Elderberry syrup is a cold-season staple, yet raw elderberries can make you sick. Both things are true. The difference comes down to which part of the plant you use, how ripe it is, and whether it is cooked.
Written by Vita Globe Editorial Team | Reviewed against NIH guidance, CDC reports, university extension guidance and food-science research
Are elderberries poisonous?
Raw or unripe elderberries, and the leaves and stems of the elder tree, contain cyanide-producing compounds that can cause nausea, vomiting and severe diarrhea. Cooking eliminates this toxin[1]. Ripe berries contain far less of these compounds than leaves do[2], and heat processing cuts levels further[3]. Properly cooked or commercially processed elderberry is a different thing from berries eaten straight off the bush.
Caveat: “Cooked” means properly cooked. Problems have been reported with home preparations that include stems, leaves or unripe fruit[4][5].
Sources: NCCIH · Młynarczyk et al., 2018 · Senica et al., 2016 · Verified 2026-09-27
IN THIS ARTICLE
Why can raw elderberries make you sick?
Elder plants contain natural compounds called cyanogenic glycosides. The main one in black elder is sambunigrin. When these compounds break down, they can release cyanide[2]. That is what causes the classic symptoms of elderberry poisoning: nausea, vomiting, abdominal cramps and weakness, and in severe cases dizziness or worse[5].
NCCIH puts it simply: raw or unripe elderberries and other parts of the elder tree, such as the leaves and stem, contain poisonous cyanide-producing substances, and large quantities may cause serious illness[1].
Which parts of the elder plant are the problem?
Not all parts carry the same risk. A review of black elder chemistry reported sambunigrin levels that were highest in the leaves, lower in the flowers, and lowest in the berries, and noted that these compounds occur mainly in unripe berries and break down during heat treatment[2].
| Plant part | Risk level | What to do |
|---|---|---|
| Leaves, stems, bark, roots | Highest | Never eat or add to juice or syrup |
| Unripe (green or red) berries | Higher | Don’t use |
| Ripe dark berries, raw | Lower, but not zero | Always cook first |
| Ripe berries, cooked or processed | Low | The form used in foods and supplements |
Species matters too. Oregon State University Extension notes that red elderberries may have higher toxin concentrations, particularly in the seeds, and advises food preservers not to use them[5].
Has anyone actually been poisoned by elderberries?
Yes. The best-known U.S. case was reported by the CDC in 1984. At a gathering in California, 11 people became ill with nausea and vomiting after drinking juice made from wild elderberries that had been crushed in a press together with their leaves and branches[4]. The CDC’s note pointed to the leaves and other plant parts, rather than the ripe berries, as the likely source of the toxic compounds[4].
The lesson isn’t that elderberry is dangerous. It is that preparation matters: remove every stem and leaf, use only ripe berries, and cook them.
Does cooking make elderberries safe?
Cooking is the key step. NCCIH says cooking eliminates the toxin[1], and OSU Extension says cooking elderberries eliminates the risk and makes them safe to eat[5]. A food-science study that measured processed elderberry products found heat lowered cyanogenic glycosides by 44% in juice, 80% in tea and up to 96% in liqueur and fruit spread[3].
There is a trade-off: heat also lowered the berries’ beneficial polyphenols[3]. Many commercial products use elderberry extracts, which list a set amount per serving on the label. We compare home syrup, store-bought syrup and gummies in Elderberry Syrup vs. Gummies.
The honest summary
- Leaves, stems and unripe berries are the real hazard.
- Ripe raw berries contain less, but should still be cooked.
- Cooking and processing sharply reduce the problem compounds.
- Red elderberries are best avoided for home food preparation.
Is it safe to make your own elderberry syrup?
It can be, if you follow tested guidance. Oregon State University Extension recommends always cooking elderberries, removing stems and leaves before processing, and harvesting only fully ripe fruit[5]. If you aren’t 100% sure of your plant identification, don’t forage. Some other plants have similar-looking berry clusters.
Homemade syrups also vary widely in strength, which makes it hard to know how much elderberry you are actually getting. If you want to know what is in each serving, a labeled product is more predictable. For a look at what the plant is and where it grows, see What Is Black Elderberry?.
Our option
Vita Globe Elderberry 150mg Gummies with Vitamin C & Zinc
Our gummies use elderberry fruit extract (150 mg, 30:1, per two-gummy serving) rather than raw berries, alongside 150 mg of vitamin C and 10 mg of zinc. They are made for adults, vegan, gluten-free and non-GMO, contain coconut (tree nut), and are tested by an independent third-party lab.*
Frequently asked questions
Can you eat raw elderberries?
It isn’t recommended. Raw or unripe berries can cause nausea, vomiting and diarrhea, and cooking eliminates the toxin[1].
How many raw elderberries are poisonous?
There is no reliable safe number. Toxin levels vary by plant, ripeness and species[2][5], so the safest rule is to always cook them.
Are elderflowers poisonous?
Elderflowers contain lower levels of cyanogenic glycosides than the leaves[2]. They are traditionally used in cordials and teas, but the same rule applies: leave out stems and leaves.
Are store-bought elderberry products safe?
Commercial syrups, gummies and lozenges use cooked or processed berries or extracts, which is the form studied in clinical trials, where side effects were uncommon[6].
What are the symptoms of elderberry poisoning?
Nausea, vomiting, abdominal cramps and weakness are typical; severe cases can involve dizziness and more serious effects[5]. Call Poison Control (1-800-222-1222) or seek care if you suspect poisoning.
Sources
- National Center for Complementary and Integrative Health. Elderberry: Usefulness and Safety. Updated November 2024. nccih.nih.gov/health/elderberry
- Młynarczyk K, Walkowiak-Tomczak D, Łysiak GP. Bioactive properties of Sambucus nigra L. as a functional ingredient for food and pharmaceutical industry. J Funct Foods. 2018;40:377-390. doi:10.1016/j.jff.2017.11.025
- Senica M, Stampar F, Veberic R, Mikulic-Petkovsek M. Processed elderberry (Sambucus nigra L.) products: a beneficial or harmful food alternative? LWT – Food Sci Technol. 2016;72:182-188. doi:10.1016/j.lwt.2016.04.056
- Centers for Disease Control. Poisoning from elderberry juice — California. MMWR Morb Mortal Wkly Rep. 1984;33(13):173. cdc.gov/mmwr
- Oehler N, Waite-Cusic J, Hibbard-Swanson J. Play it safe when preserving elderberries (EM 9446). Oregon State University Extension Service; November 2024. extension.oregonstate.edu
- Wieland LS, Piechotta V, Feinberg T, 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/s12906-021-03283-5
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
