Elderberry Shots for Cold and Flu Season: Do They Actually Work?

Written by Queen Bee Wellness Team | Updated March 2026 | 13-minute read

Every fall, like clockwork, elderberry products fly off the shelves as cold and flu season approaches. And every year, the debate continues: Is elderberry a legitimate immune-supporting powerhouse, or just another wellness fad riding the wave of ancient reputation?

We believe you deserve an honest answer. Not one that hypes elderberry into a miracle cure to sell more product. Not one that dismisses it as pseudoscience to seem edgy. The actual, nuanced truth that the research supports.

So here it is: the evidence for elderberry's effects on cold and flu symptoms is genuinely promising, but it comes with important caveats that any responsible company should share with you. Let us walk through what we know, what we do not, and how to make smart decisions about elderberry shots.

What Is Elderberry? A Quick Primer

Sambucus nigra, commonly known as European elderberry or black elderberry, is a small tree native to Europe that has been used in traditional medicine for centuries. Hippocrates, the father of modern medicine, reportedly called the elder tree his "medicine chest" around 400 BCE.

The berries are deep purple-black, almost ink-colored, and that intense pigmentation is not cosmetic -- it is a direct indicator of their extraordinarily high anthocyanin content. We will get to why that matters in a moment.

One essential safety note before we go further: raw elderberries contain cyanogenic glycosides and should never be consumed uncooked. All legitimate elderberry products, including wellness shots, use properly processed elderberry that has been cooked or extracted to eliminate these compounds. This is non-negotiable. If someone offers you raw elderberry juice, politely decline.

Anthocyanins: The Bioactive Compounds Behind the Benefits

Elderberry's health effects are primarily attributed to its anthocyanin content -- a class of flavonoid pigments responsible for the deep purple, blue, and red colors in many fruits and vegetables. But elderberry is not just any anthocyanin source. It is one of the most concentrated natural sources available.

To put this in perspective:

Data compiled from Wu X, et al. J Agric Food Chem. 2006;54(11):4069-4075. doi:10.1021/jf060300l

The dominant anthocyanins in elderberry are cyanidin-3-glucoside and cyanidin-3-sambubioside. These specific compounds have been studied for their antioxidant activity, anti-inflammatory effects, and potential interaction with viral proteins (Lee J, Finn CE. J Funct Foods. 2012;4(1):213-220. doi:10.1016/j.jff.2011.10.003).

The Science: What Clinical Studies Actually Show

The 2019 Meta-Analysis (Hawkins et al.)

The most frequently cited evidence for elderberry comes from a 2019 meta-analysis published in Complementary Therapies in Medicine. Researchers analyzed randomized controlled trials and found that elderberry supplementation substantially reduced upper respiratory symptoms (Hawkins J, et al. Complement Ther Med. 2019;42:361-365. doi:10.1016/j.ctim.2018.12.004).

Specifically, the analysis found that elderberry supplementation:

• Significantly reduced cold duration and severity compared to placebo
• Showed stronger effects when taken at the onset of symptoms versus as a preventive measure
• Was associated with a favorable safety profile with no serious adverse events

The authors concluded that elderberry supplementation represented a safe and potentially effective treatment for viral upper respiratory infections, though they noted the need for larger, more rigorous trials.

The 2021 Systematic Review

A more recent systematic review published in 2021 in Phytotherapy Research examined the broader evidence base for elderberry in respiratory infections. The authors confirmed that available evidence suggests elderberry may reduce the severity and duration of colds, but also emphasized that many existing studies have methodological limitations, including small sample sizes and short study durations (Wieland LS, et al. BMC Complement Med Ther. 2021;21(1):112. doi:10.1186/s12906-021-03159-2).

The Tiralongo et al. Air Travel Study (2016)

One of the more interesting and well-designed studies focused specifically on air travelers -- a population frequently exposed to respiratory pathogens. This randomized, double-blind, placebo-controlled trial found that economy-class passengers who took elderberry extract starting 10 days before travel and continuing 4-5 days after arrival experienced significantly shorter cold episodes and less severe symptoms compared to the placebo group (Tiralongo E, et al. Nutrients. 2016;8(4):182. doi:10.3390/nu8040182).

In Vitro Antiviral Evidence

Laboratory studies have shown that elderberry compounds can inhibit viral replication. A 2019 study published in the Journal of Functional Foods demonstrated that elderberry juice and specific elderberry phytochemicals could inhibit influenza virus entry and replication in cell cultures. The proposed mechanism involved direct interaction with influenza hemagglutinin (HA) proteins and stimulation of cytokine production (Torabian G, et al. J Funct Foods. 2019;54:353-360. doi:10.1016/j.jff.2019.01.031).

How Elderberry May Work: Proposed Mechanisms

Researchers have identified several mechanisms through which elderberry compounds may support immune function:

1. Direct Antiviral Activity

Elderberry flavonoids appear to bind directly to certain viral surface proteins, potentially preventing viruses from entering and infecting host cells. This has been demonstrated specifically for influenza A and B strains in laboratory studies (Roschek B, et al. Phytochemistry. 2009;70(10):1255-1261. doi:10.1016/j.phytochem.2009.06.003).

2. Cytokine Modulation

Elderberry has been shown to stimulate the production of certain inflammatory cytokines -- signaling molecules that coordinate the immune response. Specifically, elderberry extract may increase the production of IL-6, IL-8, and TNF, which help activate and recruit immune cells to fight infection (Barak V, et al. Eur Cytokine Netw. 2001;12(2):290-296. PMID: 11399518).

It is worth noting that this cytokine-stimulating effect is why some researchers have raised theoretical concerns about elderberry use in cases of severe respiratory infections where cytokine storms are a risk. We address this in the safety section below.

3. Antioxidant Protection

The high anthocyanin content provides substantial antioxidant protection, which may help reduce oxidative stress during illness. Oxidative stress increases during infections, and the body's antioxidant reserves can be depleted. Supplementing with antioxidant-rich compounds like elderberry anthocyanins may help maintain cellular defenses during illness.

4. Mucous Membrane Support

Some traditional uses of elderberry relate to its potential support of mucous membrane health in the respiratory tract, though this mechanism is less well-studied than the others.

An Honest Assessment: What We Know and What We Don't

Here is where we level with you, because integrity matters more than sales:

We share this context because we believe informed consumers make better choices. If we only told you the positive findings, we would be doing you a disservice. Elderberry is genuinely promising -- the evidence is more robust than many natural remedies -- but it is not magic, and anyone who tells you otherwise is selling something besides wellness.

Choosing an Elderberry Shot: What to Look For

The elderberry product market has a quality spectrum as wide as the Grand Canyon. Here is what separates effective elderberry shots from ineffective ones:

Species Matters

Look for products using Sambucus nigra (European elderberry), which is the species used in the vast majority of clinical studies. Some products use American elderberry (Sambucus canadensis), which has a slightly different anthocyanin profile and less clinical data.

Processing Method

Cold-pressed or low-heat extraction preserves more anthocyanins and other heat-sensitive compounds. High-heat processing can degrade these bioactive compounds, reducing efficacy while ensuring safety. The best manufacturers find the balance: enough processing to eliminate cyanogenic glycosides, but gentle enough to preserve anthocyanins.

Added Sugars

Many elderberry syrups and shots contain substantial added sugar, which is counterproductive for immune support. Research suggests that high sugar intake can temporarily suppress immune cell function (Sanchez A, et al. Am J Clin Nutr. 1973;26(11):1180-1184. doi:10.1093/ajcn/26.11.1180). Choose products sweetened with raw honey or unsweetened formulations.

Complementary Ingredients

Elderberry works well alongside other immune-supporting ingredients. Vitamin C, zinc, echinacea, and raw honey can provide complementary pathways of immune support. A well-formulated elderberry shot considers these synergies.

When and How to Take Elderberry Shots

Preventive Use (Before You Get Sick)

For seasonal prevention, consider starting elderberry supplementation several weeks before cold and flu season peaks. The Tiralongo air travel study, which showed preventive benefits, began supplementation 10 days before the high-exposure event. A reasonable approach for seasonal use would be to begin daily elderberry shots in early fall and continue through early spring.

Acute Use (At the First Sign of Illness)

The clinical evidence is strongest for elderberry taken at the onset of cold or flu symptoms. If you feel that telltale scratchy throat or the first hints of congestion, that is the time to increase your elderberry intake. The Hawkins meta-analysis found the most significant symptom reduction in studies where supplementation began within 24-48 hours of symptom onset.

Pairing with Other Wellness Shots

Elderberry works synergistically with other immune-supporting formulations. Consider pairing it with a daily turmeric-ginger shot for year-round foundational support. Queen Bee's DAILY Cold Pressed Ayurvedic Wellness Shot provides the anti-inflammatory and antioxidant base that complements elderberry's more targeted antiviral activity. For a comprehensive comparison of wellness shot types, see our guide to the best wellness shots for immunity.

Safety Considerations and Contraindications

Elderberry has an excellent safety record in clinical studies when properly processed, but there are important considerations:

The Cytokine Storm Concern

You may have heard warnings about elderberry potentially causing a "cytokine storm." Here is the context: elderberry stimulates certain pro-inflammatory cytokines as part of its immune-activating mechanism. Some researchers hypothesized that this could theoretically worsen outcomes in severe respiratory infections where excessive cytokine production (a cytokine storm) is a complication.

However, it is important to note that this concern is based on in vitro (laboratory) findings, not human clinical data. No human study or case report has documented elderberry causing a cytokine storm. The clinical trials that exist show elderberry reducing symptom duration, not worsening it. Still, out of an abundance of caution, some healthcare providers recommend discontinuing elderberry if symptoms become severe or if a serious respiratory infection is suspected.

Drug Interactions

Elderberry may interact with immunosuppressive medications and diabetes medications. If you take any prescription medications, especially those affecting the immune system, consult your healthcare provider before starting elderberry supplementation.

Autoimmune Conditions

Given elderberry's immune-stimulating properties, individuals with autoimmune conditions should consult their rheumatologist or immunologist before use. The immune-modulating effects that benefit healthy individuals could theoretically be problematic for those whose immune systems are already overactive.

Quality and Processing

Always use commercially processed elderberry products from reputable brands. Never attempt to make elderberry preparations from raw berries without proper knowledge and equipment. Raw elderberries, bark, and leaves contain cyanogenic glycosides that can cause nausea, vomiting, and more serious symptoms. Proper heat processing eliminates these compounds while preserving the beneficial anthocyanins.

For more strategies on supporting your immune system naturally, explore our guides on natural cold remedies and how to boost immunity naturally.

Frequently Asked Questions

The Verdict: A Valuable Tool, Not a Silver Bullet

Elderberry is not a miracle cure. But then, nothing is. What it appears to be -- based on the best available evidence -- is a genuinely useful tool for reducing the misery and duration of seasonal colds and flu, backed by a safety profile that centuries of traditional use and modern clinical research both support.

The key is to set realistic expectations and use elderberry as part of a comprehensive approach to immune health. That means combining it with foundational practices: sleep, stress management, nutritious food, movement, and yes, perhaps a daily anti-inflammatory wellness shot like the DAILY Cold Pressed Ayurvedic Wellness Shot for year-round foundational support.

Explore the complete Queen Bee Wellness collection, including our Elderberry Wellness Shot and Fire Cider Wellness Shot, and build a seasonal immune support routine that works for your life. For more on fire cider's traditional immune-supporting role, see our fire cider benefits guide.

References

1. Hawkins J, et al. Black elderberry (Sambucus nigra) supplementation effectively treats upper respiratory symptoms: A meta-analysis. Complement Ther Med. 2019;42:361-365. doi:10.1016/j.ctim.2018.12.004
2. Wieland LS, et al. Elderberry for prevention and treatment of viral respiratory illnesses: a systematic review. BMC Complement Med Ther. 2021;21(1):112. doi:10.1186/s12906-021-03159-2
3. Tiralongo E, et al. Elderberry Supplementation Reduces Cold Duration and Symptoms in Air-Travellers. Nutrients. 2016;8(4):182. doi:10.3390/nu8040182
4. Torabian G, et al. Anti-influenza activity of elderberry (Sambucus nigra). J Funct Foods. 2019;54:353-360. doi:10.1016/j.jff.2019.01.031
5. Roschek B, et al. Elderberry flavonoids bind to and prevent H1N1 infection in vitro. Phytochemistry. 2009;70(10):1255-1261. doi:10.1016/j.phytochem.2009.06.003
6. Barak V, et al. The effect of Sambucol on cytokine production and viral infection. Eur Cytokine Netw. 2001;12(2):290-296. PMID: 11399518
7. Wu X, et al. Concentrations of Anthocyanins in Common Foods in the United States. J Agric Food Chem. 2006;54(11):4069-4075. doi:10.1021/jf060300l
8. Lee J, Finn CE. Anthocyanins and other polyphenolics in American elderberry. J Funct Foods. 2012;4(1):213-220. doi:10.1016/j.jff.2011.10.003
9. Sanchez A, et al. Role of Sugars in Human Neutrophilic Phagocytosis. Am J Clin Nutr. 1973;26(11):1180-1184. doi:10.1093/ajcn/26.11.1180

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Elderberry supplements are not a substitute for flu vaccination or professional medical treatment. Always consult with a qualified healthcare professional before starting any new supplement routine.