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Sambucus Nigra Extract

Also known as: Black elderberry, European elderberry, Elderberry extract, Sambucus nigra L.

Overview

Sambucus nigra extract is derived from the berries and flowers of the black elderberry plant, traditionally used for treating cold, influenza, and upper respiratory tract infections. It is rich in bioactive compounds such as phenolic compounds, flavonoids, and anthocyanins, which contribute to its therapeutic properties. The extract is widely marketed for immune support and for the symptomatic relief of viral respiratory illnesses. Research on Sambucus nigra is moderately mature, with several randomized controlled trials (RCTs) and at least one meta-analysis available, primarily focusing on its effects on upper respiratory symptoms. Evidence quality ranges from moderate to high, with systematic reviews supporting its efficacy in reducing symptom severity and duration.

Benefits

Sambucus nigra extract primarily benefits individuals suffering from common cold and influenza. A 2019 meta-analysis of RCTs (n=180) demonstrated a significant reduction in upper respiratory symptoms, showing a large mean effect size and statistically significant symptom reduction compared to placebo. Clinical trials further report significant reductions in headache, muscle aches, and nasal congestion within 24 to 48 hours of administration, with visual analog scale (VAS) scores for symptoms decreasing markedly versus placebo. The observed effect size indicates clinically meaningful improvement in cold and flu symptoms. Emerging evidence from animal models suggests potential anti-obesity effects by influencing plasma lipid profiles and metabolism-related hormones, though human data are currently lacking. Benefits have been most consistently observed in adults with viral upper respiratory infections; evidence in children or immunocompromised populations is limited.

How it works

Sambucus nigra's therapeutic effects are attributed to its bioactive compounds, particularly anthocyanins and flavonoids, which possess antioxidant, anti-inflammatory, and antiviral properties. The extract is believed to inhibit viral replication by interfering with viral entry and propagation, and to modulate immune responses, thereby reducing inflammation and symptom severity in viral infections. Its molecular targets include viral envelope proteins and host inflammatory pathways. While the precise mechanisms are still being elucidated, these compounds work synergistically to provide symptomatic relief. The bioavailability of anthocyanins is moderate, and extraction methods significantly influence the phenolic content and overall potency of the extract.

Side effects

Sambucus nigra extract is generally considered safe when used at recommended doses in adults. Common side effects are rare and typically mild, primarily involving gastrointestinal discomfort such as nausea or diarrhea. No significant adverse events or drug interactions have been consistently reported in high-quality clinical trials. Contraindications include known allergy to elderberry or other plants in the Caprifoliaceae family. Due to limited research, the safety of Sambucus nigra extract has not been well established for use during pregnancy, lactation, or in pediatric populations. It is important to note that raw or unripe elderberries, as well as other parts of the plant (leaves, stems, bark), contain cyanogenic glycosides and can be toxic if ingested. Therefore, only commercially prepared extracts from berries and flowers should be consumed.

Dosage

Effective doses of standardized elderberry extract in clinical trials typically range from the equivalent of 300–600 mg of anthocyanins daily. This dosage is commonly administered in divided doses over 3–5 days during the acute phase of illness. Extracts are available in various forms, including lozenges, syrups, and capsules. For optimal results, timing is critical, with early administration at the onset of symptoms yielding better outcomes. While there is no established maximum safe dose, adherence to the dosages studied in clinical trials is advised to ensure both efficacy and safety. It is important to use standardized extracts to ensure consistent levels of active compounds.

FAQs

Is elderberry extract effective for preventing colds?

Current evidence primarily supports elderberry extract for reducing the severity and duration of cold and flu symptoms, rather than outright prevention.

Can it be used alongside conventional cold medications?

Generally, elderberry extract can be used with conventional cold medications, but it is always advisable to consult a healthcare provider before combining supplements with prescription drugs.

How soon will I see results?

Symptom improvement with elderberry extract often occurs rapidly, typically within 1 to 2 days of initiating supplementation.

Are there risks of overdose?

At the studied and recommended doses, there is no known severe toxicity or risk of overdose with commercially prepared elderberry extracts.

Research Sources

https://pubmed.ncbi.nlm.nih.gov/30670267/ – This meta-analysis of randomized controlled trials (n=180) investigated the effects of elderberry supplementation on upper respiratory symptoms. It found a large and statistically significant reduction in both the severity and duration of symptoms compared to placebo, supporting elderberry's efficacy for cold and flu. Limitations included a relatively small total sample size and heterogeneity in formulations across studies.
https://pmc.ncbi.nlm.nih.gov/articles/PMC7347422/ – This double-blind, placebo-controlled randomized clinical trial demonstrated that elderberry lozenge use significantly reduced headache, muscle aches, and nasal congestion scores in patients with influenza-like illness. Significant improvements were observed within 24 and 48 hours, highlighting the rapid symptomatic relief provided by elderberry extract. The study was well-controlled with an appropriate placebo group.
https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2024.1410854/full – This in vivo animal study explored the anti-obesity effects of Sambucus nigra extracts in rats. It showed that the extract could modulate metabolic markers, including plasma lipid profiles, suggesting potential benefits for metabolic health. However, this research lacks human clinical data, limiting its direct clinical relevance for human obesity.