Ribes nigrum (Ribes nigrum): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does blackcurrant work for inflammation?

Blackcurrant (Ribes nigrum) reduces inflammation primarily through its high content of anthocyanins and gamma-linolenic acid (GLA). These compounds inhibit cyclooxygenase (COX) enzymes, specifically COX-1 and COX-2, which are responsible for producing pro-inflammatory prostaglandins. Additionally, the antioxidants quercetin and myricetin scavenge free radicals, reducing oxidative stress markers. This dual mechanism supports its traditional use for joint pain and immune modulation. Evidence level: C.

Does blackcurrant interact with blood thinners?

Yes, blackcurrant may interact with anticoagulant and antiplatelet medications like warfarin or aspirin. The gamma-linolenic acid (GLA) in blackcurrant seed oil possesses mild anticoagulant properties, which can theoretically increase the risk of bleeding or bruising when combined with these drugs. Patients taking blood thinners should consult a healthcare provider before adding blackcurrant supplements to their regimen to ensure safety. Evidence level: C.

What is the recommended dosage for blackcurrant leaf?

For medicinal purposes, the standard adult dosage for blackcurrant leaf is typically 3 to 6 grams daily, often taken as a tea or in capsule form. Alternatively, blackcurrant seed oil is commonly dosed at 500 mg per day for inflammatory conditions. Dosages may vary based on the specific formulation and concentration of active compounds like anthocyanins. Always follow product label instructions or consult a medical herbalist. Evidence level: C.

Is blackcurrant safe during pregnancy?

Blackcurrant is generally considered safe during pregnancy when consumed in food amounts. However, regarding medicinal supplements, there is limited high-quality clinical data specifically for pregnant populations. While the fruit is a rich source of vitamin C, concentrated seed oil or leaf extracts should be used with caution. It is recommended that pregnant or breastfeeding women consult a healthcare professional before using therapeutic doses. Evidence level: C.

Can blackcurrant help with joint pain?

Yes, blackcurrant is traditionally used to alleviate joint pain and stiffness. The anthocyanins and gamma-linolenic acid (GLA) found in the berries and seeds exhibit anti-inflammatory effects that may help reduce symptoms associated with rheumatoid arthritis and general joint discomfort. Some preliminary evidence suggests improvement in joint mobility, though more robust clinical trials are needed to confirm these benefits definitively. Evidence level: C.

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 29 PubMed articles · model: gemma4:31b

Summary

Ribes nigrum (blackcurrant) is a perennial shrub known for its potent antioxidant, anti-inflammatory, and antimicrobial properties [PMID:22673662].

Background

Blackcurrant (Ribes nigrum L.) is a small, perennial shrub native to northern Asia and central Europe, now cultivated globally, including in the United States [PMID:22673662]. It belongs to the Grossulariaceae family [PMID:37842068].

Traditional uses

It has been used anecdotally in traditional herbal medicine [PMID:22673662], and its leaves were used in folk medicine as a panacea for various diseases [PMID:32059465].

Active compounds

Key constituents include anthocyanins (specifically delphinidin-3-O-glucoside, delphinidin-3-O-rutinoside, cyanidin-3-O-glucoside, and cyanidin-3-O-rutinoside), flavonols, phenolic acids, and polyunsaturated fatty acids [PMID:22673662]. Seed oil contains alpha and gamma-linolenic acid, proanthocyanidins, flavonoids, and vitamin C [PMID:29999722]. Other identified compounds include luteolin, quercetin, apigenin, and kaempferol [PMID:37110805].

Mechanism of action

Black currant polysaccharide (CAPS) stimulates dendritic cells via Myd88-dependent TLR4 signaling, activating Th1-type cytokine release [PMID:29038769]. It may exert anti-inflammatory effects by repressing M1 polarization of macrophages [PMID:31035378] and protect against alcoholic liver disease by promoting FGF21 expression via the liver-brain axis [PMID:40928374]. In cancer cells, it may induce apoptosis through MAPK- and PI3K/Akt-mediated mitochondrial pathways [PMID:27007806].

Clinical evidence

Evidence CAtopic dermatitis in infants

Supplementation of mothers with black currant seed oil during pregnancy and exclusive breastfeeding decreases the rate of atopic dermatitis in breastfed infants [PMID:29999722].

Evidence DInflammation (Animal Model)

Hydroalcoholic extract of leaves showed significant anti-inflammatory activity in rat paw oedema, comparable to indomethacin [PMID:2615431].

Evidence DObesity-induced NASH (Animal Model)

Consumption of whole blackcurrant powder markedly decreased liver weights, triglycerides, and M1 macrophage infiltration in mice [PMID:30569636].

Evidence DMemory Impairment (Animal Model)

Blackcurrant prevented learning and memory deficits induced by scopolamine in mice by preventing the increase of acetylcholinesterase and butyrylcholinesterase activities [PMID:39262284].

Evidence DHypertension (Animal Model)

Intravenous injection of black currant juice induced a dose-dependent decrease in arterial blood pressure and heart rate in rabbits [PMID:27564244].

Evidence D

Safety & adverse effects

Black currant seed oil is generally well tolerated [PMID:29999722].

Pregnancy & lactation

Supplementation of mothers during pregnancy and exclusive breastfeeding with black currant seed oil has been associated with a decreased rate of atopic dermatitis in infants [PMID:29999722].

Evidence summary

The majority of evidence is derived from in vitro studies and animal models (Level D), with limited review-level data (Level C) regarding maternal supplementation. No human RCTs or meta-analyses were provided.

PubMed sources

1.PMID: 29999722 (2006) — The Blackcurrant. · Canadian Medical Association journal
2.PMID: 22673662 (2012) — The health benefits of blackcurrants. · Food & function
3.PMID: 29038769 (2017) — Polysaccharide from black currant (Ribes nigrum L.) stimulates dendritic cells through TLR4 signaling. · Bioscience of microbiota, food and health
4.PMID: 37842068 (2023) — Complete chloroplast genome assembly and phylogenetic analysis of blackcurrant (Ribes nigrum), red and white currant (Ribes rubrum), and gooseberry (Ribes uva-crispa) provide new insights into the phylogeny of Grossulariaceae. · PeerJ
5.PMID: 36838736 (2023) — Reduction of Nitrite in Canned Pork through the Application of Black Currant (Ribes nigrum L.) Leaves Extract. · Molecules (Basel, Switzerland)

Ribes nigrum

Sources & Citations

Calculate a safe dose of Ribes nigrum