Fu Pen Zi (Rubus chingii): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Fu Pen Zi work in the body?

Fu Pen Zi (Rubus chingii) contains bioactive compounds including ellagic acid, tiliroside, kaempferol, quercetin, and anthocyanins that exert antioxidant and anti-inflammatory effects. In Traditional Chinese Medicine, it tonifies Kidney Yang and secures essence, helping regulate urinary function and reproductive health. The flavonoids and phenolic compounds support cellular protection through free radical scavenging activity, which may contribute to its vision-supporting properties. Evidence level: C.

Does Fu Pen Zi interact with any medications?

There are no well-documented drug interactions for Fu Pen Zi in current literature. However, due to its effects on urinary function and potential hormonal modulation, individuals taking diuretics, hormone therapies, or medications for sexual dysfunction should consult a healthcare provider before use. The herb's antioxidant compounds may theoretically affect how the liver metabolizes certain drugs. Always inform your practitioner about all supplements you are taking. Evidence level: C.

What is the recommended dosage for Fu Pen Zi?

The standard adult dosage for Fu Pen Zi is 6-12 grams of dried fruit daily, typically prepared as a decoction. Standardized extracts are commonly dosed at 500mg daily. In TCM practice, it is often combined with other kidney-tonifying herbs in formulations. Dosage may vary based on individual constitution and the specific condition being addressed. Consult a qualified herbalist for personalized dosing recommendations. Evidence level: Traditional.

Is Fu Pen Zi safe to take during pregnancy?

Fu Pen Zi is considered unsafe during pregnancy and should be avoided. In Traditional Chinese Medicine, this herb tonifies Kidney Yang and affects the reproductive system, which may pose risks during gestation. There is insufficient safety data regarding its use in pregnant women. Women who are pregnant, trying to conceive, or breastfeeding should not use Fu Pen Zi without explicit guidance from a qualified healthcare provider. Evidence level: Traditional.

What is Fu Pen Zi used for in traditional medicine?

Fu Pen Zi is traditionally used to address Kidney Yang deficiency symptoms including urinary frequency, urinary incontinence, and premature ejaculation. It is also prescribed for blurred vision and declining eyesight. The herb's astringent properties help secure essence in TCM theory, making it useful for conditions involving fluid leakage or reproductive weakness. Modern research indicates antioxidant activity, though clinical evidence remains limited. Evidence level: C.

What are the side effects of Fu Pen Zi?

Fu Pen Zi is generally well-tolerated with minimal reported side effects when used at recommended dosages. However, it is contraindicated in cases of urinary obstruction or excess conditions, as its astringent properties may worsen these conditions. Some individuals may experience mild digestive discomfort. Discontinue use if adverse reactions occur and consult a qualified healthcare provider. 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

Fu Pen Zi (Rubus chingii Hu) is a traditional Chinese food-medicine herb used primarily to treat kidney-related ailments and urinary dysfunction [PMID:36698464, PMID:32503732].

Background

Rubus chingii Hu, also known as Chinese Raspberry, is a woody perennial plant of the Rosaceae family distributed in China and Japan [PMID:36698464, PMID:32503732]. It is considered a dual-purpose resource with both nutraceutical and pharmaceutical value [PMID:38621934, PMID:38475465].

Traditional uses

It has been used for thousands of years in traditional Chinese medicine to treat impotence, premature ejaculation, enuresis, frequent urination, and other diseases associated with kidney deficiency [PMID:36698464, PMID:31379574, PMID:32503732].

Active compounds

Bioactive components include terpenoids (triterpenoids, diterpenoids), flavonoids, alkaloids, phenolic acids, polysaccharides, steroids, organic acids, and phenylpropanoids [PMID:36698464, PMID:31379574, PMID:32503732, PMID:37803568]. Specific identified compounds include rubusoside (in var. suavissimus), ellagic acid, rutin, and kaempferol-3-rutinoside [PMID:39764230, PMID:34146951, PMID:38237261].

Mechanism of action

Mechanisms include inhibition of the TXNIP/NLRP3 inflammasome signaling to improve insulin sensitivity [PMID:37489849], modulation of the PI3K/Akt pathway to ameliorate renal fibrosis [PMID:40056634], and inhibition of phosphodiesterase type 5A (PDE5A) activity by specific diterpene glycosides [PMID:38135092].

Clinical evidence

Evidence DPolycystic Ovary Syndrome (PCOS)

Alleviated hormone imbalance and insulin resistance while improving ovarian pathology in rat models [PMID:37489849]

Evidence DChronic Kidney Disease (CKD)

Ameliorated renal fibrosis in rats via the PI3K/Akt pathway [PMID:40056634]

Evidence DColitis

Pectin polysaccharide (RCHP-S) reduced enteritis symptoms in DSS-induced colitis mice by inhibiting inflammatory factors [PMID:35571944]

Evidence DObesity/Lipid Absorption

Pectic polysaccharide (RCP-2-3) reduced postprandial serum triglyceride accumulation and weight gain in mice [PMID:40441837]

Evidence DParkinson's Disease

Rubusoside mitigated neuroinflammation and cellular apoptosis in mice and cell lines [PMID:38237261]

Evidence DBacterial Infections

Flower extract showed growth impeding effects against multidrug-resistant E. coli, S. aureus, and K. pneumoniae [PMID:37654834]

Safety & adverse effects

Reviews mention the study of toxicity, but specific adverse effects are not detailed in the provided abstracts [PMID:31379574, PMID:32503732].

Evidence summary

The evidence is primarily based on in vitro studies and animal models (Level D) and literature reviews (Level C). There are no human clinical trials or meta-analyses provided.

PubMed sources

1.PMID: 36698464 (2022) — Bioactive components, pharmacological effects, and drug development of traditional herbal medicine Rubus chingii Hu (Fu-Pen-Zi). · Frontiers in nutrition
2.PMID: 31379574 (2019) — Rubus chingii Hu: A Review of the Phytochemistry and Pharmacology. · Frontiers in pharmacology
3.PMID: 32503732 (2020) — Rubus chingii Hu: an overview of botany, traditional uses, phytochemistry, and pharmacology. · Chinese journal of natural medicines
4.PMID: 39072206 (2024) — Chemical composition, pharmacological activity and development strategies of Rubus chingii: A review. · Chinese herbal medicines
5.PMID: 38621934 (2024) — [Comparative analysis of plastomes of Rubus chingii and R. chingii var. suavissimus]. · Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

Fu Pen Zi

Sources & Citations

Calculate a safe dose of Fu Pen Zi