Elderberry
Sambucus nigra — also: Black elder, Sambucus
Small human trials suggest reduced symptom duration; evidence base is limited and partly industry-funded.
A classic European folk remedy; elderflower and cooked berries used for colds, fevers, and respiratory complaints.
May modestly reduce cold/flu symptom duration when started early.
Anthocyanins/flavonoids with antioxidant and possible antiviral activity in lab studies.
- Possible shorter cold/flu symptoms when used early
Small RCTs suggest benefit; evidence limited and needs larger independent trials.
- Limited, partly funded studies
- Best dose/timing unclear
- Toxicity if raw/undercooked
- GI upset
- Anyone using raw/unripe preparations; young children with raw forms
RAW or unripe berries, leaves, bark, and seeds are TOXIC (cyanogenic) — must be cooked. Raw consumption causes nausea/vomiting.
Theoretical immune and diuretic interactions; limited data.
Insufficient pregnancy data; never give raw preparations to children.
Forageable but easily confused with toxic look-alikes; ALWAYS cook berries. Make syrup and refrigerate.
- Small RCTs suggest reduced cold/flu symptom duration when started early.
- Lab studies show antiviral and antioxidant activity of anthocyanins.
- Several trials are small and some are funded by product makers.
Promising but thin; raw/unripe material is toxic (cyanogenic) and must be cooked.
Larger independent trials and confirmation against laboratory-verified influenza.
Helpful early in a cold — but cook it. Raw elder is a genuine poisoning risk.