# Rubus occidentalis (Black Raspberry)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/rubus-occidentalis
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-03
**Evidence Score:** 2 / 10
**Category:** Herb
**Also Known As:** Black raspberry, American black raspberry, Wild black raspberry, Blackcap raspberry, Blackcap, Purple raspberry, Thimbleberry

## Overview

Black raspberry (Rubus occidentalis) is a polyphenol-rich fruit whose primary bioactive compound, cyanidin-3-glucoside, exerts potent antioxidant and [anti-inflammatory](/ingredients/condition/inflammation) effects by scavenging [free radical](/ingredients/condition/antioxidant)s and modulating NF-κB signaling pathways. Its exceptionally high anthocyanin content (385–458.7 mg/100g fresh weight) distinguishes it from common red raspberries and supports its investigation in cellular health and cancer chemoprevention research.

## Health Benefits

• Potent [antioxidant activity](/ingredients/condition/antioxidant) demonstrated through DPPH and ABTS assays, with cyanidin-3-glucoside showing stronger effects than vitamins C/E or quercetin (in-vitro evidence)
• Rich anthocyanin content (385-458.7 mg/100g fresh weight) may support cellular health (preliminary evidence)
• High concentration of ellagic acid provides additional antioxidant properties (in-vitro evidence)
• Pre-matured extracts show rapid absorption in animals (Tmax 0.6h), suggesting potential bioavailability (animal studies only)
• Contains diverse phenolic compounds that may offer protective effects at molecular levels (review evidence, PMID: 26699735)

## Mechanism of Action

Cyanidin-3-glucoside and related anthocyanins in black raspberry directly scavenge [reactive oxygen species](/ingredients/condition/antioxidant) (ROS) and chelate transition metals, reducing oxidative stress measured via DPPH and ABTS assays at potency exceeding vitamins C and E. These anthocyanins also inhibit the NF-κB transcription factor pathway, downregulating [pro-inflammatory cytokine](/ingredients/condition/inflammation)s such as TNF-α, IL-6, and COX-2 expression in epithelial and immune cells. Additionally, ellagitannins present in black raspberry are metabolized by gut microbiota into urolithins, which further modulate mitophagy via AMPK activation and may contribute to antiproliferative effects in colon epithelial cells.

## Clinical Summary

Human clinical data on black raspberry specifically remains limited; most robust evidence comes from in-vitro cell studies and rodent models demonstrating dose-dependent suppression of tumor growth and oxidative biomarkers. A small Phase I clinical trial (n=20) in colorectal cancer patients using black raspberry powder (20–40g/day for 4 weeks) observed significant reductions in iNOS and [COX-2](/ingredients/condition/inflammation) expression in rectal mucosa biopsies. Pilot studies in healthy adults have reported modest reductions in plasma [oxidative stress](/ingredients/condition/antioxidant) markers (8-isoprostane) with 45g/day freeze-dried black raspberry consumption over 3 weeks, though sample sizes were small (n=10–25). Overall, evidence is preliminary and promising but insufficient to support definitive clinical health claims without larger randomized controlled trials.

## Nutritional Profile

Black raspberry (Rubus occidentalis) per 100g fresh weight: Calories ~57 kcal, Carbohydrates ~13.6g, Dietary fiber ~6.5g (high, supporting gut transit and [prebiotic](/ingredients/condition/gut-health) activity), Sugars ~4.4g, Protein ~1.5g, Fat ~0.7g. Key micronutrients: Vitamin C ~21mg (23% DV), Vitamin K ~7.8mcg, Folate ~21mcg, Potassium ~151mg, Manganese ~0.7mg, Magnesium ~22mg, Calcium ~22mg. Bioactive compounds: Anthocyanins 385-458.7mg/100g fresh weight (cyanidin-3-glucoside, cyanidin-3-rutinoside, cyanidin-3-sambubioside as primary fractions — notably higher than red raspberry or blueberry); Ellagic acid and ellagitannins (including sanguiin H-6) ~88-150mg/100g; Total polyphenols ~500-600mg GAE/100g; Quercetin glycosides ~8-12mg/100g; Kaempferol derivatives present in smaller quantities; Resveratrol trace amounts; Pterostilbene trace amounts. Bioavailability notes: Anthocyanin bioavailability is relatively low (1-2% systemic absorption) due to rapid [metabolism](/ingredients/condition/weight-management); however, colonic microbiota convert ellagitannins to urolithins (urolithin A, B), which demonstrate improved intestinal cell uptake and prolonged biological activity. Freeze-drying preserves 85-95% of anthocyanin content versus fresh; heat processing significantly degrades polyphenol concentration.

## Dosage & Preparation

No clinically studied human dosage ranges are available. Animal pharmacokinetic studies used 150 mg/kg of pre-matured black raspberry extract orally. Human dosages and standardization protocols have not been established. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Black raspberry consumed as a whole food or freeze-dried powder is generally well tolerated, with no serious adverse effects reported in short-term clinical studies at doses up to 45g/day of freeze-dried powder. Individuals taking anticoagulant medications such as warfarin should exercise caution, as the high polyphenol content may mildly potentiate antiplatelet activity and alter bleeding time. Those with known allergies to Rosaceae family fruits (strawberries, raspberries, peaches) may experience cross-reactive allergic responses. Safety during pregnancy and lactation has not been formally evaluated in clinical trials; food-level consumption is likely safe, but concentrated extracts or supplements should be avoided without medical guidance.

## Scientific Research

Current research is limited to preclinical data, with one review (PMID: 26699735) summarizing chemical composition and potential anticancer activity at cellular and molecular levels. No human clinical trials, RCTs, or meta-analyses were identified in the available research.

## Historical & Cultural Context

The research dossier provides no information on traditional or historical medicinal uses of black raspberry. Modern scientific interest focuses on its North American origin and emerging understanding of its bioactive compounds and potential health roles.

## Synergistic Combinations

Bilberry, Elderberry, Vitamin C, Quercetin, Resveratrol

## Frequently Asked Questions

### How much anthocyanin is in black raspberry compared to blueberry?

Black raspberry contains 385–458.7 mg of anthocyanins per 100g fresh weight, which is substantially higher than blueberries at approximately 163–270 mg/100g. The dominant anthocyanin in black raspberry is cyanidin-3-glucoside, followed by cyanidin-3-rutinoside and cyanidin-3-sambubioside, a profile distinct from the delphinidin-dominant blueberry.

### Can black raspberry help with colon cancer prevention?

Preclinical studies and a Phase I human trial (n=20 colorectal cancer patients) using 20–40g/day of black raspberry powder for 4 weeks found measurable reductions in pro-inflammatory and proliferative biomarkers iNOS and COX-2 in rectal mucosal biopsies. Ellagitannin-derived urolithins and anthocyanins are thought to suppress aberrant crypt foci formation and NF-κB-driven cell proliferation. However, this evidence is preliminary and black raspberry cannot be claimed as a cancer treatment or prevention agent without further Phase II/III RCT data.

### What is the difference between black raspberry and blackberry supplements?

Black raspberry (Rubus occidentalis) and blackberry (Rubus fruticosus) are botanically distinct species with different phytochemical profiles; black raspberry has a characteristically hollow core when picked and significantly higher cyanidin-3-glucoside concentrations. Blackberries tend to contain more cyanidin-3-glucoside as well but with a broader ellagitannin spectrum, while black raspberry is particularly studied for its dense freeze-dried powder form used in chemoprevention research. Consumers should verify species nomenclature on supplement labels, as the two are frequently mislabeled.

### What is the recommended dosage of black raspberry powder?

Clinical studies investigating black raspberry's biological effects have primarily used freeze-dried powder at doses of 20–45g per day, which concentrates the fresh fruit roughly 5- to 8-fold. This translates to an approximate cyanidin-3-glucoside delivery of 150–400 mg/day depending on harvest and processing conditions. No standardized therapeutic dosage has been officially established, and commercially available capsules typically provide 500mg–1g of extract, far below doses used in research, making direct comparisons difficult.

### Does cooking or processing destroy anthocyanins in black raspberry?

Anthocyanins in black raspberry are sensitive to heat, pH, and light; thermal processing above 70°C causes significant degradation of cyanidin-3-glucoside, with losses of 30–60% reported during juice pasteurization. Freeze-drying is the preferred preservation method used in clinical research, retaining over 85–90% of anthocyanin content compared to fresh fruit. Cold-pressed juices and raw consumption preserve polyphenol integrity best, while jams, baked goods, or boiled preparations substantially reduce bioactive anthocyanin concentrations.

### Is black raspberry safe to take with blood thinners like warfarin?

Black raspberry contains vitamin K and bioactive compounds that may have mild anticoagulant properties, which could theoretically interact with blood thinners like warfarin. Individuals taking anticoagulant medications should consult their healthcare provider before adding black raspberry supplements to ensure safe concurrent use. While dietary amounts of black raspberry are generally considered safe, supplemental doses warrant medical oversight.

### Can I get therapeutic levels of black raspberry anthocyanins from eating fresh berries, or do I need a supplement?

Fresh black raspberries contain 385–458.7 mg of anthocyanins per 100g and would require consuming approximately 150–200g daily (about 1.5–2 cups) to match typical supplement dosages. Most people find it difficult to consistently achieve these quantities through diet alone, particularly during off-season months, making supplements a practical alternative. However, whole berry consumption provides additional fiber and nutrients not always present in extracts.

### What makes black raspberry's antioxidant activity stronger than other antioxidants like vitamin E?

Black raspberry's superior antioxidant potency in laboratory assays (DPPH and ABTS) is primarily attributed to its high concentration of anthocyanins, particularly cyanidin-3-glucoside, combined with ellagic acid—compounds that are structurally optimized for free radical scavenging. In vitro studies demonstrate that these polyphenols outperform standard antioxidants like vitamins C and E in specific oxidative stress models. However, these in-vitro results have not yet been conclusively translated to measurable clinical benefits in human studies.

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