Investigating the Antioxidant Properties of Some Herbal Infusions During In Vitro Digestion

Year 2022, Volume: 5 Issue: 1, 1 - 13, 30.06.2022

Gülay Özkan , Aliye Aras , Esra Çapanoğlu Güven

https://doi.org/10.35206/jan.1106268

Cited By: 5

Abstract

In the present study, the content and antioxidant potential of phenolic compounds from five herbal infusions including Aspalathus linearis, Sambucus nigra, Rhamnus frangula, Plantago lanceolata and Equisetum arvense were analyzed. Additionally, simulated in vitro gastrointestinal digestion were conducted to predict the bioaccessibility of infusion phenolics. Accordingly, Rooibos infusion had the highest total phenolic (2191.18±93.39 mg GAE/100 g dw) and flavonoid content (1226.14±93.07 mg CE/100 g dw) as well as antioxidant capacity measured by CUPRAC (3124.12 mg TE/100 g dw) and FRAP (2634.95 mg TE/100 g dw) assays. On the other hand, the highest ABTS (2351 mg TE/100 g dw) and DPPH (475.19 mg TE/100 g dw) antioxidant capacity values were recorded for elderflower infusion. Based on the gastrointestinal digestion, retention of phenolics in the infusions was found to be variable througout mouth to intestine. It can be deduced from the results that those herbs can be considered as a valuable beverage alternatives with their high nutritional value.

Keywords

Herbal infusions, Antioxidant capacity, Bioaccessibility, Phenolic compounds

Bazı Bitkisel İnfüzyonların In Vitro Sindirim Sırasında Antioksidan Özelliklerinin İncelenmesi

Abstract

Bu çalışmada, Aspalathus linearis, Sambucus nigra, Rhamnus frangula, Plantago lanceolata ve Equisetum arvense olmak üzere beş bitkisel infüzyonun fenolik içeriği ile antioksidan potansiyeli analiz edilmiştir. Ayrıca, infüzyonlarda bulunan fenolik bileşiklerin biyoerişilebilirliklerini belirlemek amacıyla simüle edilmiş in vitro gastrointestinal sindirim gerçekleştirilmiştir. Sonuçlara göre, Rooibos infüzyonunun en yüksek toplam fenolik (2191.18±93.39 mg GAE/100 g ka), toplam flavonoid (1226.14±93.07 mg CE/100 g ka) ve antioksidan kapasiteye (CUPRAC, 3124.12 mg TE/100 g ka; FRAP, 2634.95 mg TE/100 g ka) sahip olduğu bulunmuştur. Diğer yandan, en yüksek ABTS (2351 mg TE/100 g ka) ve DPPH (475.19 mg TE/100 g ka) antioksidan kapasite değerleri mürver çiçeği infüzyonu ile elde edilmiştir. Gastrointestinal sindirim sonuçlarına göre, infüzyonlarda bulunan fenoliklerin elde edilme oranının ağızdan bağırsağa değişken olduğu bulunmuştur. Çalışmada elde edilen sonuçlara göre, bu bitkilerin yüksek besinsel içerikleri nedeniyle değerli bir içecek alternatifi olduğu sonucuna varılabilmektedir.

Keywords

Bitkisel infüzyonlar, Antioksidan kapasite, Biyoerişilebilirlik, Fenolik bileşikler

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