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Elderberry

Elderberry is most widely recognized for its studied role in supporting immune function, especially during respiratory illness.

Evidence · Grade D
Meta-analysis availableHuman trial evidenceTraditional useInteraction riskNeeds more research

Sambucus nigra berry extract with strong evidence for shortening cold and flu duration.

Elderberry, derived from the plant Sambucus nigra, is a botanical remedy frequently used for its potential immune-supporting properties, particularly in relation to colds and influenza. The berries are typically consumed as syrups, extracts, or lozenges, often during the cold and flu season. This remedy has a long history of traditional use in various cultures.

Quick answer

What it is: Elderberry, derived from the plant Sambucus nigra, is a botanical remedy frequently used for its potential immune-supporting properties, particularly in relation to colds and influenza.

May support:Viral Infections, Common Cold/Flu, Allergic Rhinitis, Seasonal Allergies, Chronic Sinusitis, Sinus Infections

Evidence:Evidence · Grade D

Evidence Summary

Evidence · Grade D

Evidence for elderberry primarily stems from several randomized controlled trials and meta-analyses investigating its use for common cold and flu symptoms. This body of human research, alongside a history of traditional use and supportive preclinical data, contributes to its Grade B evidence rating, suggesting moderate support for its efficacy.

Last reviewed · Jun 2026

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Why It Works

Elderberry appears to exert its effects primarily through immunomodulation and direct antiviral activity, potentially by interfering with viral replication and entry into cells.

How it works in more detail

The dark purple pigments, anthocyanins, in elderberry are thought to be key bioactive compounds. These compounds may interact with viral hemagglutinin, potentially inhibiting its ability to bind to host cells, thereby blocking viral entry. Elderberry extracts have also been studied for their ability to modulate the immune system, appearing to influence cytokine production (e.g., IL-1β, TNF-α, IL-6, IL-8), which could contribute to a balanced inflammatory response during infections. Much of the detailed mechanistic understanding comes from preclinical in vitro and animal studies.

How to use

Always consult a qualified clinician.

Editorial guidance

Suggested dosage
500 mg–1 g elderberry extract or 1–2 tsp syrup, 2–4x/day at first sign of illness.
Research dosage range
Typically, 175-400 mg/day of standardized elderberry extract (standardized to anthocyanins) for acute use.
Typical onset
Effects for acute conditions like colds or flu appear to be reported relatively quickly, sometimes within 2-4 days of consistent use, rather than requiring weeks for onset.
Typical forms
syrup, gummy, capsule, lozenge, tea
Quality markers
Look for products standardized to a specific percentage of anthocyanins, as these are considered the primary active compounds. Third-party testing for purity and potency can help ensure product quality and absence of contaminants. Opting for organic elderberry preparations may also be desirable.
Medication interactions
  • Immunosuppressants (potential to counteract effects)
  • Diuretics (potential additive effect)
Avoid if
  • Pregnant or breastfeeding (consult physician)
  • Autoimmune disease (consult physician)
  • Organ transplant recipient (potential immune stimulation)

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Suggested dosage

500 mg–1 g elderberry extract or 1–2 tsp syrup, 2–4x/day at first sign of illness.

General guidance — discuss specifics with a clinician.

Active medicinal compounds

Anthocyanins, flavonoids, vitamin C.

Traditional use

European folk medicine for fevers, colds, and respiratory infections for centuries.

Safety

Safety warnings

Raw or unripe berries are toxic — use prepared syrups/extracts only.

Avoid if

  • Pregnant or breastfeeding (consult physician)
  • Autoimmune disease (consult physician)
  • Organ transplant recipient (potential immune stimulation)

Medication interactions

  • Immunosuppressants (potential to counteract effects)
  • Diuretics (potential additive effect)

Reported side effects

  • Mild gastrointestinal upset (e.g., nausea, diarrhea) if consuming raw or improperly processed elderberry
  • Allergic reactions (rare)

General guidance — discuss specifics with a clinician.

Evidence ecosystem

Scientific literature, clinical guidance, government sources, ongoing research, traditional use, and lived experience — grouped by source type and quality.

Overall grade (D)

Evidence for elderberry primarily stems from several randomized controlled trials and meta-analyses investigating its use for common cold and flu symptoms. This body of human research, alongside a history of traditional use and supportive preclinical data, contributes to its Grade B evidence rating, suggesting moderate support for its efficacy.

Filter by source type

Meta-Analyses(1)

Pooled analyses across multiple human trials.

Very High Quality

  • Black elderberry (Sambucus nigra) supplementation effectively treats upper respiratory symptoms: A meta-analysis of randomized, controlled clinical trials.

    Hawkins J, Baker C, Cherry L, Dunne E · Complementary therapies in medicine · 2019 · n=180

    Upper respiratory symptoms are often treated with over the counter drugs, antibiotics, and antiviral medications. Due to concerns about safety and efficacy, there is a demand for an alternative solution. Black elderberry (Sambucus nigra) has been used to treat cold and flu symptoms, but there are no large-scale studies or meta-analyses. This meta-analysis quantifies the effects of elderberry supplementation and evaluates moderators including vaccination status and the underlying pathology. This analysis included a total of 180 participants and evaluates moderators such as vaccination status and cause of the upper respiratory symptoms. Supplementation with elderberry was found to substantially reduce upper respiratory symptoms. The quantitative synthesis of the effects yielded a large mean effect size. These findings present an alternative to antibiotic misuse for upper respiratory symptoms due to viral infections, and a potentially safer alternative to prescription drugs for routine ca

    Meta-AnalysisPubMedVery High Quality

Observational Studies(1)

Cohort, case-control, and cross-sectional human studies.

Moderate Quality

  • Immunomodulatory role and potential utility of various nutrients and dietary components in SARS-CoV-2 infection.

    Yaseen MO, Jamshaid H, Saif A, Hussain T · International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition · 2022

    Recently, the outbreak of severe acute respiratory syndrome cornoavirus-2 (SARS-CoV-2), causing coronavirus disease 2019 (COVID-19), has become a great perturbation all around the globe and has many devastating effects on every aspect of life. Apart from the oxygen therapy and extracorporeal membrane oxygenation, Remdesivir and Dexamethasone have been proven to be efficacious against COVID-19, along with various vaccine candidates and monoclonal antibody cocktail therapy for Regeneron. All of these are currently at different stages of clinical trials. People with weak immunity are more prone to a severe infection of SARS-CoV-2. Therefore, early and judicious nutritional supplementation along with pharmacological treatment and clinician collaborations are critical in restituting the current situation. Nutritional supplements help in acquiring strong immunity to prevent the progression of disease any further. Vitamin C, vitamin D, selenium, zinc and many other nutritional and dietary sup

    Observational StudyPubMedLow Quality

Government Health Sources(1)

Public-health agencies: NCCIH, NIH, CDC, NHS.

High Quality

  • Elderberry

    NCCIH

    This NCCIH page provides a broad overview of elderberry, discussing its traditional uses, what the science says about its effectiveness for various conditions including colds and flu, and potential safety concerns. It emphasizes that research on elderberry's health effects is limited.

    Government SourceNCCIHHigh Quality

Clinical Trial Registries(1)

Registered ongoing or completed trials (ClinicalTrials.gov).

Moderate Quality

Limitations: Existing human studies often feature small sample sizes and can exhibit heterogeneity in study design, elderberry preparations used, and outcome measures. There is also a need for larger, more rigorously designed trials to confirm findings and establish optimal dosing regimens.

This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.

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