Review Article

The Effects of Grape/Grape Products on Inflammatory and Oxidative Stress Markers: Systematic Review and Meta-Analysis of Randomized Controlled Trials

Table 1

Characteristics of eligible randomized controlled trials that investigated the effect of the grape and its products on inflammatory and oxidative stress biomarkers in adults.

Author (year)CountrySample size/sexMean age intervention/controlDuration (week)/study designPopulation characteristicsType of intervention (gr/day)Intervention in placebo group (gr/day)Outcomes

Amoutzopoulo et al. (2013) [33]Turkey89 (high hardaliye: 39 Low hardaliye: 33 C: 17)/bothHigh hardaliye: 37.44
Low hardaliye: 32.79
C: 34.18
6/PHealthy adultsHigh hardaliye (500)/Low hardaliye (250)Not receiving intervention↔TAC
↓MDA

Bardagjy et al. (2018) [16]USA20 (I: 20, C: 20)/both48.64/CHealthy obeseFreeze-dried whole grape powder (60)Placebo↔CRP
↔IL-6
↔MCP-1
↔ox-LDL ↔TNF-a

Barona et al. (2012) [34]USA24 (I: 40, C: 38)/M
Dyslipidemia: 11
Nondyslipidemia: 13
Dyslipidemia: 48.1
Nondyslipidemia: 53.9
4/CMetabolic syndromeLyophilized whole grape powder (46)Macronutrient-matched placebo↔TNF-a
↔IL-6
↔IL-8
IL-10 (Dyslipidemia: ↓Non-dyslipidemia: ↑)

Castilla et al. (2006) [12]Spain38 (I: 26, C: 12)/both62/59.22/PHemodialysisConcentrated red grape juice (100)Not receiving intervention↓ ox-LDL ↑TEAC ↓MCP-1 ↔CRP

Castilla et al. (2008) [35]Spain16 (I: 8, C: 8)/bothRange: 33–79 y2/PHemodialysisConcentrated red grape juice (1000)Not receiving intervention↓ ox-LDL ↓MCP-1 ↔CRP

Corredor et al. (2016) [36]Spain39 (I :25, C: 14)/both66.16/59.7124/PHemodialysisUnfermented grape juice (100)Not receiving intervention↔CRP

Dani et al. (2020) [37]Brazil20 (I: 10, C: 10)/F68/724/PHealthy elderly womenGrape juice and exercise (400)Placebo and exercise↔TBARS
↔Carbonil
↔SOD
↔CAT
↓IL-6

De Oliveira et al. (2021) [15]Brazil19 (I: 10, C: 9)/both68.33/65.54/PParkinsonGrape juice (400) + aquatic exerciseNo grape juice + aquatic exercise↔TBARS ↔Carbonyl ↔CAT ↔GPX ↔SOD

Dohadwala et al. (2010) [38]USA59 (I: 59, C: 59)/both40/448/CPrehypertension and stage 1 hypertensionGrape juice (595)Placebo juice↔CRP

Duclos (2017) [39]USA19 (I: 19, C: 19)/both30–704/CMetabolic syndromeFreeze-dried grape powder (60)Matched placebo↔AOPPs
↔TBARS
↔TNF-a
↔MCP-1
↔IL-6

Evans et al. (2014) [40]Canada25 (I: 13, C: 12)/both46.1/386/PPrehypertensive, overweight, and/or prediabeticWhole grape extract (0.35)Microcrystalline cellulose↔TAC
↔SOD
↔ox-LDL

Goulart et al. (2020) [41]Brazil20 (I: 20, C: 20)/both17.82/CJudo athleteGrape juice (400)Placebo↔Carbonyl
↔TBARS
↑TAC
↓SOD
↔CAT

Hollis et al. (2009) [42]USA51 (I: 25, C: 26)/both22/2812/PHealthy adultsConcord grape juice (480)Not receiving intervention↔ORAC

Kaliora et al. (2016) [13]Greece44 (I: 23, C: 21)/both50.7/51.624/PNAFLD with nonsignificant fibrosisCorinthian currants (36) + dietary counselingDietary counseling↔CRP
↓IL-6
↔ox-LDL ↔TNF-a

Kanellos et al. (2013) [43]Greece48 (I: 26, C: 22)/both63.7/6324/PDiabetes (type 2)Raisin (36)Usual dietary habit↔hs-CRP ↔IL-6 ↔TNF-a ↑TAP ↔ox-LDL

Kanellos et al. (2017) [44]Greece33 (I: 20, C: 13)/both30.8/29.84/PHealthy smokersRaisin (90)Not receiving intervention↔CRP ↔MDA ↔AOPPs ↔NO

Lafay et al. (2009) [45]France20 (I: 20, C: 20)/both21.64/CElite athletesGrape extract (0.4)Maltodextrin↑ORAC
↔Ox-LDL
↔SOD
↔GPx
↔CAT

Martínez-Maqueda et al. (2018) [46]Spain48 (I: 25, C: 23)/bothRange: 20–65
Mean: 42.6
6/CMetabolic syndromeDried grape pomace (8)Not receiving intervention↔hs-CRP

Puglisi et al. (2008) [47]USA22 (I: 10, C: 12)/both57.8/556/PMen and postmenopausal womenRaisin (150) + walkWalk↔TNF-a

Rahbar et al. (2015) [48]Iran69 (Red grape: 22, White grape: 24, C: 23)/bothRed grape: 50.5
White grape: 50.6
C: 52.5
8/PHypercholesterolemic adultsCondori red grapes/Shahroodi white grape (500)5 servings of other fruits except grapes↓TBARS
↑TAC

Rankin et al. (2008) [49]USA17 (I: 17, C: 17)/both26.52/COverweightRaisin (90)Isocaloric placebo↔CRP
↔IL-6
↑ORAC

Rowe et al. (2011) [50]USA78 (I: 40, C: 38)/bothRange: 50–75
Mean: 57.9
9/PHealthy individualsConcord grape juice (260)Concord grape-flavored placebo↔ORAC

Shishehbor et al. (2021) [51]Iran38 (I: 20, C: 18)/both39.11/42.85/PHyperlipidemic patientsBlack seed raisin (90)Not receiving intervention↔hs-CRP
↑TAC
↔MDA

Tome’-Carneiro et al. (2013) [52]Spain50 (I: 25, C: 25)/both58/5952/PPatients with stable coronary
Artery disease
Grape extract (0.35)Maltodextrin↔hs-CRP
↔TNF-a
↔IL-6
↔IL-10
↔IL-6/IL-10

Toscano et al. (2017) [53]Brazil28 (I: 15, C: 13)/both42.7/36.34/PRecreational runnersGrape juice (680)Isocaloric juice↔MDA
↑TAC
↔hs-CRP

Vaisman and Niv (2015) [54]Israel45 (not mentioned separately)/both57.6/56.412/PPre- and mild hypertensionRed grape cell powder (0.4)Colored maltodextrin powder (0.2)↔CRP

Yubero et al. (2013) [55]Spain60 (I: 30, C: 30)/bothRange: 34–65
Mean: 51
8/PHealthyPolyphenol-rich pomace grape extract supplement (Eminol) (0.7)Maltodextrin↔TNF-a
↑ORAC
↔ox-LDL

Zern et al. (2005) [14]USA24 (I: 24, C: 24)/F39.74/CPremenopausal womenA lyophilized grape powder (36)Equal ratio of fructose and dextrose↔hs-CRP
↔IL-6
↓TNF-a
USA20 (I: 20, C: 20)/F58.54/CPostmenopausal womenA lyophilized grape powder (36)Equal ratio of fructose and dextrose↔hs-CRP
↔IL-6
↓TNF-a

Zunino et al. (2014) [17]USA59 (I: 24, C: 24)/bothF: 34.7/M: 37.13/CHealthy obeseFreeze-dried whole grape powder (92)Placebo↔IL-1b
↔IL-6
↔IL-8
↔TNF-a
↔CRP ↔ORAC
↔ox-LDL

High-sensitivity C-reactive protein; IL: interleukin; TNF: tumor necrosis factor; TAP: antioxidant potential; ox-LDL: oxidized low-density lipoprotein; NO: nitric oxide; MDA: malondialdehyde; AOPPs: advanced oxidation protein products; TBARS: thiobarbituric acid reactive substances; CAT: catalase; GPX: glutathione peroxidase; SOD: superoxide dismutase; TEAC: Trolox equivalent antioxidant capacity; MCP-1: monocyte chemoattractant protein-1; ORAC: oxygen radical absorbance capacity; TAC: total antioxidant capacity; F: female; P: parallel; C: crossover.