Crataegus species, berry (also leaf and flower). Europe’s traditional heart herb, rich in flavonoids and oligomeric proanthocyanidins (OPCs), and one of the best-studied herbs in the world.
What the research supports
- Heart failure symptoms: a Cochrane review of 14 trials found small improvements in exercise tolerance and symptoms, alongside standard treatment.
- Heart events and survival: the 2,681-patient SPICE trial found no significant reduction in cardiac deaths or hospital stays.
- Blood pressure: a few small trials found a small drop.
- Safety: well tolerated in trials, but interacts with heart medications.
The dose that was actually studied
Most trials used 900 mg a day of standardized leaf and flower extract (range 160 to 1,800 mg). For berry extracts, follow the label.
Who should not take it
- Anyone with a heart condition, unless their cardiologist agrees.
- People taking digoxin, blood pressure medication, nitrates or erectile dysfunction drugs.
- Pregnant or breastfeeding women.
Our take
A gentle option for a heart-friendly lifestyle in healthy adults. With any heart condition, ask your cardiologist first. Read our full hawthorn heart health guide for every study and the details.
Our pick
Hawaii Pharm Hawthorn Berry Alcohol-Free Liquid Extract: Hawthorn berry in an alcohol-free glycerite. Check with your doctor first if you take heart or blood pressure medication.
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For general education only, not medical advice. Talk to your doctor or pharmacist before starting a supplement, especially if you take medication or are pregnant or breastfeeding.
