# Jackalberry

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/jackalberry
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-15
**Evidence Score:** 4 / 10
**Category:** Fruit
**Also Known As:** Diospyros mespiliformis, African medlar, River ebony, Bush butter tree

## Overview

Jackalberry (Diospyros mespiliformis) is an African savannah fruit whose bioactivity derives from naphthoquinones (naphthazarin, juglone) and polyphenols that exhibit in vitro [antimicrobial](/ingredients/condition/immune-support) efficacy against Candida albicans and Mycobacterium tuberculosis with reported MICs of 3.1–6.3 mg/mL, alongside 24.56 mg vitamin C per 100 g of fresh fruit. A comprehensive review by Maroyi (2023) in Molecules (PMC10708241) systematically confirmed these antimicrobial, [antioxidant](/ingredients/condition/antioxidant), and anti-inflammatory pharmacological activities, attributing them to redox-cycling naphthoquinones that disrupt microbial membranes and suppress NF-κB-mediated [inflammatory pathway](/ingredients/condition/inflammation)s.

## Health Benefits

- **Supports [digestive health](/ingredients/condition/gut-health)**: via dietary fiber, enhancing bowel regularity and gut motility.
- **Exhibits antioxidant properties**: through tannins and flavonoids, helping to combat [oxidative stress](/ingredients/condition/antioxidant).
- **Possesses [antimicrobial](/ingredients/condition/immune-support) effects**: due to bioactive compounds, traditionally used to treat infections.
- **May reduce [inflammation](/ingredients/condition/inflammation),**: providing systemic relief and supporting joint comfort.
- **Promotes wound healing**: and soothes respiratory issues, as observed in traditional applications.

## Mechanism of Action

Jackalberry's primary bioactive naphthoquinones—naphthazarin (5,8-dihydroxy-1,4-naphthoquinone) and juglone (5-hydroxy-1,4-naphthoquinone)—undergo intracellular redox cycling, generating superoxide anions and other [reactive oxygen species](/ingredients/condition/antioxidant) (ROS) that peroxidize microbial cell membrane lipids, leading to loss of membrane integrity and cell death. These same quinone moieties inhibit the NF-κB signaling cascade by preventing IκBα phosphorylation and nuclear translocation of NF-κB p65, thereby downregulating expression of cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), and [pro-inflammatory cytokine](/ingredients/condition/inflammation)s such as TNF-α and IL-6. Polyphenolic constituents, including gallic acid, catechin, and ellagic acid, contribute additional antioxidant defense by chelating transition metal ions (Fe²⁺, Cu²⁺) and scavenging DPPH and ABTS radicals, with reported IC₅₀ values comparable to ascorbic acid standards. The synergistic interplay between naphthoquinone-driven oxidative stress against pathogens and polyphenol-mediated cytoprotection in host tissues underpins the fruit's dual [antimicrobial](/ingredients/condition/immune-support) and anti-inflammatory profile.

## Clinical Summary

No human clinical trials exist specifically for jackalberry, with evidence limited to pre-clinical animal and in vitro studies. Rodent studies show methanol stem bark extracts (50-100 mg/kg i.p.) produce significant [anti-inflammatory](/ingredients/condition/inflammation) and analgesic effects (p<0.05). In vitro [antimicrobial](/ingredients/condition/immune-support) testing demonstrates MICs of 3.1-6.3 mg/mL against pathogenic organisms including Candida albicans and Neisseria gonorrhoeae. Cytotoxicity studies using related Diospyros species show activity against Hep G2 and MCF-7 cancer cell lines, though human efficacy remains unvalidated.

## Nutritional Profile

- Dietary Fiber: Promotes digestive wellness and gut regularity.
- Vitamin C: Enhances [immune function](/ingredients/condition/immune-support) and supports skin integrity.
- Minerals: Calcium, iron, and magnesium, supporting [bone health](/ingredients/condition/bone-health), blood production, and muscle function.
- Bioactive Compounds: Including tannins, flavonoids, saponins, and alkaloids, providing [antioxidant](/ingredients/condition/antioxidant), [anti-inflammatory](/ingredients/condition/inflammation), and antimicrobial properties.

## Dosage & Preparation

- Common forms: Fresh fruit, dried fruit, flour, or herbal decoctions/infusions from leaves and bark.
- Preparation: Consume ripe fruit fresh, dry for storage, or grind into flour for baking. Leaves and bark are prepared as decoctions.
- Traditional use: Various tree parts used in folk medicine for fever, dysentery, pneumonia, and skin disorders.
- Dosage: Consume fresh fruit or flour as part of a balanced diet; for dried leaf infusion, 2-4 grams as needed.

## Safety & Drug Interactions

No formal human toxicology studies or clinical safety trials for Diospyros mespiliformis fruit have been published to date; however, traditional consumption across sub-Saharan Africa over centuries suggests general tolerability when eaten as a whole food in customary quantities. The naphthoquinone juglone is a known inhibitor of cytochrome P450 enzymes, particularly CYP3A4 and CYP1A2 in vitro, raising theoretical concerns about altered [metabolism](/ingredients/condition/weight-management) of drugs such as warfarin, cyclosporine, and certain statins when concentrated bark or root extracts are consumed. High tannin content may reduce bioavailability of iron supplements and certain antibiotics (e.g., tetracyclines, fluoroquinolones) through chelation in the gastrointestinal tract, so separation of dosing by at least two hours is advisable. Pregnant and breastfeeding women should exercise caution due to the absence of reproductive safety data, and individuals with hepatic impairment should consult a healthcare provider before using concentrated jackalberry supplements.

## Scientific Research

Maroyi (2023), publishing in Molecules (PMC10708241), conducted a systematic review cataloging the traditional uses, pharmacological activities, and phytochemistry of Diospyros mespiliformis across sub-Saharan Africa, confirming in vitro [antimicrobial](/ingredients/condition/immune-support) activity against Candida albicans, Mycobacterium tuberculosis, Staphylococcus aureus, and Escherichia coli with minimum inhibitory concentrations (MICs) ranging from 3.1 to 6.3 mg/mL. The same review documented significant [antioxidant](/ingredients/condition/antioxidant) capacity attributable to tannins, flavonoids, and naphthoquinones, as well as [anti-inflammatory](/ingredients/condition/inflammation) effects linked to suppression of pro-inflammatory mediators. Ethnobotanical surveys referenced within the review describe widespread traditional use of jackalberry bark, roots, and fruit for treating diarrhea, dysentery, wound infections, and respiratory ailments across at least 15 African countries. While no additional controlled human clinical trials were identified on PubMed, the breadth of in vitro and ethnopharmacological evidence strongly supports further investigation into standardized jackalberry extracts.

## Historical & Cultural Context

Revered across various African cultures, including Bantu, Zulu, and Tswana traditions, the Jackalberry tree has been a significant medicinal ally and cultural symbol for centuries. Its leaves, bark, and roots were traditionally used by healers for treating respiratory infections, dysentery, and external wounds. Often considered a sacred protective spirit tree, it is associated with fertility, [longevity](/ingredients/condition/longevity), and resilience.

## Synergistic Combinations

Role: Polyphenol/[antioxidant](/ingredients/condition/antioxidant) base
Intention: Immune & [Inflammation](/ingredients/condition/inflammation) | Gut & [Microbiome](/ingredients/condition/gut-health)
Primary Pairings: - Turmeric (Curcuma longa)
- Camu Camu (Myrciaria dubia)
- Ginger (Zingiber officinale)
- Maca Root (Lepidium meyenii)

## Frequently Asked Questions

### What are the main health benefits of jackalberry fruit?

Jackalberry fruit provides antimicrobial, antioxidant, and anti-inflammatory benefits attributable to its naphthoquinones (naphthazarin, juglone), tannins, and flavonoids. It contains approximately 24.56 mg of vitamin C per 100 g, supporting immune function, and its dietary fiber promotes digestive regularity. Traditional healers across sub-Saharan Africa have used it for centuries to treat infections, diarrhea, and respiratory ailments.

### Is jackalberry fruit safe to eat?

Jackalberry fruit has been consumed as a traditional food across at least 15 African countries for centuries, indicating general safety when eaten in normal dietary amounts. However, concentrated bark or root extracts contain higher levels of juglone, which may interfere with CYP3A4-metabolized medications. Pregnant women and those on prescription drugs should consult a healthcare provider before using jackalberry supplements.

### What does jackalberry taste like and how is it used?

Ripe jackalberry fruit has a sweet, slightly astringent flavor often compared to dates or dried figs, with a mealy-to-fleshy pulp surrounding a hard seed. In traditional African communities, the fruit is eaten fresh, dried for storage, or fermented into alcoholic beverages and vinegar. The bark and roots are separately prepared as decoctions for medicinal use against infections and gastrointestinal complaints.

### Why is the jackalberry tree important for African wildlife and ecosystems?

The jackalberry tree (Diospyros mespiliformis) is a keystone species in African savannahs, providing food for elephants, baboons, nyala, and numerous bird species that feed on its nutritious fruit. Its dense canopy offers critical shade and nesting habitat in semi-arid landscapes, while its deep root system stabilizes riverbank soils and prevents erosion. The tree's ecological role makes it a conservation priority in several southern and eastern African countries.

### What scientific research exists on jackalberry's medicinal properties?

The most comprehensive scientific review is by Maroyi (2023) in Molecules (PMC10708241), which systematically analyzed the ethnobotany, phytochemistry, and pharmacology of Diospyros mespiliformis, confirming in vitro antimicrobial activity against Candida albicans and Mycobacterium tuberculosis with MICs of 3.1–6.3 mg/mL. The review also documented antioxidant and anti-inflammatory effects from naphthoquinones and polyphenols. No controlled human clinical trials have yet been published, highlighting an important research gap.

### Does jackalberry interact with common medications or supplements?

Jackalberry contains tannins that may reduce the absorption of certain medications, particularly iron supplements and some antibiotics, so timing separation is recommended. If you take regular medications or supplements, consult a healthcare provider before adding jackalberry to ensure no adverse interactions occur. Most interactions are mild and manageable through proper dosing schedules.

### Is jackalberry safe during pregnancy and breastfeeding?

Limited safety data exists specifically for jackalberry during pregnancy and breastfeeding, so caution is advised during these periods. While traditional use suggests general safety, pregnant and nursing women should consult with a healthcare provider before supplementing. The high tannin content raises theoretical concerns about nutrient absorption that warrant medical guidance.

### What is the most effective form of jackalberry supplement—fresh fruit, powder, or extract?

Whole jackalberry fruit preserves the full spectrum of fiber, tannins, and flavonoids, making it the most nutrient-complete form. Standardized extracts concentrate bioactive compounds but may remove beneficial fiber components that support digestive health. Powder forms offer convenience and stability while retaining most nutrients, though fresh fruit provides superior digestive benefits due to intact fiber content.

## References

Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6617404/; https://www.sciencedirect.com/science/article/pii/S2221169116302513; https://pubmed.ncbi.nlm.nih.gov/31316323/
Sources: https://www.healthbenefitstimes.com/jackalberry/; https://en.wikipedia.org/wiki/Diospyros_mespiliformis; https://forestry.com/trees/jackalberry-tree/

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