Blackthorn
Evidence: MixedUseful mainly for no condition has human evidence of benefit.
Quick decision guide
May help most
No condition has human evidence of benefit
Common dosing range
300–600 mg/day of fruit/flower extract (traditional, not validated)
When to expect effects
Unknown
Watch out for
Seeds/kernels contain cyanogenic compounds; use fruit/flower products only
What is it
Blackthorn (Prunus spinosa) is a European shrub whose dark astringent fruit (sloe), flowers, and leaves are used in folk medicine and to flavor drinks such as sloe gin. As a supplement it is taken as a mild traditional tonic, but it has essentially no controlled human evidence for any health use.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Probably skip if…
Evidence at a glance
| Goal | Evidence | Effect | Best fit | Time |
|---|---|---|---|---|
| antioxidant / general tonic use | Mixed Evidence | Not established in humans | None established | Unknown |
Evidence for 1 use
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
antioxidant / general tonic use
Mechanism onlyPrunus spinosa fruit and flowers are rich in polyphenols and show antioxidant and mild antimicrobial activity in laboratory assays. There are no controlled human trials demonstrating any clinical benefit, so its traditional tonic uses remain unsubstantiated.
Bottom line: Only lab-level antioxidant data exist; no human study supports any health benefit.
How to take it
- Typical dose
- 300–600 mg/day of fruit or flower extract is a typical traditional range, not based on trials
- Timing
- Any time of day
- With food
- No human data to guide this
- How long to try
- No validated trial period
What to track
- Nothing validated — no human-tested outcome exists
Safety
Common side effects
Astringency, Possible mild GI upset
Serious risks
- Seeds/kernels contain cyanogenic glycosides (amygdalin) and should not be consumed
Who should avoid it
- Pregnant or breastfeeding people (no data)
- Anyone using kernel-containing preparations
Pregnancy & breastfeeding
Avoid — no safety data in pregnancy.
Choosing a product
Look for
- Specifies fruit or flower (not seed/kernel)
- Identifies species as Prunus spinosa
- Third-party tested
Be skeptical of
- Any disease-treatment claim
- “Detox” or “blood-purifier” claims
- Kernel/amygdalin “cancer” claims
References by claim
Track Blackthorn with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.