Korean Raspberry (Rubus coreanus): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Korean raspberry work in the body?

Korean raspberry (Rubus coreanus) functions primarily through its antioxidant-rich profile, containing compounds like ellagic acid, anthocyanins, and tiliroside. These constituents help neutralize free radicals and reduce oxidative stress. In traditional Hanbang medicine, its mechanism is described as tonifying kidney yang and strengthening essence. This action is believed to support the kidneys' role in fluid metabolism and reproductive health, explaining its use for urinary frequency and impotence. Evidence Level: C.

Does Korean raspberry interact with any medications?

There are currently no well-documented severe drug interactions for Korean raspberry. However, because it influences urinary frequency and kidney function, it may theoretically alter the effects of diuretic medications. Additionally, due to its traditional use for impotence and kidney yang deficiency, individuals taking hormonal therapies or medications for erectile dysfunction should consult a healthcare provider before use to avoid potential overlap or contraindications. Evidence Level: C.

What is the recommended dosage for Korean raspberry?

The standard adult dosage for Korean raspberry is typically 6 to 12 grams of dried berries daily. This can be taken as a decoction, powder, or extract. Because individual tolerance varies, it is best to start with a lower dose to assess effects. Users should follow specific product label instructions or consult a qualified herbalist, particularly if treating specific conditions like blurred vision or urinary frequency. Evidence Level: Traditional.

Is Korean raspberry safe during pregnancy?

No, Korean raspberry is considered unsafe during pregnancy. In traditional medicine, it is a tonic for kidney yang deficiency and may stimulate the uterus or interfere with fetal development. Women who are pregnant or breastfeeding should avoid this herb. Safety data is limited, so it is critical to consult a healthcare professional before using any herbal supplements during pregnancy. Evidence Level: C.

What are the side effects of Korean raspberry?

Korean raspberry is generally well tolerated when taken at recommended dosages. However, because it is a warming tonic, it is contraindicated for individuals with heat conditions. Side effects may include increased body heat or aggravation of symptoms like urinary burning. Those with signs of excess heat or Yin deficiency should avoid use to prevent worsening of these conditions. Evidence Level: Traditional.

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Rubus coreanus, also known as bokbunja, is a black raspberry native to eastern Asia used in traditional oriental medicine and supplementary foods [PMID:33147777]. It is recognized for its antioxidant, anti-inflammatory, and antiviral properties [PMID:22924523, 34226405].

Background

Rubus coreanus Miquel is an unripe black raspberry native to eastern Asia [PMID:33147777]. It is distinct from Rubus occidentalis L., though the two are often confused in commercial products and scientific literature [PMID:25045891].

Traditional uses

It has been used as traditional oriental medicine and supplementary foods for centuries [PMID:33147777]. It is also used in traditional Asian medicine for antiobesity and antiosteoporosis treatment [PMID:22692333].

Active compounds

Key constituents include ellagic acid [PMID:33147777, 31509935], polyphenols [PMID:22924523], cyanidin-3-glucoside and gallic acid [PMID:26983677, 27275830], and sinapic acid [PMID:26387815]. Seed oils are rich in omega-6 fatty acids, specifically linoleic and gamma-linolenic acids [PMID:28899773, 17656085].

Mechanism of action

Mechanisms include inhibition of the TGF-β/Smad pathway to prevent kidney fibrosis [PMID:40354602], blocking PD-1/PD-L1 interaction to induce T cell activation and antitumor immunity [PMID:33147777], and increasing the expression of beige fat markers such as UCP1 and PGC1α to promote white adipose tissue browning [PMID:31509935]. It also improves cholinergic function by increasing acetylcholine levels and attenuating acetylcholinesterase activity [PMID:25121635].

Clinical evidence

Evidence BPrehypertension

A mixture of Hwangchil and unripe Bokbunja extract (HDR-2) was studied for safety and effectiveness on blood pressure [PMID:33739883]

Evidence BPostmenopausal Syndrome

An extract of R. coreanus Miq. and A. membranaceus Bunge was investigated for improving the Kupperman index (KI) score [PMID:35251207]

Evidence DKidney Fibrosis

Water-soluble extract (MN705) prevented kidney fibrosis in mouse models via TGF-β/Smad pathway inhibition [PMID:40354602]

Evidence DColorectal Cancer

Unripe extract (RCE) blocked PD-1/PD-L1 interaction and, when combined with oxaliplatin, reduced tumor growth in humanized PD-1 mice [PMID:33147777, 36139451]

Evidence DObesity

Water extract (BRWE) inhibited lipid accumulation in human mesenchymal stem cells and promoted browning of white adipose tissue in mice [PMID:31509935]

Evidence DViral Infections

Evidence summary

The majority of evidence is preclinical (animal models and in vitro studies) demonstrating diverse pharmacological activities. There are limited clinical trials (RCTs) investigating its use for prehypertension and postmenopausal syndrome.

PubMed sources

1.PMID: 40354602 (2025) — Rubus coreanus extract prevents kidney fibrosis through TGF-β/Smad pathway inhibition. · PloS one
2.PMID: 33147777 (2020) — Unripe Black Raspberry (Rubus coreanus Miquel) Extract and Its Constitute, Ellagic Acid Induces T Cell Activation and Antitumor Immunity by Blocking PD-1/PD-L1 Interaction. · Foods (Basel, Switzerland)
3.PMID: 25045891 (2014) — Mistaken identity: clarification of Rubus coreanus Miquel (Bokbunja). · Molecules (Basel, Switzerland)
4.PMID: 31509935 (2019) — Black Raspberry (Rubus coreanus Miquel) Promotes Browning of Preadipocytes and Inguinal White Adipose Tissue in Cold-Induced Mice. · Nutrients
5.PMID: 22924523 (2012) — Antiviral effects of black raspberry (Rubus coreanus) juice on foodborne viral surrogates.

Korean Raspberry

Sources & Citations

Calculate a safe dose of Korean Raspberry

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Frequently asked questions

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Evidence summary

PubMed sources

Government sources

Korean Raspberry

Sources & Citations

Calculate a safe dose of Korean Raspberry

Related Herbs

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Frequently asked questions

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Evidence summary

PubMed sources

Government sources