Elderberry

Also known as: Sambucus nigra, black elderberry, Sambucol

Grade B — Moderate Evidenceherbimmuneantiviral
15–60 mL syrupDuring illness: divided doses throughout day for 5-7 days. Prevention: once-twice daily.

Elderberry (Sambucus nigra) is rich in anthocyanins and flavonoids that have demonstrated antiviral properties, primarily by blocking viral glycoproteins. Meta-analyses of RCTs show that elderberry supplementation significantly reduces the duration and severity of upper respiratory infections, particularly colds and influenza. Most clinical evidence uses standardized elderberry extract at 175-600mg daily, with effects most pronounced when started within 24-48 hours of symptom onset.

TL;DR: Antiviral berry extract that reduces cold duration by ~2 days and flu by ~4 days. Use standardized syrup, never raw berries.

🛡️Immunity
Last reviewed: 2026-03-12

Quick Facts

Evidence

Grade B

Studies

3

Interactions

1

Forms

1

Evidence Rating: Grade B — Moderate Evidence

Some RCTs with positive results, or strong observational evidence. More research may refine our understanding.

Interaction Warnings

ImmunosuppressantsModerate

Stimulates immune system; may counteract immunosuppression; avoid in transplant patients

Important Notes

  • Raw elderberries and plant parts are TOXIC (sambunigrin)
  • Only use prepared extracts
  • Avoid in severe hyperinflammatory illness (cytokine storm concern)

Clinical Evidence (3 studies)

Elderberry reduced cold duration in air travelers

Tiralongo E et al. (2016) — Nutrients

Reduced cold duration and severity in air travelers; RCT (n=312)

View on PubMed

Elderberry for cold in college students

Hawkins J et al. (2019) — Complement Med Res

2-day reduction in duration vs placebo; RCT

View on PubMed

Elderberry vs placebo in influenza

Zakay-Rones Z et al. (2004) — J Int Med Res

4-day shorter illness; RCT

View on PubMed

Alternatives to Consider

These supplements target similar goals and may be worth considering alongside or instead of Elderberry.

Ginger

Grade A

Excellent evidence for anti-nausea effects (pregnancy, chemotherapy, post-op). Also anti-inflammatory with COX-2 inhibition.

🛡️ Immunity

Garlic / Allicin

Grade A

Strong RCT evidence for blood pressure reduction (~8-9/5-6 mmHg) and cold prevention (64% reduction). Aged extract preferred for CV.

🛡️ Immunity

Quercetin

Grade B

Versatile flavonoid with senolytic, immune, and anti-inflammatory properties. Zinc ionophore. Phytosome form critical for absorption.

🛡️ Immunity

Related Supplements

Quercetin

Grade B — Moderate Evidence

Versatile flavonoid with senolytic, immune, and anti-inflammatory properties. Zinc ionophore. Phytosome form critical for absorption.

Ginger

Grade A — Strong Evidence

Excellent evidence for anti-nausea effects (pregnancy, chemotherapy, post-op). Also anti-inflammatory with COX-2 inhibition.

Beta-Glucan

Grade B — Moderate Evidence

Dual-purpose supplement: yeast-derived for immune support (250mg), oat-derived for cholesterol (3g). Both well-supported by RCTs.

Holy Basil (Tulsi)

Grade B — Moderate Evidence

Ayurvedic adaptogen with evidence for stress reduction and blood glucose stabilization. Gentle daily-use herb.

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⚕️ Important Disclaimer

This information is for educational purposes only. It is not medical advice. Always consult a healthcare provider before starting any supplement regimen, especially if you take medications or have health conditions.

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