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Hawthorn Berry supplement
Herbal Extract

Hawthorn Berry: Benefits, Dosage, Forms & Research

Herbal Extract

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

TL;DR — Quick Answer

Hawthorn berry extract improves symptoms of mild heart failure including exercise tolerance, fatigue, and shortness of breath. It works by enhancing cardiac output and dilating blood vessels. Standard dosing is 160-900mg standardized extract daily.

Key Facts

What it is
A flavonoid-rich extract from Crataegus berries, leaves, and flowers
Primary benefits
  • Improves heart failure symptoms (NYHA class II)
  • Enhances exercise tolerance and reduces fatigue
  • Mild blood pressure-lowering effects
  • Antioxidant protection for cardiac tissue
  • Supports healthy cardiac contractility
Typical dosage
160-900mg standardized extract daily
Evidence level
Moderate
Safety profile
Generally Safe

What the Research Says

Hawthorn is one of the most studied herbal remedies for cardiovascular support. The Cochrane Review by Pittler et al. (2008) established that hawthorn extract significantly improves exercise tolerance and symptoms in NYHA class II heart failure. The large SPICE trial (Holubarsch et al., 2008, n=2,681) examined hawthorn in class II-III heart failure and found a trend toward reduced sudden cardiac death, though the primary endpoint was not met. Walker et al. (2006) demonstrated modest blood pressure benefits in diabetic patients. The German Commission E has approved hawthorn for stage II heart failure, reflecting its strong European evidence base.

Benefits of Hawthorn Berry

  • Heart failure symptom relief — the Cochrane Review by Pittler et al. (2008) of 14 RCTs (n=855) found hawthorn extract significantly improved maximal workload, exercise tolerance, and subjective symptoms of dyspnea and fatigue in mild heart failure patients.
  • Blood pressure support — a 2006 RCT by Walker et al. found 1200mg hawthorn extract reduced diastolic blood pressure by 2.6 mmHg compared to placebo over 16 weeks in patients with type 2 diabetes.
  • Cardiac contractility — hawthorn OPCs enhance myocardial contractility (positive inotropic effect) without increasing oxygen demand, partly through inhibition of phosphodiesterase and cAMP elevation.
  • Vascular protection — hawthorn flavonoids promote endothelial nitric oxide production, improving vasodilation and reducing arterial stiffness.
Did you know?

Hawthorn is one of the most studied herbal remedies for cardiovascular support.

Forms of Hawthorn Berry

FormBioavailabilityBest For
WS 1442 (Standardized Extract)HighMost studied — standardized to 18.75% OPCs; used in nearly all major clinical trials
LI 132 (Standardized Extract)HighAlternative clinical-grade extract — standardized to 2.2% flavonoids, well-studied in heart failure
Berry/Leaf Powder CapsulesLow-ModerateTraditional use — whole plant material, less potent than standardized extracts

Dosage Recommendations

General recommendation: 160-900mg standardized hawthorn extract daily

Timing: Divide into 2-3 doses throughout the day • Take with food for best absorption.

Dosage by Condition

ConditionRecommended DoseEvidence
Mild heart failure (NYHA II)300-900mg WS 1442 daily in divided dosesStrong
Blood pressure support1200mg hawthorn extract dailyModerate
General cardiovascular wellness160-480mg dailyModerate

Upper limit: 1800mg/day (well-tolerated in clinical trials)

Side Effects and Safety

Safety profile: Generally Safe

Potential Side Effects

  • Mild GI symptoms (nausea, stomach upset)
  • Dizziness or lightheadedness
  • Headache
  • Palpitations (rare, usually at high doses)

Drug & Supplement Interactions

  • Cardiac glycosides (digoxin) — hawthorn may potentiate effects; monitor closely
  • Beta-blockers and calcium channel blockers — additive blood pressure and heart rate lowering
  • PDE5 inhibitors (sildenafil) — additive hypotensive effects
Check Hawthorn Berry interactions with other supplements →
BenefitsDosage GuideSide EffectsTypes & FormsResearchFAQ

Related Conditions

Heart Health

Related Supplements

Garlic Extract (Aged / Allicin)Grape Seed ExtractBergamot (Citrus Bergamot)

Frequently Asked Questions

Can hawthorn replace heart failure medication?

No. Hawthorn is approved in Germany as adjunctive (add-on) therapy for mild heart failure (NYHA class II) but should not replace prescribed medications like ACE inhibitors, beta-blockers, or diuretics. The SPICE trial showed that hawthorn is safe alongside conventional heart failure medications. Always discuss adding hawthorn with your cardiologist, especially if you take digoxin.

How long does hawthorn take to work?

Clinical trials typically show measurable improvements in exercise tolerance and symptom scores after 6-8 weeks of daily use. Some patients notice reduced fatigue and improved breathing within 3-4 weeks. Hawthorn is not a fast-acting remedy — it provides gradual, cumulative cardiovascular support and should be taken consistently for at least 8-12 weeks to assess full benefit.

What is WS 1442 and why does it matter?

WS 1442 is a specific standardized hawthorn extract (standardized to 18.75% oligomeric procyanidins) manufactured by Schwabe Pharmaceuticals. It has been used in virtually all major clinical trials on hawthorn for heart failure, including the SPICE trial. When choosing a hawthorn supplement, look for WS 1442 or an equivalent extract standardized to OPC content to ensure you are getting the same formulation supported by clinical evidence.

References

  1. (). Hawthorn extract for treating chronic heart failure. Cochrane Database of Systematic Reviews. DOI
  2. (). The efficacy and safety of Crataegus extract WS 1442 in patients with heart failure: the SPICE trial. European Journal of Heart Failure. DOI
  3. (). Hypotensive effects of hawthorn for patients with diabetes taking prescription drugs: a randomised controlled trial. British Journal of General Practice.