# Arapaho Blackberry (Rubus fruticosus 'Arapaho')

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/arapaho-blackberry
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-31
**Evidence Score:** 2 / 10
**Category:** Fruit
**Also Known As:** Rubus fruticosus 'Arapaho', Arapaho thornless blackberry, Arkansas Arapaho blackberry, Thornless erect blackberry, Arapaho bramble, European blackberry cultivar Arapaho

## Overview

Arapaho blackberry (Rubus fruticosus 'Arapaho') is a thornless blackberry cultivar rich in anthocyanins, particularly cyanidin-3-glucoside. These anthocyanins demonstrate antiproliferative effects against cancer cells and [antimicrobial](/ingredients/condition/immune-support) activity through [oxidative stress](/ingredients/condition/antioxidant) modulation.

## Health Benefits

• May support cellular health through antiproliferative effects on cancer cells (preliminary evidence from in vitro studies on Caco-2 colon cancer cells)
• Demonstrates [antimicrobial](/ingredients/condition/immune-support) activity against common bacteria including S. aureus and E. coli (in vitro evidence only)
• Contains anthocyanins that reduced tumor proliferation in mice at 15 mg/kg (animal study evidence)
• Traditional use for blood sugar support in diabetes management (no human clinical evidence)
• Rich in phenolic compounds providing [antioxidant activity](/ingredients/condition/antioxidant) (based on chemical analysis, no human trials)

## Mechanism of Action

Arapaho blackberry's anthocyanins, primarily cyanidin-3-glucoside and delphinidin derivatives, modulate cellular signaling pathways by inhibiting [NF-κB](/ingredients/condition/inflammation) activation and reducing [oxidative stress](/ingredients/condition/antioxidant). These compounds interact with bacterial cell membranes, disrupting integrity and causing cell death in pathogenic bacteria. The antiproliferative effects occur through cell cycle arrest and apoptosis induction in cancer cell lines.

## Clinical Summary

Current evidence for Arapaho blackberry comes exclusively from in vitro laboratory studies. Research on Caco-2 colon cancer cells showed antiproliferative effects, though specific concentrations and statistical significance were not quantified in available data. [Antimicrobial](/ingredients/condition/immune-support) testing demonstrated activity against Staphylococcus aureus and Escherichia coli in laboratory conditions. No human clinical trials or animal studies have been conducted to validate these preliminary findings.

## Nutritional Profile

Arapaho Blackberry (Rubus fruticosus 'Arapaho') per 100g fresh weight: Macronutrients: Calories ~43 kcal, Carbohydrates ~9.6g, Dietary Fiber ~5.3g (soluble ~1.0g, insoluble ~4.3g), Sugars ~4.9g (glucose ~2.1g, fructose ~2.3g, sucrose ~0.5g), Protein ~1.4g, Fat ~0.5g (including trace omega-3 ALA ~94mg, omega-6 LA ~261mg). Micronutrients: Vitamin C ~21mg (23% DV; moderate bioavailability, sensitive to oxidation), Vitamin K1 ~19.8mcg (16% DV), Folate ~25mcg (6% DV), Vitamin E (alpha-tocopherol) ~1.17mg, Vitamin A (as beta-carotene) ~11mcg RAE, Manganese ~0.65mg (28% DV; one of highest mineral concentrations in this fruit), Copper ~0.165mg (18% DV), Magnesium ~20mg (5% DV), Potassium ~162mg (3% DV), Calcium ~29mg (2% DV), Iron ~0.62mg (3% DV; non-heme, bioavailability enhanced by co-consumed Vitamin C). Bioactive Compounds: Total anthocyanins ~82-150mg/100g fresh weight (primarily cyanidin-3-glucoside, cyanidin-3-rutinoside, and cyanidin-3-dioxalylglucoside; Arapaho cultivar noted for relatively high anthocyanin density among thornless blackberry varieties), Total polyphenols ~200-400mg GAE/100g, Ellagic acid ~1.5-5mg/100g (as free acid and ellagitannins including sanguiin H-6), Quercetin ~3.1mg/100g (as glycosides; bioavailability ~24-52% dependent on [gut microbiome](/ingredients/condition/gut-health) conversion), Chlorogenic acid ~4.8-8.6mg/100g, Kaempferol ~0.8mg/100g, Rutin ~1.2mg/100g, Catechins (epicatechin) ~2.3mg/100g, Total carotenoids (lutein + zeaxanthin) ~136mcg/100g. Bioavailability Notes: Anthocyanin bioavailability is relatively low (~1-5% absorbed intact) but gut microbiome metabolites (protocatechuic acid, phloroglucinol derivatives) are bioactive and more extensively absorbed; fiber content supports prebiotic effects and enhances colonic fermentation of polyphenols; seeds contain additional ellagitannins that require gut microbial hydrolysis to yield urolithins (urolithin A, B) which have demonstrated bioactivity; fat-soluble compounds (carotenoids, Vitamin K, Vitamin E) benefit from co-consumption with dietary fat.

## Dosage & Preparation

No clinically studied human dosages are available. Preclinical studies used leaf extracts at 10-100 μg/ml for in vitro testing and 15 mg/kg anthocyanins in animal models. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Arapaho blackberry is generally recognized as safe when consumed as a food, with no known serious adverse effects. Individuals with berry allergies should exercise caution as cross-reactivity may occur. No specific drug interactions have been documented, though the anthocyanin content may theoretically enhance anticoagulant effects. Pregnant and breastfeeding women can safely consume Arapaho blackberries as part of a normal diet.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses exist for Arapaho Blackberry or general R. fruticosus. Current evidence is limited to preclinical in vitro studies showing antiproliferative effects on Caco-2 colon cancer cells (n=6 independent experiments) and [antimicrobial](/ingredients/condition/immune-support) activity, plus one animal study using 15 mg/kg anthocyanins in tumor-bearing mice.

## Historical & Cultural Context

Rubus fruticosus has been used in European traditional medicine since ancient times for diabetes, diarrhea, [inflammation](/ingredients/condition/inflammation), and as an [immunity](/ingredients/condition/immune-support) booster. In Oman, it traditionally treats various disorders including infectious diseases, while fruits and leaves are employed in herbal systems for antidysentery and anticancer purposes.

## Synergistic Combinations

Bilberry, Elderberry, Vitamin C, Quercetin, Green Tea Extract

## Frequently Asked Questions

### What is the difference between Arapaho blackberry and regular blackberries?

Arapaho blackberry is a specific thornless cultivar developed for easier harvesting and consistent fruit production. It contains similar anthocyanin profiles to wild blackberries but may have slightly higher concentrations of cyanidin-3-glucoside due to selective breeding.

### How much anthocyanin does Arapaho blackberry contain?

Arapaho blackberries typically contain 100-300mg of anthocyanins per 100g of fresh fruit, with cyanidin-3-glucoside being the predominant compound. The exact concentration varies based on ripeness, growing conditions, and harvest timing.

### Can Arapaho blackberry supplements help prevent cancer?

While laboratory studies show antiproliferative effects against colon cancer cells, no human clinical trials have proven cancer prevention benefits. The preliminary in vitro evidence is not sufficient to make health claims about cancer prevention.

### Are there any side effects from eating Arapaho blackberries?

Arapaho blackberries are well-tolerated by most people with no significant side effects reported. Some individuals may experience mild digestive upset from high fiber content or allergic reactions if sensitive to berries.

### Do Arapaho blackberries interact with blood thinning medications?

No documented interactions exist between Arapaho blackberries and anticoagulant medications. However, the high anthocyanin content may theoretically enhance antiplatelet effects, so individuals on warfarin should monitor their intake and consult healthcare providers.

### What is the current state of clinical research on Arapaho blackberry for human health?

Most evidence for Arapaho blackberry comes from in vitro (test tube) and animal studies, including research on anthocyanin effects in mice and antimicrobial activity against bacteria like S. aureus and E. coli. Human clinical trials specifically on Arapaho blackberry are limited, so health claims should be considered preliminary rather than definitively proven. The antiproliferative effects observed in colon cancer cell studies (Caco-2 cells) are promising but have not yet been confirmed in human subjects.

### Can I get the same nutritional benefits from eating fresh Arapaho blackberries as from supplements?

Fresh Arapaho blackberries contain naturally high levels of anthocyanins and other polyphenols, making whole fruit consumption a food-based alternative to supplementation. However, supplement formulations may concentrate specific bioactive compounds, potentially delivering higher doses than practical amounts of fresh berries. The optimal intake level for health benefits in humans has not been established, making it unclear whether supplements or whole fruit consumption is more effective.

### Who should consider supplementing with Arapaho blackberry and who should avoid it?

Arapaho blackberry may be of interest to individuals seeking antioxidant support from anthocyanin-rich sources, though evidence in humans remains limited. People taking anticoagulant medications, those with berry allergies, or individuals pregnant or nursing should consult a healthcare provider before supplementing, as safety data in these populations is insufficient. Those with digestive sensitivities may want to start with low doses, as high polyphenol intake can affect gastrointestinal function.

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