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Abstract
Abstract Colombian berry (agraz) has demonstrated a high antioxidant content in vitro. In the present study, it was elaborated and characterized an agraz nectar, designed a placebo with similar physicochemical and sensorial characteristics of the agraz nectar, but without polyphenols; and evaluated their antioxidant capacity both in vitro and in vivo in adults with cardiovascular risk factors. The polyphenolic concentration of the agraz nectar and its antioxidant capacity was superior than other reported for this fruit. A high content of total cyanidins was observed in the freeze-dried agraz, but not delphinin was detected by HPLC. For the intervention study, sixty-six subjects, with at least three cardiometabolic risk factors, consumed agraz nectar or placebo daily during 4 weeks each, separated by a 4-week washout period. Total phenol concentration and antioxidant capacity in the participants’ serum were not statistically different after consuming agraz nectar and placebo. However, women increased significantly their serum DPPH scavenging capacity after consuming agraz nectar, compared to placebo. This is one of the first studies showing data about the effects of this colombian berry on the antioxidant capacity in people with metabolic syndrome.
Highlights
Blueberries belong to the genus Vaccinium and comprise about 400 species (Camp, 1945)
It was showed that V. meridionale berries are an excellent source of dietary phytochemicals such as anthocyanins and polyphenolics, being comparable to V. myrtillus (Garzón et al, 2010) which is known by its nutraceutical properties including management of visual disorders and protection against cancer, age-related neurodegenerative conditions, and inflammatory responses (Zhao et al, 2004; Bao et al, 2008; Yao et al, 2010)
V. meridionale is considered as a promissory fruit and a functional food for its high antioxidant content in vitro (Garzón et al, 2010) and it has been included in the list of fruits with potential international market (Ligarreto, 2009), there is limited scientific information about the beneficial effects of the consumption of this colombian berry in humans
Summary
Blueberries belong to the genus Vaccinium and comprise about 400 species (Camp, 1945). It was observed that after eating V. myrtillus L. resulted in significant increases in serum/plasma antioxidant capacity and this was associated to the activity of antioxidants present in this fruit, which may slow free-radical processes (Prior et al, 2007; Harasym & Oledzki, 2014). Increases in this marker, which may be measured by different methods, could be associated to some beneficial effects of Vaccinium fruit consumption. We characterized a freeze-dried and reconstituted nectar from agraz, designed a placebo and evaluated the antioxidant capacity both in vitro and in vivo in people at high risk of cardiovascular disease
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