Phenolic contents and in vitro antioxidant activity of four commonly consumed nuts in algeria

Abstract

This study was carried out to determine the phenolic contents and the antioxidant activity of four nuts with different solvent extract. Total phenolic compounds, flavonoids, and proanthocyanidin were quantified. Antioxidant activity was evaluated by various in vitro tests, including ferric reducing power, phosphomolybdenum method assay, and free radical scavenging activity. The results showed that the total phenolic contents varied between 0.30 g GAE/100 g (peanuts) and 1.65 g GAE/100 g (walnuts); the fl avonoid contents varied between 0.17 g QE/100 g (peanuts) and 0.41 g QE/100 g (hazelnut). The phenolic contents of four nut extracts exhibit potent antioxidant activity. Indeed, walnuts were the richest in total phenolic content and demonstrated the highest potential for overall antioxidant capacity using ferric reducing power assay (FRP), phosphomolybdenum method assay, and free radical scavenging activity (FRSA). Phenolic amounts positively correlated with antioxidant activity tested.

Influence of climate variation on phenolic composition and antioxidant capacity of Medicago minima populations

“…Our results suggest the presence of a significant positive correlation between antioxidant capacity in M. minima leaves and roots and their phenolic and flavonoid contents. The same results have been reported in nut extracts 16 , tealeaf extracts 42 and berry extracts of Hippophae rhamnoides 43 . However, there was no correlation between M. minima seed extracts and their high antioxidant capacity, similar to findings for other plant extracts [44][45][46] .…”

“…Phenolic acids and flavonoids are widely distributed in nature and can be isolated from vegetables, herbs and fruits. Due to their therapeutic potential, phenolic compounds have received considerable attention in scientific research [14][15][16][17][18] . In fact, scientific experiments support their beneficial role in bodily health [14][15][16][17][18] .…”

“…Due to their therapeutic potential, phenolic compounds have received considerable attention in scientific research [14][15][16][17][18] . In fact, scientific experiments support their beneficial role in bodily health [14][15][16][17][18] . Recent studies have reported that many biological activities are linked to the presence of phenolic compounds, which act as free radical scavengers and/or metal chelators [15][16][17] .…”

“…In fact, scientific experiments support their beneficial role in bodily health [14][15][16][17][18] . Recent studies have reported that many biological activities are linked to the presence of phenolic compounds, which act as free radical scavengers and/or metal chelators [15][16][17] . Some studies have reported that luteolin (flavone) induces apoptosis in cancer cells 19 , but it is already used mostly for treating cardiovascular diseases, relieving cough and eliminating phlegm 18 .…”

Oxidative Stress Biomarkers, Nut-Related Antioxidants, and Cardiovascular Disease

“…Nutrients show antioxidant activities, especially vitamin E and phenolic compounds [9], with nuts standing out as a source of both [10]. In vitro studies [11][12][13][14][15][16][17][18], animal models [19][20][21][22][23][24], observational studies [25], and randomized trials [26][27][28][29][30][31][32] suggest the potential benefit of including different nuts in the diet to improve biomarkers of oxidative stress.…”