Acute effect of nut consumption on plasma total polyphenols, antioxidant capacity and lipid peroxidation

Torabian, Setareh; Haddad, Ella; Rajaram, Sujatha; Banta, J.; Sabaté, Joan

doi:10.1111/j.1365-277x.2008.00923.x

Cited by 120 publications

(87 citation statements)

References 46 publications

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“…On the other hand, we observed that the TMD þ Nuts group presented higher plasma TAC compared to control group levels as reported in previous studies (Torabian et al, 2009). However, the supplementation with nuts is not equally effective to increase antioxidant capacity as compared to VOO.…”

Section: Discussionsupporting

confidence: 47%

A 3 years follow-up of a Mediterranean diet rich in virgin olive oil is associated with high plasma antioxidant capacity and reduced body weight gain

et al. 2009

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Section: Discussionsupporting

confidence: 47%

A 3 years follow-up of a Mediterranean diet rich in virgin olive oil is associated with high plasma antioxidant capacity and reduced body weight gain

et al. 2009

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“…Four recent studies have assessed the acute effects of meals enriched with nuts on postprandial oxidation in comparison with nut-free meals [99,103,104,105]. Results have again been mixed, as two studies using walnuts [103] and almonds [104] had no discernible effect on oxidation biomarkers, while one study with almonds [99] and another study examining both almond and walnut meals [105] showed beneficial effects on postprandial oxidative stress.…”

Section: Nut Feeding Trials With Outcomes On Cardiovascular Risk Fmentioning

confidence: 99%

“…Results have again been mixed, as two studies using walnuts [103] and almonds [104] had no discernible effect on oxidation biomarkers, while one study with almonds [99] and another study examining both almond and walnut meals [105] showed beneficial effects on postprandial oxidative stress.…”

Section: Nut Feeding Trials With Outcomes On Cardiovascular Risk Fmentioning

confidence: 99%

Health Benefits of Nut Consumption

2010

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Nuts (tree nuts and peanuts) are nutrient dense foods with complex matrices rich in unsaturated fatty and other bioactive compounds: high-quality vegetable protein, fiber, minerals, tocopherols, phytosterols, and phenolic compounds. By virtue of their unique composition, nuts are likely to beneficially impact health outcomes. Epidemiologic studies have associated nut consumption with a reduced incidence of coronary heart disease and gallstones in both genders and diabetes in women. Limited evidence also suggests beneficial effects on hypertension, cancer, and inflammation. Interventional studies consistently show that nut intake has a cholesterol-lowering effect, even in the context of healthy diets, and there is emerging evidence of beneficial effects on oxidative stress, inflammation, and vascular reactivity. Blood pressure, visceral adiposity and the metabolic syndrome also appear to be positively influenced by nut consumption. Thus it is clear that nuts have a beneficial impact on many cardiovascular risk factors. Contrary to expectations, epidemiologic studies and clinical trials suggest that regular nut consumption is unlikely to contribute to obesity and may even help in weight loss. Safety concerns are limited to the infrequent occurrence of nut allergy in children. In conclusion, nuts are nutrient rich foods with wide-ranging cardiovascular and metabolic benefits, which can be readily incorporated into healthy diets.

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“…However, when the rooibos extract and RPO were fed together, the combination resulted in a significant increase in plasma total polyphenol and plasma TAC measured only as TEAC. Some studies in humans have shown that the plasma total polyphenol content parallels the plasma TAC after the intake of polyphenol-rich diets (Henning et al, 2004;Torabian et al, 2009;Wang et al, 2012), suggesting that phenolic compounds are the major contributors to the plasma TAC, a fact that we also suspected may be true in animals. The TEAC assay is based on the inhibition of the absorbance of the ABTS radical cation (ABTS •+ ) by antioxidants.…”

Section: Discussionmentioning

confidence: 90%

Hepatic, renal and endogenous antioxidant status modulatory effects of chronic co-supplementation of rooibos (<i>Aspalathus linearis</i>) and red palm oil (<i>Elaeis guineensis</i>) in male Wistar rats

Ajuwon

Oguntibeju

Marnewick

2016

Afr. J. Trad. Compl. Alt. Med.

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Background: This study investigated the hepatic, renal and endogenous antioxidant status modulatory effects of chronic cosupplementation of rooibos and red palm oil (RPO) in male Wistar rats. Materials and Methods: Rats were randomized into four groups (n=10/group) and fed daily either standard rat chow (SRC) and water (Group I), SRC and the aqueous rooibos extract (2% w/v; Group II), SRC and RPO (200 µL/day) with water (Group III), or SRC and RPO (200 µL/day) with rooibos (2% w/v; Group IV) for 22 weeks. Results: Chronic feeding of rooibos, RPO or their combination did not induce any adverse hepatic or renal effects, as shown by serum levels of alkaline phosphatase, alanine-and aspartate aminotransferase, lactate dehydrogenase, albumin, creatinine, blood urea nitrogen and uric acid. Histopathology analyses showed that liver from the three supplementation groups displayed normal hepatic histoarchitecture. Chronic feeding of RPO did not influence the redox status in the blood and liver significantly. Supplementation of rooibos alone for 22 weeks significantly (P<0.05) increased the reduced glutathione (GSH) level, GSH/GSSG ratio and catalase (CAT) activity in the liver. Co-supplementation of rooibos and RPO significantly (P<0.05) increased plasma total polyphenol content, trolox equivalent antioxidant capacity (TEAC), as well as blood GSH and GSH/GSSG ratio. Plasma conjugated dienes (CD) and hepatic malondialdehyde (MDA) levels were reduced significantly by the combination treatment, which also increased significantly the activity of CAT, glutathione reductase (GR), as well as the GSH/GSSG ratio in the liver. Conclusion: Our results suggest that chronic feeding of an aqueous fermented rooibos extract alone or in combination with RPO modulate the endogenous antioxidant system in rats. This modulation could be indicative of a threshold effect and/or an additive effect indicating a positive interaction between the bioactive components in the rooibos and RPO; however future studies are needed to elucidate the nature and specific mechanisms involved. Also, the health status of the individual/experimental animal should be considered before antioxidant supplementation, as it is suggested to affect the outcome.

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Acute effect of nut consumption on plasma total polyphenols, antioxidant capacity and lipid peroxidation

Abstract: Consumption of both nuts increased plasma polyphenol concentrations, increased the total antioxidant capacity and reduced plasma lipid peroxidation.

Cited by 120 publications

References 46 publications

A 3 years follow-up of a Mediterranean diet rich in virgin olive oil is associated with high plasma antioxidant capacity and reduced body weight gain

A 3 years follow-up of a Mediterranean diet rich in virgin olive oil is associated with high plasma antioxidant capacity and reduced body weight gain

Health Benefits of Nut Consumption

Hepatic, renal and endogenous antioxidant status modulatory effects of chronic co-supplementation of rooibos (<i>Aspalathus linearis</i>) and red palm oil (<i>Elaeis guineensis</i>) in male Wistar rats

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