{"url":"https://whatshealthyandwhy.com/aronia-berry/antioxidants-cardiovascular-and-metabolic-health","path":"/aronia-berry/antioxidants-cardiovascular-and-metabolic-health","alternates":{"json":"https://whatshealthyandwhy.com/api/articles/aronia-berry/antioxidants-cardiovascular-and-metabolic-health.json","markdown":"https://whatshealthyandwhy.com/aronia-berry/antioxidants-cardiovascular-and-metabolic-health.md"},"topic":{"slug":"aronia-berry","name":"Aronia Berry","url":"https://whatshealthyandwhy.com/aronia-berry"},"slug":"antioxidants-cardiovascular-and-metabolic-health","order":1,"title":"Antioxidants, Cardiovascular Health, and Metabolic Benefits","question":"Does aronia berry lower blood pressure and cholesterol?","answer":"Aronia berry may lower blood pressure or cholesterol in some groups, but the newest meta-analysis found no clear effect overall.","description":"Aronia berry's exceptional polyphenol density, among the highest of any measured fruit, and what trials and meta-analyses actually show for blood pressure, cholesterol, blood sugar and arterial health","confidence":2,"confidenceNote":"Four reviews disagree: one found lower systolic pressure and cholesterol, a 2025 analysis of 10 trials found no effect (very low certainty), and one saw diastolic pressure rise.","evidenceSummary":{"rctCount":1,"observationalCount":0,"metaAnalysisCount":4,"totalParticipants":"660+","replicated":false,"newestStudyYear":2025},"category":{"categoryTitle":"What's Good For You","categorySlug":"good-for-you","subcategoryName":"Foods & Drinks","subcategorySlug":"foods","url":"https://whatshealthyandwhy.com/explore/good-for-you/foods"},"actions":["If you try it, studies gave aronia extract daily for 4 to 12 weeks; one used 100 mg three times a day [2][3][4].","Blend fresh or frozen berries (100–200 g) into smoothies with sweeter fruit, since raw aronia is very tart.","Keep taking any prescribed blood pressure or cholesterol medicine; aronia is no substitute, and the pooled evidence for it is of very low certainty [7]."],"cautions":["High amounts may cause mild digestive discomfort because of the high tannin content.","Results conflict: one meta-analysis found diastolic blood pressure rose by about 2.6 mmHg, and a 2025 analysis of 10 trials found no clear benefit [5][7].","Trials were small and short, and several had a high or unclear risk of bias; larger, longer trials are needed [7]."],"simpleText":"Aronia (Aronia melanocarpa), also called chokeberry, is a small dark berry native to eastern North America and now widely cultivated across Eastern Europe. It ranks among the highest-polyphenol fruits ever measured — richer in anthocyanins than blueberries, acai, or elderberry, with an ORAC antioxidant score several times higher than most commonly consumed berries [6]. Whether that lowers blood pressure or cholesterol is unsettled. Small uncontrolled studies in people with metabolic syndrome reported falls [2][3], and one meta-analysis found lower systolic pressure and total cholesterol [1], but other reviews found no effect on blood pressure, and the newest, pooling 10 randomized trials, found no significant effect on any heart or metabolic marker, with very low certainty [5][7][8]. The berries are intensely tart and astringent when eaten raw, so they are most commonly consumed as juice, extract capsules, or dried powder blended into smoothies.","mediumText":"Polyphenol Profile\n\nAronia's exceptional antioxidant capacity traces back to an unusually dense and varied polyphenol composition [6]:\n\n- Anthocyanins: 400–1480 mg per 100g fresh weight, primarily cyanidin-3-O-galactoside, cyanidin-3-O-arabinoside, and cyanidin-3-O-glucoside. These dark-blue pigments drive most of the cardiovascular and anti-inflammatory activity.\n- Proanthocyanidins: Condensed tannins responsible for aronia's extreme astringency, present at concentrations rarely seen in other fruits. These bind to and inactivate pro-inflammatory enzymes.\n- Hydroxycinnamic acids: Particularly chlorogenic acid, which slows glucose absorption and improves insulin sensitivity.\n- Quercetin and other flavonols: Present in smaller amounts but contributing additional anti-inflammatory and endothelial effects.\n\nThis combination of polyphenol classes gives aronia several plausible routes of action rather than a single pathway, which is why researchers expected broad benefits; whether they show up in people is less clear, as the sections below explain.\n\nBlood Pressure: Mixed Results\n\nBlood pressure is the most studied outcome, and the human results conflict. Studies without a placebo group in people with metabolic syndrome reported falls [2][3], but the one randomized, placebo-controlled trial among these references, in 102 middle-aged adults with high-normal blood pressure, found no change in blood pressure after 12 weeks [4]. Two mechanisms have been proposed:\n\nEndothelial nitric oxide upregulation: Polyphenols, especially anthocyanins, stimulate endothelial nitric oxide synthase (eNOS), increasing nitric oxide (NO) production in blood vessel walls. NO is the primary vasodilator — it relaxes smooth muscle and widens arteries. Aronia also reduces levels of endothelin-1, a potent vasoconstrictor, restoring the NO/endothelin balance toward vasodilation [2].\n\nOxidized LDL reduction: Much of cardiovascular disease risk stems not from total LDL but from oxidized LDL, which triggers arterial inflammation and foam cell formation. Aronia's anthocyanins and proanthocyanidins protect LDL particles from oxidation, reducing their atherogenic potential.\n\nThe meta-analyses disagree. A 2021 meta-analysis of controlled trials found that 6 to 8 weeks of aronia extract lowered systolic blood pressure, most in adults over 50 [1]. A 2019 meta-analysis of seven randomized trials found no effect on systolic pressure and a small rise in diastolic pressure [5]. A 2022 systematic review found no effect on blood pressure [8], and the largest analysis so far, 10 randomized trials with 666 participants, found no significant effect on blood pressure or any other cardiometabolic marker and rated the certainty of the evidence very low [7].\n\nCholesterol, Blood Sugar and Inflammation\n\nThe results for cholesterol and blood sugar are just as mixed.\n\nCholesterol: Hawkins and colleagues found total cholesterol fell [1]. Rahmani and colleagues found HDL rose slightly and total and LDL cholesterol fell, most clearly in trials shorter than 10 weeks [5]. A 2022 review found no effect on total or HDL cholesterol [8], and the 2025 analysis found no overall effect, with a possible fall only in people whose total cholesterol started below 200 mg/dL [7]. The proposed mechanisms are chlorogenic acid inhibiting intestinal cholesterol absorption and anthocyanins reducing hepatic cholesterol synthesis.\n\nBlood glucose and insulin: Hydroxycinnamic acids — especially chlorogenic acid — slow post-meal glucose absorption by inhibiting alpha-glucosidase, the enzyme that breaks down dietary starch. In a 4-week open-label study of people with metabolic syndrome, higher aronia extract consumption was correlated with a positive effect on glycemia [3]. A 2022 review that pooled four studies found blood glucose 0.44 mmol/L lower [8], but the 2025 analysis found no overall effect, and fasting glucose rose in people aged 50 or younger [7].\n\nInflammation: The 2019 meta-analysis found no significant effect on C-reactive protein, tumor necrosis factor or interleukin-1 [5].\n\nGut Microbiome Effects\n\nA 2022 randomized controlled trial gave 102 middle-aged adults with high-normal blood pressure an aronia polyphenol extract or a placebo for 12 weeks [4]. Arterial stiffness improved with aronia, while blood pressure, endothelial function and blood lipids did not change. Gut microbiome gene richness rose, as did butyrate-producing species. The authors suggest that polyphenols reaching the colon, and the bacteria that break them down, may help explain the effect on the arteries.\n\nSee our Berries page for an overview of anthocyanin-rich foods, and our Black Currant page for another high-anthocyanin berry with complementary research.\n\nPractical Use\n\nForm | Typical amount | Notes\n\nFresh or frozen berries | 100–200g | Very tart; works well in smoothies with sweeter fruits\nUnsweetened juice | 100–300 mL/day | Choose 100% juice\nStandardized extract capsules | 300–500 mg/day | Most convenient; standardized to anthocyanin content\nDried powder | 1–3 tsp | Can be added to smoothies, yogurt, oatmeal\n\nStudies have generally run 4 to 12 weeks [3][4]; Broncel's study used 100 mg of extract three times a day [2]. No dose has been shown to lower blood pressure or cholesterol reliably [7]. Aronia has no documented serious drug interactions and is well tolerated, though high amounts may cause mild digestive discomfort due to the high tannin content.","deepText":"Evidence Review\n\nPolyphenol Chemistry and Bioactivity\n\nRen et al. (2022) in Molecules published a comprehensive review of the bioactive constituents of Aronia melanocarpa and their pharmacological activities [6]. Aronia berries contain total polyphenol concentrations of 1500–8000 mg gallic acid equivalents per 100g fresh weight — among the highest documented for any commercially available fruit. Anthocyanin content ranges from 400 mg to over 1400 mg per 100g depending on cultivar and ripeness, with cyanidin glycosides dominating. Proanthocyanidin concentrations (500–1000 mg per 100g) are also exceptionally high. In vitro and animal model studies summarized in the review demonstrate antidiabetic, antineoplastic, antimicrobial, hepatoprotective, and neuroprotective activities through mechanisms including NF-κB pathway inhibition, Nrf2/ARE upregulation, AMPK activation, and direct free radical scavenging. Human bioavailability data show peak plasma anthocyanin concentrations 1–2 hours after aronia juice consumption, with gut microbiota converting unabsorbed polyphenols into smaller phenolic acids (protocatechuic acid, phloroglucinol derivatives) that circulate for hours longer and contribute to systemic effects.\n\nMeta-Analysis: Lower Systolic Pressure and Cholesterol (Hawkins et al.)\n\nHawkins et al. (2021) in the Journal of Dietary Supplements pooled controlled trials of daily aronia extract taken for an average of 6 to 8 weeks, with three separate analyses (systolic blood pressure, diastolic blood pressure and total cholesterol) and age as a moderator [1]. They concluded that aronia significantly lowered systolic blood pressure and total cholesterol, with larger effects in adults over 50, and called it safe. The abstract reports significant falls only for systolic pressure and total cholesterol; LDL and HDL cholesterol were not among the outcomes analysed.\n\nBefore-and-After Study: Metabolic Syndrome (Broncel et al.)\n\nBroncel et al. (2010) in Medical Science Monitor gave 25 patients with metabolic syndrome aronia extract (100 mg three times a day) for two months and compared their readings with their own baseline; 22 healthy volunteers were measured for comparison but not treated [2]. Systolic pressure fell from 143.4 to 131.8 mmHg and diastolic pressure from 87.2 to 82.1 mmHg, and endothelin-1 (a vasoconstrictor), total cholesterol, LDL cholesterol, triglycerides and a marker of lipid peroxidation (TBARS) fell, while the antioxidant enzymes superoxide dismutase and glutathione peroxidase rose. There was no placebo group, so these before-and-after changes cannot be separated from regression to the mean, other treatment or the effect of being studied.\n\nOpen-Label Study: Metabolic Syndrome (Tasic et al.)\n\nTasic et al. (2021) in Molecular and Cellular Biochemistry examined 4 weeks of a standardized aronia extract in 143 male and female patients with metabolic syndrome in a prospective open-label study [3]. Over 28 days of follow-up, supplementation significantly altered blood pressure and heart rate values. After 2 weeks, cholesterol had fallen significantly in one subgroup and LDL cholesterol in another, compared with each group's baseline, and triglycerides fell significantly after 4 weeks only in the diabetic groups, not in the non-diabetic groups. Higher polyphenol or extract consumption was correlated with positive effects on body weight, total cholesterol, low- and high-density lipoproteins, blood pressure, and glycemia, and the authors concluded that increasing consumption of polyphenol-rich foods could be a promising strategy to reduce cardiovascular risk. Like Broncel's study, it had no placebo group.\n\nRandomized Controlled Trial: Arterial Function and Gut Microbiome\n\nLe Sayec et al. (2022) in Clinical Nutrition ran a 12-week double-blind, placebo-controlled parallel trial in 102 prehypertensive middle-aged adults: 51 took an encapsulated aronia polyphenol extract and 51 a maltodextrin placebo [4]. Arterial stiffness improved with aronia compared with placebo: awake pulse wave velocity fell by 0.24 m/s and 24-hour peripheral augmentation index by 6.8 percentage points. Office and 24-hour blood pressure, flow-mediated dilation (endothelial function) and blood lipids did not change. Gut microbiome gene richness rose, as did butyrate-producing species such as Lawsonibacter asaccharolyticus and Intestinimonas butyriciproducens, and aronia-derived phenolic metabolites were associated with both the microbiome and arterial stiffness. It is the only randomized trial among this article's references, and it found no effect on blood pressure or cholesterol.\n\nMeta-Analysis: A Diastolic Rise, No Systolic Effect (Rahmani et al.)\n\nRahmani et al. (2019) in Phytotherapy Research meta-analysed seven randomized controlled trials found in PubMed, Cochrane and Scopus up to December 2018 [5]. Aronia raised HDL cholesterol slightly (weighted mean difference 1.48 mg/dl) and, against expectations, diastolic blood pressure (2.55 mmHg, 95% CI 0.63 to 4.47). It had no significant effect on systolic blood pressure, C-reactive protein, tumor necrosis factor or interleukin-1. Total and LDL cholesterol fell more clearly in trials shorter than 10 weeks, and a dose-response analysis linked 300 mg a day to lower triglycerides. The authors' conclusion stressed the HDL and cholesterol findings; the blood pressure results run against the claim that aronia lowers blood pressure.\n\nMeta-Analysis: No Clear Effect (Frumuzachi et al.) …","deepTruncated":true,"references":[{"id":"1","title":"Daily supplementation with aronia melanocarpa (chokeberry) reduces blood pressure and cholesterol: a meta analysis of controlled clinical trials","authors":"Hawkins J, Hires C, Baker C, Keenan L, Bush M","year":2021,"journal":"Journal of Dietary Supplements","pmid":"32794414","url":"https://pubmed.ncbi.nlm.nih.gov/32794414/"},{"id":"2","title":"Aronia melanocarpa extract reduces blood pressure, serum endothelin, lipid, and oxidative stress marker levels in patients with metabolic syndrome","authors":"Broncel M, Kozirog M, Duchnowicz P, Koter-Michalak M, Sikora J, Chojnowska-Jezierska J","year":2010,"journal":"Medical Science Monitor","pmid":"20037491","url":"https://pubmed.ncbi.nlm.nih.gov/20037491/"},{"id":"3","title":"Black chokeberry Aronia melanocarpa extract reduces blood pressure, glycemia and lipid profile in patients with metabolic syndrome: a prospective controlled trial","authors":"Tasic N, Jakovljevic VLJ, Mitrovic M, Djindjic B, Tasic D, Dragisic D, Citakovic Z, Kovacevic Z, Radoman K, Zivkovic V, Bolevich S, Nikolic Turnic T","year":2021,"journal":"Molecular and Cellular Biochemistry","pmid":"33666827","url":"https://pubmed.ncbi.nlm.nih.gov/33666827/"},{"id":"4","title":"The effects of Aronia berry (poly)phenol supplementation on arterial function and the gut microbiome in middle aged men and women: Results from a randomized controlled trial","authors":"Le Sayec M, Xu Y, Laiola M, Alvarez Gallego F, Katsikioti D, Durbidge C, Kivisild U, Armes S, Lecomte M, Fanca-Berthon P, Fromentin E, Plaza Onate F, Cruickshank JK, Rodriguez-Mateos A","year":2022,"journal":"Clinical Nutrition","pmid":"36228567","url":"https://pubmed.ncbi.nlm.nih.gov/36228567/"},{"id":"5","title":"The effect of Aronia consumption on lipid profile, blood pressure, and biomarkers of inflammation: A systematic review and meta-analysis of randomized controlled trials","authors":"Rahmani J, Clark C, Kord Varkaneh H, Lakiang T, Vasanthan LT, Onyeche V, Mousavi SM, Zhang Y","year":2019,"journal":"Phytotherapy Research","pmid":"31237052","url":"https://pubmed.ncbi.nlm.nih.gov/31237052/"},{"id":"6","title":"Potential Benefits of Black Chokeberry (Aronia melanocarpa) Fruits and Their Constituents in Improving Human Health","authors":"Ren Y, Frank T, Meyer G, Lei J, Grebenc JR, Slaughter R, Gao YG, Kinghorn AD","year":2022,"journal":"Molecules","pmid":"36431924","url":"https://pubmed.ncbi.nlm.nih.gov/36431924/"},{"id":"7","title":"Impact of a Chokeberry (Aronia melanocarpa (Michx.) Elliott) Supplementation on Cardiometabolic Outcomes: A Critical Systematic Review and Meta-Analysis of Randomized Controlled Trials","authors":"Frumuzachi O, Mocan A, Rohn S, Gavrilaș L","year":2025,"journal":"Nutrients","pmid":"40362797","url":"https://pubmed.ncbi.nlm.nih.gov/40362797/"},{"id":"8","title":"Effects of Aronia melanocarpa on Cardiometabolic Diseases: A Systematic Review of Quasi-Design Studies and Randomized Controlled Trials","authors":"Christiansen CB, Mellbye FB, Hermansen K, Jeppesen PB, Gregersen S","year":2022,"journal":"The Review of Diabetic Studies","pmid":"35831939","url":"https://pubmed.ncbi.nlm.nih.gov/35831939/"}],"wordCount":2016,"source":{"path":"src/content/topics/aronia-berry/antioxidants-cardiovascular-and-metabolic-health.md"},"citeAs":"“Does aronia berry lower blood pressure and cholesterol?.” What's Healthy and Why. https://whatshealthyandwhy.com/aronia-berry/antioxidants-cardiovascular-and-metabolic-health","notice":"General information backed by peer-reviewed research, not medical advice."}