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Elderberry

herbs

Elderberry (Sambucus nigra) is a traditional herbal remedy derived from the dark purple berries of the elder plant, rich in anthocyanins and other polyphenols. It has been used for centuries to support immune function and may help reduce the duration and severity of cold and flu symptoms. Modern research supports some traditional uses, though evidence remains mixed for certain applications.

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Benefits

Immune system support
Reduced cold and flu duration
Anti-inflammatory properties
Antioxidant protection
Upper respiratory tract health

Dosage

Typical Dose

300-500 mg daily for prevention; 500-1000 mg daily during illness

Upper Limit

2000 mg daily maximum

Timing

With meals to improve absorption and reduce gastrointestinal upset

Forms & Bioavailability

Standardised extract

Highest bioavailability; concentrated anthocyanins (typically 16-25% standardisation)

Syrup

Good bioavailability; traditional form with added sweeteners

Capsules/tablets

Moderate bioavailability; convenient dosing with variable potency

Fresh or dried berries

Lower bioavailability; whole food source with lower concentration

Side Effects

Gastrointestinal upset (nausea, stomach cramps, diarrhoea)
Allergic reactions (rare; more common in those with ragweed sensitivity)
Uncooked berries may cause mild toxicity

Interactions

May interact with immunosuppressant medications
Potential interaction with diabetes medications (may lower blood sugar)
Possible interaction with diuretics

Research Summary

Clinical trials show mixed but generally positive results, with some studies demonstrating elderberry reduces cold duration by 1-2 days and flu severity. A 2016 meta-analysis found modest evidence supporting immune support claims. Quality and standardisation of commercial products vary significantly, affecting research reproducibility.

The Bottom Line on Elderberry

Elderberry is well-researched with strong evidence supporting its primary benefits.It is most commonly used for immune system support and reduced cold and flu duration. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.

About Our Research

This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.

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Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement, especially if you have existing health conditions or take medication.

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