Aronia and Elderberry for Immunity: Which to Choose (Comparison)

Aronia and elderberry appear in the same lists “for immunity”, have similar color and similar reputation. However, the similarity ends at appearance. Elderberry has a randomized placebo-controlled study behind it, in which flu symptoms resolved on average four days earlier (Zakay-Rones et al., The Journal of International Medical Research, 2004). Aronia has something different: a study on patients after a heart attack, in which six weeks of supplementation lowered blood pressure and inflammatory markers. These are two different plants for two different applications, and a significant part of what is written about them is based on one repeated unit error. Below you will find what exactly was measured with each of these plants, what protocols were used in clinical studies, and at what point in the season each makes sense.

KEY INFORMATION
• In a randomized placebo-controlled study, flu symptoms resolved on average 4 days earlier after elderberry syrup (Zakay-Rones et al., J Int Med Res, 2004).
• Aronia contains about 250 to over 600 mg of anthocyanins per 100 g of fresh fruit, not 1480: that number refers to a kilogram.
• Aronia extract lowered blood pressure by 11 and 7.2 mmHg in patients after a heart attack (Naruszewicz et al., Atherosclerosis, 2007).
• Raw elderberry fruits contain cyanogenic glycoside and are not suitable for eating.

What do aronia and elderberry really contain?

Both plants provide anthocyanins, but aronia is one of the richest known sources of polyphenols overall. A review of the composition of aronia fruits gathered results from several independent analyses and showed how widely they diverge: the total anthocyanin content ranged from about 250 to over 600 mg per 100 g of fresh fruit, depending on the variety, harvest time, and processing (Sidor and Gramza-Michałowska, Molecules, 2019). Freezing increased the reading, while blanching reduced it by almost half.

Besides anthocyanins, aronia carries procyanidins and phenolic acids, including chlorogenic and neochlorogenic. It is this group of compounds, not the pigments themselves, that is behind the results of studies on the endothelium and blood pressure, which we will return to below.

Incidentally, we clarify the number that almost every Polish text about aronia repeats. “1480 mg of anthocyanins per 100 g” is not an inflated or fabricated measurement: such a value actually appears in the compilation by Sidor and Gramza-Michałowska, only converted to kilograms. When converted to the same unit, it comes out to 148 mg per 100 g, which is below the lower limit of other measurements. One mistaken unit has turned an average result into a world record and has been circulating on the internet for years.

Elderberry has a different profile. Its fruits contain flavonoids, mainly rutin and isoquercitrin, and sambunigrin, which is a cyanogenic glycoside responsible for the toxicity of the raw material. These two groups of compounds can easily be confused in commercial descriptions, and the difference is fundamental: antiviral activity has been demonstrated for flavonoids, while sambunigrin is the reason why the fruits should not be eaten raw.

Aronia and elderberry: what can be compared?

One can compare the profile of ingredients, the strength of evidence, and the situations in which each plant makes sense. It is not possible to reliably compare “the strength of antioxidant action”, because popular indicators like ORAC measure reactions in vitro and do not directly translate to effects in humans. The table below adheres to what has been measured.

What do clinical studies on elderberry show?

The strongest single result remains the Norwegian study from the 1999/2000 season. Zakay-Rones et al. included 60 people aged 18 to 54, whose flu-like symptoms lasted no longer than 48 hours. Participants received 15 ml of elderberry syrup or placebo, four times a day for five days, and recorded the severity of symptoms on a visual analog scale. Symptoms resolved on average four days earlier, and patients less frequently resorted to over-the-counter medications.

A meta-analysis from 2019 gathered available randomized studies and included a total of 180 participants (Hawkins et al., Complementary Therapies in Medicine, 2019). The authors conclude that elderberry supplementation significantly reduces symptoms from the upper respiratory tract, with a large effect size. Note two things: the summary of this meta-analysis does not mention the number “four days”, which belongs to the single study by Zakay-Rones, and 180 participants is a small sample for conclusions about an entire category of products.

The third observation concerns the timing of onset. In the Norwegian study, the inclusion criterion was no more than 48 hours from the first symptoms, so the described effect pertains specifically to such use. This work does not provide data on preventive effectiveness when taken throughout the season.

How does elderberry work against the flu virus?

The laboratory answer is: flavonoids stick to the virus and prevent it from entering the cell. Roschek et al. demonstrated in vitro that elderberry fruit extract inhibited infection with human influenza virus A (H1N1), and isolated flavonoids bound directly to virions, blocking recognition by the host cell or entry into it (Roschek et al., Phytochemistry, 2009).

It is worth clarifying a widespread simplification here. In Polish texts, elderberry is attributed with inhibiting neuraminidase, which is the mechanism of oseltamivir. Roschek’s work describes something different: blocking the virus’s entry into the cell, thus an earlier stage. Oseltamivir serves there as a reference point for the strength of action in vitro, not as an analogy of the mechanism.

The second pathway is immunological and has been studied in animals. Oral administration of high-molecular-weight fractions of elderberry juice to mice infected with the flu virus reduced viral replication in bronchoalveolar lavage and increased the level of specific neutralizing antibodies in serum and secretory immunoglobulin A (Kinoshita et al., Bioscience, Biotechnology, and Biochemistry, 2012). The fraction containing acidic polysaccharides provided the strongest defense. In cell culture, the same juice acted weakly, and the authors attribute the effect in mice to the stimulation of the immune response.

What has been studied with aronia, and what has not?

Aronia has strong evidence, but not for infections. Naruszewicz et al. conducted a double-blind placebo-controlled study with 44 people after a heart attack, who had been taking a statin for at least six months (Naruszewicz et al., Atherosclerosis, 2007). Participants received a flavonoid extract from aronia fruits in three doses of 85 mg daily or placebo for six weeks.

The results after six weeks were clear. Systolic blood pressure dropped on average by 11 mmHg, diastolic by 7.2 mmHg. The concentration of 8-isoprostanes decreased by 38%, oxidized low-density lipoproteins by 29%, high-sensitivity C-reactive protein by 23%, and MCP-1 protein by 29%. Adiponectin increased. The authors emphasize that the effect appeared independently of the statin, which all participants were taking.

What is missing in this study: any endpoint related to infections, colds, or immunity. Aronia made it to the lists “for immunity” based on reasoning about antioxidants, not based on measurements of illness. This does not mean it is useless, only that its documented benefit lies elsewhere than suggested by the store shelf. More broadly about which ingredients have evidence in this area, a separate text discusses supplements for autumn and immunity.

What doses were used in studies?

The following numbers describe study protocols, not recommendations for you. The difference is practical: participants were a selected group, under supervision, for a specified time, and the result pertains to that group, not every reader.

In the Norwegian study on elderberry, 60 patients with flu received 15 ml of standardized elderberry syrup four times a day for five days, counting from no more than 48 hours after the first symptoms. In the Polish study on aronia, 44 people after a heart attack received a flavonoid extract three times daily at 85 mg for six weeks; the declared composition of the extract is about 25% anthocyanins, about 50% polymeric procyanidins, and about 9% phenolic acids.

Two notes about transferring these numbers to store products. First, both studies used standardized preparations, meaning those in which the content of active compounds is declared and controlled; syrup with an ingredient list without any declaration is not the same product, even if it is named the same. Second, how much and how long to take anything is determined by a doctor or pharmacist who knows your medications, not by an article. This is especially true for people undergoing chronic treatment.

When to reach for aronia, and when for elderberry?

The purpose determines the choice, not the strength. Elderberry has evidence regarding the duration of flu-like infection symptoms that started no more than two days earlier. Aronia has evidence regarding blood pressure and inflammatory markers in people after a heart attack, taken systematically for six weeks. Neither of these roles replaces the other.

With elderberry, the form matters. Raw fruits contain sambunigrin, which under enzymatic conditions releases hydrogen cyanide and causes gastrointestinal discomfort. Safe are processed products from cooked fruits and preparations from fruit extract, while the bark and leaves have a different profile and do not belong to the food raw material. An infusion from flowers is a separate matter with a milder effect and a different tradition of use.

Combining both plants is not contradictory, as the mechanisms do not exclude each other, but there is no study that has tested this combination. Special caution is warranted for children, as none of the studies described above included them. With medications, the situation is different than it might seem: in the aronia study, all participants were taking a statin, and the effect appeared despite this, while for other groups of medications, such verification simply does not exist. If you are looking for a summary of what makes sense in this group, check out the text on immunity supplements for children, and for recurrent respiratory infections, refer to the review of studies on NAC in flu and respiratory infections.

Frequently Asked Questions

Which plant works better for immunity?

It depends on what you call action. Elderberry has a randomized placebo-controlled study with 60 patients, in which flu symptoms resolved on average four days earlier (Zakay-Rones et al., 2004). Aronia does not have such a study on infections; its strongest evidence in humans concerns blood pressure and inflammatory markers after a heart attack.

Does aronia really contain 1480 mg of anthocyanins per 100 g?

No. This number comes from the compilation by Sidor and Gramza-Michałowska (Molecules, 2019), but it describes milligrams per kilogram, which means 148 mg per 100 g. Real measurements for fresh fruits range roughly between 250 and 620 mg per 100 g, depending on the variety and processing method. The unit error has been circulating in Polish texts for years.

Does elderberry inhibit neuraminidase like Tamiflu?

Not based on the work cited here. Roschek et al. (Phytochemistry, 2009) demonstrated in vitro that elderberry flavonoids bind to H1N1 virions and block recognition by the host cell or entry into it. Oseltamivir is mentioned there solely as a reference point for the strength of action, not as an analogy of the mechanism.

Can aronia be combined with elderberry?

There is no indication that they exclude each other: they act through different mechanisms, and both raw materials have long been part of the diet. However, there is no study that has tested this combination, so its advantage over a single raw material remains an assumption. When it comes to medications taken regularly, leave the decision to combine anything to your doctor or pharmacist.

Are aronia and elderberry safe for children?

Aronia fruits and juice from them are edible, but concentrated extracts and capsules have not been studied in children, so there is no basis for administering them without consulting a pediatrician. With elderberry, the rule is stricter: raw fruits contain cyanogenic glycoside and are not suitable for eating at any age; only processed products from cooked fruits are safe.

This article is for informational and educational purposes and does not replace consultation with a doctor. If you are pregnant, breastfeeding, taking medications, or have chronic conditions, consult the use of supplements or herbs with a specialist.

Author: Michał Waluk · Published: 2026-07-08 · Updated: 2026-08-15