Health Guide
Japanese boxwood
Japanese Hawthorn (known as *San-zashi* in Japan) is a small, tart fruit from the hawthorn shrub, distinct from Western varieties. While often used as an ornamental, its deep red berries are a nutritional powerhouse used for centuries in East Asian traditional medicine. It is rich in polyphenols, flavonoids, and proanthocyanidins—potent antioxidants that combat oxidative stress. Unlike synthetic supplements, this is a whole-food extract. It matters because it supports heart health and digestion naturally, acting as a gentle regulator for your cardiovascular system and gut.
Evidence BasedDietary Supplement
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Health Benefits & Sources
Why You Need It
- Heart Health & Blood Pressure: It helps relax blood vessels, improving circulation and maintaining healthy blood pressure levels.
- Digestive Aid: Traditionally used to 'move stagnation,' it helps break down food, especially fatty or heavy meals, relieving bloating.
- Antioxidant Protection: Packed with OPCs (oligomeric proanthocyanidins), it protects cells from aging and inflammation.
Deep Dive
Japanese Hawthorn works primarily through its active compounds: flavonoids and cardiac glycosides. Unlike harsh stimulants, it acts as a 'cardiotonic,' meaning it helps the heart muscle contract more efficiently without overworking it.
For digestion, the fruit's natural acids and enzymes mimic the body's own digestive juices, making it excellent for those with 'sluggish' digestion or acid reflux caused by overeating. It is a favorite among natural health enthusiasts for maintaining vascular elasticity as we age.
Natural Food Sources
Unlike most supplements, Japanese Hawthorn is edible. You can find the fresh or dried fruit in Asian markets.
| Food Source | Amount (Dried Fruit) | Key Compound |
|---|---|---|
| Japanese Hawthorn (San-zashi) | 1-2 fruits | Flavonoids, Vit C |
| Hawthorn Berry Tea | 1 cup brewed | Proanthocyanidins |
| Chinese Hawthorn ( Shan Zha) | 3-5 slices | Crataegus acid |
Supplementation
- Dosage: Standard extracts (standardized to 2-3% flavonoids) usually suggest 300mg to 600mg daily.
- Who should take it: Adults looking to support cardiovascular health or those needing digestive help after heavy meals.
- Form: Look for 'Crataegus cuneata' or 'Japanese Hawthorn' extract capsules.
Top Food Sources
Dried Japanese Hawthorn
Eat 2-3 berries or brew in tea
Hawthorn Berry Extract
Standardized capsules
Hawthorn Leaf & Flower
Usually consumed as tea
Hawthorn Berry Syrup
Common in Traditional Chinese Medicine
Fresh Berries
Seasonal, very tart
Frequently Asked Questions
Yes, the shrub *Buxus microphylla* is the boxwood hedge, but the supplement comes from the fruit of the *Crataegus* (Hawthorn) family. Ensure your supplement is labeled 'Hawthorn Berry' or 'San-zashi'.
It is not a quick fix. Natural heart support usually takes 2 to 4 weeks of consistent use to show measurable results.
Yes, fresh Japanese Hawthorn berries are edible but very tart. They are often made into jams or jellies. Do not eat ornamental boxwood leaves or berries.
It may help indirectly by improving digestion and reducing water retention, but it is not a fat-burner.
Safety & Side Effects
Japanese Hawthorn is generally considered safe when used as directed. However, safety is paramount:
- Drug Interactions: Because it affects the heart, DO NOT take it if you are on prescription heart medications (like Digoxin, Beta-blockers, or blood pressure meds) without a doctor's approval. It can potentiate effects, leading to low blood pressure.
- Pregnancy: Avoid use during pregnancy as it can stimulate uterine contractions.
- Surgery: Stop taking it at least 2 weeks before surgery due to effects on blood pressure.
- Allergies: Those allergic to roses or apples may react to hawthorn.
Scientific References
- [1]Zhang, J., et al. (2018). 'Hawthorn (Crataegus) in the treatment of cardiovascular disease.' *Phytomedicine*.
- [2]Chang, Q., et al. (2002). 'The functional role of proanthocyanidins from hawthorn.' *Journal of Ethnopharmacology*.
- [3]Walker, A. F., et al. (2002). 'Promising hypotensive effect of hawthorn extract.' *British Journal of General Practice*.