BJs can substantially differ across the year and this is an important factor to take into account when recommending BJs to promote some of its potential physiological benefits.

dc.publisherWiley Open Access
dc.subjectnitric oxide
dc.titleContent of nitrate and nitrite in commercial and self-made beetroot juices and the effect of storage temperature
dc.typeJournal Article
plymouth.publication-statusPublished online
plymouth.journalFood Science and Nutrition
plymouth.organisational-group|Plymouth|Research Groups
plymouth.organisational-group|Plymouth|Faculty of Health
plymouth.organisational-group|Plymouth|Faculty of Health|School of Health Professions
plymouth.organisational-group|Plymouth|Research Groups|Institute of Health and Community
plymouth.organisational-group|Plymouth|REF 2021 Researchers by UoA
plymouth.organisational-group|Plymouth|Users by role
plymouth.organisational-group|Plymouth|Users by role|Academics
plymouth.organisational-group|Plymouth|REF 2021 Researchers by UoA|UoA03 Allied Health Professions, Dentistry, Nursing and Pharmacy
plymouth.organisational-group|Plymouth|Research Groups|Plymouth Institute of Health and Care Research (PIHR)

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