The effects of grape seed extract (<scp><i>Vitis vinifera</i></scp>) supplement on inflammatory markers, neuropeptide Y, anthropometric measures, and appetite in obese or overweight individuals: A randomized clinical trial

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Grape seed extract (GSE) is a flavonoid‐rich supplement, recently discussed as a potential moderator of inflammation and obesity. In this study, we aimed to investigate the effects of GSE supplementation along with a restricted‐calorie diet (RCD), on changes in blood lipid profile, visceral adiposity index (VAI), and atherogenic index of plasma (AIP). We designed a randomized, double‐blinded, placebo‐controlled clinical trial. Forty obese or overweight individuals (25 ≤ body mass index < 40 kg/m2) were randomly assigned to receive GSE (300 mg/day) or placebo, plus RCD, for 12 weeks. We studied the anthropometric measures, biochemical biomarkers and dietary intake within the study timelines. Levels of high‐density lipoprotein cholesterol (HDL‐C) and HDL‐C/low‐density lipoprotein cholesterol (LDL‐C) significantly increased in the GSE group as compared with the placebo group at week 12 (p = .03 and .008, respectively, adjusted for age, sex, energy and saturated fatty acid intake). We also observed a significant reduction in LDL‐C following GSE supplementation in comparison to placebo (adjusted for age, sex and energy intake, p = .04). VAI, AIP, total cholesterol and triglyceride significantly decreased in the GSE group compared with the baseline (p = .04, .02, .01, and .02, respectively). GSE supplementation may have a modulatory role in improving blood lipid profile in obese or overweight individuals, when accompanied by RCD.

Section: Resultsmentioning

confidence: 99%

“…Written informed consent was also obtained from the participants for experimentation. All the details have been published elsewhere (Parandoosh et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Grape seed extract supplementation along with a restricted‐calorie diet improves cardiovascular risk factors in obese or overweight adult individuals: A randomized, placebo‐controlled trial

Yousefi

Parandoosh

Khorsandi

et al. 2020

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“…A trained dietitian performed the block randomization with a block size of four and possible balanced combinations with two P (placebo) and two S (sumac) subjects, calculated as six blocks (PPSS, PSPS, PSSP, SPPS, SPSP, and SSPP). Then, blocks were randomly chosen, using a simple random sampling method to determine the assignment of all participants into the groups (Parandoosh et al, 2019).…”

Section: Randomizationmentioning

confidence: 99%

The beneficial effects of sumac (Rhus coriaria L.) supplementation along with restricted calorie diet on anthropometric indices, oxidative stress, and inflammation in overweight or obese women with depression: A randomized clinical trial

Hariri

Ghahroudi

Jahangiri³

et al. 2020

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Background: Oxidative stress and inflammation play pivotal roles in the pathophysiology of obesity and depression. This study aimed to evaluate the effects of sumac (Rhus coriaria L.) on anthropometric indices, oxidative stress, inflammation, and depression in overweight or obese depressed women. Methods: This randomized, double-blind, placebo-controlled clinical trial was conducted on overweight or obese women aged 20-65 years with mild to moderate depression. The participants (n = 62) were assigned to receive a restricted calorie diet (RCD) plus 3 g/day of either sumac or placebo for 12 weeks. Anthropometric measurements, biochemical biomarkers, and the Beck depression inventory were assessed during the study. Results: Sumac significantly reduced weight, body mass index, body fat (p < .001), visceral fat level (p = .03), waist and hip circumference, and malondialdehyde levels (p = .03, p = .002, and p = .006, respectively) in comparison with the placebo group. The levels of interleukin-6 and tumor necrosis factor-α decreased only in the sumac group (11 and 32%, respectively); however, these reductions were not significant. The high-sensitivity c-reactive protein levels (p = .007 and p = .01, respectively) and Beck scores (p < .001) decreased significantly in both the sumac and the placebo group without any significant difference between the two groups. Conclusion: Sumac can be considered as a functional food that along with RCD could have beneficial effects on obesity management, through the possible modulatory effects on oxidative stress in overweight or obese depressed women.

Effects of grape products on inflammation and oxidative stress: A systematic review and meta‐analysis of randomized controlled trials

Ghalishourani

Farzollahpour

Shirinbakhshmasoleh

et al. 2021

This systematic review and meta‐analysis of randomized controlled trials (RCTs) were conducted to determine the effects of grapes and grape products on inflammation and oxidative stress among adults. PubMed, Scopus, ISI Web of Science, and Cochrane Library databases were searched up to July 2020 to identify RCTs investigating the effects of grape and grape products on inflammatory and oxidative stress markers. Weighted mean differences (WMD) were pooled using a random‐effects model. Of the 8,962 identified studies, 24 RCTs (27 arms) were included in the statistical analysis. Grape products significantly reduced serum C‐reactive protein (CRP) levels (WMD: −0.35 mg/L; 95% CI: −0.62, −0.09, p = .008), but they had no significant effect on serum tumor necrosis factor‐alpha (TNF‐α) (WMD = −1.08 pg/ml; 95% CI: −2.29, 0.11, p = .07), interleukin‐6 (IL‐6) (WMD = 0.13 pg/ml; 95% CI: −0.35, 0.60, p = .60), total antioxidant capacity (TAC) (WMD = 0.15; 95% CI: −0.35, 0.65, p = .54), or malondialdehyde (MDA) (WMD = 0.14; 95% CI: −0.64, 0.92, p = .72). The analysis indicated possible decreasing effects of grapes and grape products on CRP, but they might not be able to change IL‐6, TNF‐α, TAC, and MDA concentrations. Nonetheless, further studies are warranted before definitive conclusions may be reached.