Dioscorea Polystachya (Dioscorea polystachya): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does Dioscorea polystachya work in the body?

Dioscorea polystachya contains diosgenin, allantoin, and mucilage which contribute to its therapeutic effects. Diosgenin has anti-inflammatory properties and may influence steroid hormone pathways. The mucilage content provides demulcent effects, coating and soothing mucous membranes in the digestive tract. Allantoin promotes cell proliferation and tissue healing. These compounds work synergistically to support digestive function and respiratory health (Evidence Level C, Traditional use).

Does Chinese yam interact with any medications?

There are no documented significant drug interactions for Dioscorea polystachya. However, due to its mucilage content, it may theoretically affect the absorption of oral medications if taken simultaneously. As a precaution, separate consumption of Chinese yam from medications by at least 1-2 hours. Patients taking hormone-related medications should consult a healthcare provider, as diosgenin can influence steroid hormone pathways. Always inform your healthcare provider about all supplements you are taking.

What is the recommended dosage for Dioscorea polystachya?

As a food, Dioscorea polystachya can be consumed freely in normal culinary amounts. For therapeutic use as a dried herb, the typical dosage is 15-30g daily prepared as a decoction. The fresh tuber can be eaten as food in larger quantities. Traditional Chinese Medicine practitioners may adjust dosages based on individual constitution and condition. Start with lower doses to assess tolerance, as excessive consumption may cause bloating.

Is Chinese yam safe during pregnancy and breastfeeding?

Dioscorea polystachya is considered safe during pregnancy and breastfeeding when consumed in normal food amounts. It has been used traditionally as a nutritive food medicine in China and Japan for centuries. The herb is regarded as a gentle tonic that supports both mother and fetus. However, concentrated therapeutic doses should be discussed with a qualified healthcare provider. There are no documented adverse effects in pregnancy (Evidence Level C, Traditional use).

What are the health benefits of Chinese yam?

Dioscorea polystachya is used in Traditional Chinese Medicine to tonify the spleen and lungs, stabilize kidney essence, and support digestive function. It acts as a nutritive food medicine, providing nourishment while addressing digestive weakness. The mucilage content soothes inflamed mucous membranes, making it useful for respiratory and gastrointestinal support. Regular consumption may improve energy, appetite, and overall vitality (Evidence Level C, Traditional use).

What are the side effects of Dioscorea polystachya?

Dioscorea polystachya is generally well-tolerated with minimal side effects. The most commonly reported issue is bloating, particularly when consumed in excessive amounts. This is due to its starch and mucilage content. Individuals with sensitive digestion should start with small amounts and increase gradually. There are no significant contraindications documented. If you experience persistent digestive discomfort, reduce your intake and consult a healthcare provider.

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Dioscorea polystachya, known as Chinese yam, is a tuber crop used in East Asia as both a functional food and a traditional medicinal herb [PMID:32959173, PMID:34357058].

Contexte

Dioscorea polystachya is a species of flowering plant that develops underground tubers and is cultivated in temperate regions, particularly in East Asia [PMID:37215221, PMID:32959173]. It is considered an underutilized orphan crop with potential for enhancing food security [PMID:37215221, PMID:34357058].

Usages traditionnels

It has been used for centuries in traditional Chinese medicine and East Asian herbal medicine to treat diabetes, diarrhea, asthma, and to strengthen bones and treat musculoskeletal conditions [PMID:31730974, PMID:41173080].

Composés actifs

Bioactive components include non-starch polysaccharides (mucilage polysaccharides), steroidal sapogenins such as diosgenin, the storage protein dioscorin, resistant starches, and metabolites such as dehydroepiandrosterone, allantoin, flavonoids, and gamma-aminobutyric acid [PMID:32959173, PMID:33295037, PMID:36427159].

Mécanisme d'action

Chinese yam polysaccharides may modulate the gut microbiota and metabolites to enhance immunotherapy [PMID:40267869], upregulate interleukin-10 to exert anti-inflammatory effects [PMID:40498533], and protect renal function by mitigating interstitial fibrosis [PMID:39603894]. A specific protein (DP1) from D. polystachya residue is reported to alleviate erectile dysfunction via inhibition of the TXNIP/NLRP3 pathway [PMID:41319771].

Preuves cliniques

Preuve AType II Diabetes Mellitus (Glycaemia)

Yam and its extracts have been identified as beneficial in controlling glycaemia in rodent models [PMID:34521490].

Preuve DOsteoporosis/Bone Loss

D. polystachya root extract attenuated osteoclastogenesis and ovariectomy-induced bone loss in rats [PMID:41173080].

Preuve DUlcerative Colitis

Chinese yam polysaccharides (CYP/CYP-A) reduced colon shortening, mitigated crypt architectural distortion, and suppressed pro-inflammatory cytokines in mice [PMID:40498533, PMID:40360104].

Preuve DColorectal Cancer

Chinese yam polysaccharide synergistically inhibited tumour growth when combined with αPD-1 monoclonal antibody in xenograft models [PMID:40267869].

Preuve DCisplatin-induced Renal Interstitial Fibrosis

Chinese yam polysaccharide (SYDT) significantly protected renal function and alleviated fibrosis in rats [PMID:39603894].

Preuve DErectile Dysfunction

Synthèse des preuves

The evidence is primarily based on animal models (rodents) and in vitro studies (Level D), with one systematic review of rodent studies regarding glycaemia (Level A). There is a lack of human clinical trial data in the provided abstracts.

Sources PubMed

1.PMID: 39303509 (2024) — Shenqi Pill alleviates acetaminophen-induced liver injury: a comprehensive strategy of network pharmacology and spectrum-effect relationship reveals mechanisms and active components. · Phytomedicine : international journal of phytotherapy and phytopharmacology
2.PMID: 40267869 (2025) — Chinese yam polysaccharide enhances anti-PD-1 immunotherapy in colorectal cancer through alterations in the gut microbiota and metabolites. · International journal of biological macromolecules
3.PMID: 38790726 (2024) — A Frontier Review of Nutraceutical Chinese Yam. · Foods (Basel, Switzerland)
4.PMID: 37215221 (2023) — Transcriptomic analysis of Chinese yam (Dioscorea polystachya Turcz.) variants indicates brassinosteroid involvement in tuber development. · Frontiers in nutrition
5.PMID: 34521490 (2022)

Dioscorea Polystachya

Sources et citations

Calculer une dose sûre de Dioscorea Polystachya

Vigna unguiculata

Acacia

Hawaiian Mamaki

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Dioscorea Polystachya

Sources et citations

Calculer une dose sûre de Dioscorea Polystachya

Plantes associées

Vigna unguiculata

Acacia

Hawaiian Mamaki

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Synthèse des preuves

Sources PubMed

Sources gouvernementales