Aronia and Sea Buckthorn in Scientific Research
1. Aronia carries more anthocyanins than any other food measured
In a USDA screening of more than a hundred common foods, aronia came out highest of everything analysed, at 1480 mg of anthocyanins per 100 g of fresh berry — the top of a range whose bottom end was gooseberry at 0.7 mg. Cyanidin-3-galactoside and cyanidin-3-arabinoside together make up roughly half of them. Figures reported elsewhere run lower, from around 481 mg per 100 g upward, which is what cultivar and season do to this berry. [1]
2. Arterial stiffness and endothelial function
Aronia has two substantial randomised trials here. In a 12-week double-blind, placebo-controlled trial in 102 middle-aged men and women, aronia (poly)phenol supplementation lowered pulse wave velocity by 0.24 m/s and the 24-hour peripheral augmentation index by 6.8%. [2] A separate 12-week double-blind, placebo-controlled trial in 66 healthy men measured flow-mediated dilation — how well an artery widens as blood flow rises — and found aronia extract and whole fruit powder ahead of placebo by 1.2 and 0.9 percentage points. [3] Neither trial used juice; both used measured supplement doses.
3. Cognitive performance
Three randomised controlled trials from one Dutch group have tested aronia on cognition, and they are worth reading precisely. In the largest, 101 healthy middle-aged adults took a standardised aronia extract for 24 weeks: psychomotor speed improved at the 90 mg dose, while attention, cognitive flexibility and mood did not change. [4] A one-week crossover trial in 35 young adults on 180 mg of anthocyanins a day found movement time on a five-choice reaction test 4.8% faster and serum BDNF 5.7% higher, with memory and executive function unchanged. [5] A six-week crossover trial in 30 older adults with overweight or obesity, on 40 mg a day, found errors on a spatial working-memory test reduced by 20%, with memory and psychomotor speed unchanged. [6] All three used a standardised extract rather than juice, and all three were co-authored by the company that makes it.
4. Inflammation, and the body’s own antioxidant enzymes
A 2025 systematic review of human aronia studies lasting four to thirteen weeks reported reductions in C-reactive protein, TNF-α and IL-6, a rise in IL-10, and increased activity of superoxide dismutase, glutathione peroxidase and catalase. [7] Sea buckthorn points the same way from a single large trial: across 233 participants completing 90 days of double-blind, placebo-controlled supplementation, serum C-reactive protein fell significantly against placebo. [8] The same trial found no difference in the number or duration of infections, which is the honest other half of that result.
5. Blood lipids — and who the effect was actually found in
Sea buckthorn has the better evidence of the two. A 2022 systematic review and meta-analysis of 15 randomised controlled trials found triglycerides, total cholesterol and LDL cholesterol lower and HDL cholesterol higher; on subgroup analysis the effect was concentrated in people whose lipids were already abnormal. [9] A randomised crossover trial in 80 overweight women showed the same shape: it was the participants starting at higher cardiometabolic risk whose triglycerides fell on dried berries, and whose total and LDL cholesterol fell on the oil. [10] The same meta-analysis found no effect on blood pressure or blood glucose.
6. Tear film and mucous membranes — sea buckthorn’s strongest human result
In a placebo-controlled, quadruple-masked trial, 100 adults with dry eye symptoms took 2 g of sea buckthorn oil daily for three months across the winter. The supplemented group showed significantly less of the seasonal rise in tear film osmolarity — the standard objective marker of tear film instability — and reported less symptom intensity. [11]
7. Omega-7: what sea buckthorn has and almost nothing else does
Palmitoleic acid occurs naturally in human sebum and in the lipid layers that keep membranes supple. Sea buckthorn is the richest common plant source of it, and the distinction that matters is which part of the berry you press: analysed across berries of different origins and subspecies, the pulp oil is dominated by palmitoleic and palmitic acid, while the seed oil carries almost no palmitoleic acid at all and runs instead to linoleic and alpha-linolenic acid. [12] Pulp and seed are not interchangeable, and most of the trials above used one or the other deliberately.
8. Why one berry dries the mouth and the other sharpens it
Aronia’s astringency is not a taste but a mechanical event. An NMR study worked out the mechanism: polyphenol molecules stack against proline residues on salivary proteins and cross-link with them until the complexes fall out of solution, stripping saliva of its lubricating film. [13] Larger polyphenols bind harder, and aronia’s proanthocyanidins are among the largest in any fruit — mean degrees of polymerisation of 19 to 59 in the berry and 12 to 52 in juice. [14] Sea buckthorn does the opposite: its sharpness is acid, not protein binding. That the two work together is the reason this combination exists.
How much the trials used — and where aronia juice becomes uncomfortable
Two independent human studies giving 200 ml of aronia juice a day reported that around half of participants experienced digestive discomfort — bloating, nausea, loose stools — and the second traced the differences between individuals to their gut microbiome. [15][16] The likely reason is sorbitol, measured in aronia at 8.56 g per 100 g of fruit. [17] It is a sugar alcohol that draws water into the gut at higher doses. Smaller daily amounts are tolerated better than one large one, which is worth knowing before deciding what a portion is.
References
- Wu X, Beecher GR, Holden JM, Haytowitz DB, Gebhardt SE, Prior RL. Concentrations of anthocyanins in common foods in the United States and estimation of normal consumption. J Agric Food Chem. 2006;54(11):4069–4075. doi:10.1021/jf060300l · PMID 16719536
- Le Sayec M, Xu Y, Laiola M, et al. The effects of Aronia berry (poly)phenol supplementation on arterial function and the gut microbiome in middle aged men and women. Clin Nutr. 2022;41(11):2549–2561. doi:10.1016/j.clnu.2022.08.024 · PMID 36228567
- Istas G, Wood E, Le Sayec M, et al. Effects of aronia berry (poly)phenols on vascular function and gut microbiota: a double-blind randomized controlled trial in adult men. Am J Clin Nutr. 2019;110(2):316–329. doi:10.1093/ajcn/nqz075 · PMID 31152545
- Ahles S, Stevens YR, Joris PJ, Vauzour D, Adam J, de Groot E, Plat J. The effect of long-term Aronia melanocarpa extract supplementation on cognitive performance, mood, and vascular function: a randomized controlled trial in healthy, middle-aged individuals. Nutrients. 2020;12(8):2475. doi:10.3390/nu12082475 · PMID 32824483
- Ahles S, Joris PJ, Plat J. Short-term Aronia melanocarpa extract supplementation improves cognitive performance: a randomized, double-blind, placebo-controlled cross-over study in healthy young adults. Eur J Nutr. 2024;63(5):1545–1553. doi:10.1007/s00394-024-03381-3 · PMID 38656355
- Ahles S, et al. Aronia melanocarpa extract supplementation affects brain vascular function and cognitive performance: a randomized, double-blind, placebo-controlled, cross-over study in older adults with overweight or obesity. Clin Nutr. 2025;57:106561. doi:10.1016/j.clnu.2025.106561 · PMID 41499921
- Sarıkaya B, Kolay E, Guney-Coskun M, Yiğit-Ziolkowski A, Aktaç Ş. The effect of black chokeberry (Aronia melanocarpa) on human inflammation biomarkers and antioxidant enzymes: a systematic review. Nutr Rev. 2025;83(6):1083–1098. doi:10.1093/nutrit/nuae143 · PMID 39499790
- Larmo P, Alin J, Salminen E, Kallio H, Tahvonen R. Effects of sea buckthorn berries on infections and inflammation: a double-blind, randomized, placebo-controlled trial. Eur J Clin Nutr. 2008;62(9):1123–1130. doi:10.1038/sj.ejcn.1602831 · PMID 17593932
- Geng Y, Wang J, Chen K, Li Q, Ping Z, Xue R, Zhang S. Effects of sea buckthorn (Hippophae rhamnoides L.) on factors related to metabolic syndrome: a systematic review and meta-analysis of randomized controlled trials. Phytother Res. 2022;36(11):4101–4114. doi:10.1002/ptr.7596 · PMID 36043374
- Larmo PS, Kangas AJ, Soininen P, et al. Effects of sea buckthorn and bilberry on serum metabolites differ according to baseline metabolic profiles in overweight women. Am J Clin Nutr. 2013;98(4):941–951. doi:10.3945/ajcn.113.060590 · PMID 23945716
- Larmo PS, Järvinen RL, Setälä NL, et al. Oral sea buckthorn oil attenuates tear film osmolarity and symptoms in individuals with dry eye. J Nutr. 2010;140(8):1462–1468. doi:10.3945/jn.109.118901 · PMID 20554904
- Yang B, Kallio HP. Fatty acid composition of lipids in sea buckthorn (Hippophaë rhamnoides L.) berries of different origins. J Agric Food Chem. 2001;49(4):1939–1947. doi:10.1021/jf001059s · PMID 11308350
- Baxter NJ, Lilley TH, Haslam E, Williamson MP. Multiple interactions between polyphenols and a salivary proline-rich protein repeat result in complexation and precipitation. Biochemistry. 1997;36(18):5566–5577. doi:10.1021/bi9700328 · PMID 9154941
- Taheri R, Connolly BA, Brand MH, Bolling BW. Underutilized chokeberry (Aronia melanocarpa, Aronia arbutifolia, Aronia prunifolia) accessions are rich sources of anthocyanins, flavonoids, hydroxycinnamic acids, and proanthocyanidins. J Agric Food Chem. 2013;61(36):8581–8588. doi:10.1021/jf402449q · PMID 23941506
- Lackner S, et al. Immunomodulatory effects of aronia juice polyphenols — results of a randomized placebo-controlled human intervention study. Antioxidants (Basel). 2022;11(7):1283. doi:10.3390/antiox11071283 · PMID 35883769
- Lackner S, et al. Interindividual differences in aronia juice tolerability linked to gut microbiome and metabolome changes. Microbiome. 2024;12(1):49. doi:10.1186/s40168-024-01774-4 · PMID 38461313
- Sidor A, Gramza-Michałowska A. Black chokeberry Aronia melanocarpa L. — a qualitative composition, phenolic profile and antioxidant potential. Molecules. 2019;24(20):3710. doi:10.3390/molecules24203710 · PMID 31619015
