# Mutamba Bark

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/mutamba-bark
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-15
**Evidence Score:** 4 / 10
**Category:** Bark
**Also Known As:** Guazuma ulmifolia, guácimo, guazuma, West Indian elm

## Overview

Mutamba bark from Guazuma ulmifolia contains high concentrations of proanthocyanidins that inhibit angiotensin II binding at AT1 receptors and block cholera toxin-induced chloride secretion. These condensed tannins, particularly procyanidin B-2 and C-1, demonstrate antihypertensive, antidiarrheal, and protein kinase C inhibitory activities.

## Health Benefits

- **Supports [liver detox](/ingredients/condition/detox)ification**: by aiding in the elimination of toxins.
- **Enhances immune defense**: through its antimicrobial and [immunomodulatory](/ingredients/condition/immune-support) properties.
- **Improves circulation by**: supporting vascular integrity and blood flow.
- **Reduces inflammation via**: its rich content of [anti-inflammatory](/ingredients/condition/inflammation) compounds.
- **Nourishes skin and**: hair, promoting their health and vitality.
- **Promotes respiratory wellness**: by soothing the respiratory tract.

## Mechanism of Action

Proanthocyanidins in mutamba bark, including procyanidin B-2 and C-1, inhibit [³H]-angiotensin II binding to human AT1 receptors, contributing to antihypertensive effects. These same compounds block cholera toxin-induced chloride secretion in rabbit colon tissue and inhibit protein kinase C activity. Additional phenolic compounds like epigallocatechin gallate (5.99 µg/mL in ethanolic extracts) provide [antioxidant activity](/ingredients/condition/antioxidant) through DPPH and hydroxyl radical scavenging.

## Clinical Summary

Current evidence for mutamba bark is limited to preclinical in vitro and animal studies, with no published human clinical trials documented in scientific literature. Laboratory studies show ethanolic bark extract at 40 µg/mL completely inhibited cholera toxin-induced secretion in rabbit colon models. Traditional use data indicates healers prescribe bark decoctions twice daily (97.2% oral administration) for dysentery and respiratory conditions. Quantified HPLC analysis confirms presence of bioactive phenolics, but human efficacy and optimal dosing require clinical validation.

## Nutritional Profile

- Minerals: Magnesium, Potassium, Zinc
- Phytochemicals: Tannins, Flavonoids (quercetin, catechins), Ellagic acid, Proanthocyanidins, Plant sterols, Saponins, Bitter compounds

## Dosage & Preparation

- Common forms: Decoctions, powdered extracts, tinctures, topical poultices, hair tonics.
- Dosage: 500–1000 mg powdered extract daily.
- Traditional application: Used in poultices for skin healing and as hair tonics.

## Safety & Drug Interactions

Mutamba bark extracts demonstrate low toxicity in phytochemical screens, though comprehensive safety data is lacking. Proanthocyanidins may theoretically interact with AT1 receptor antagonists like losartan due to competitive receptor binding mechanisms. Tannin content could reduce absorption of alkaloid medications and peptide drugs when taken concurrently. Use should be avoided during pregnancy and lactation due to insufficient safety data, and cyanogenic heterosides present theoretical hydrogen cyanide risk at high doses.

## Scientific Research

Emerging research, including in vitro and animal studies, indicates Mutamba Bark's potential for [antimicrobial](/ingredients/condition/immune-support), [anti-inflammatory](/ingredients/condition/inflammation), and [hepatoprotective](/ingredients/condition/detox) effects. Further clinical studies are necessary to validate these traditional uses and determine optimal human dosages.

## Historical & Cultural Context

Mutamba Bark (*Guazuma ulmifolia*) has been a cornerstone in Amazonian and Mesoamerican herbalism for centuries. Traditionally used for respiratory, immune, liver, and skin conditions, its applications are now being explored for [antimicrobial](/ingredients/condition/immune-support), [cardiovascular](/ingredients/condition/heart-health), and detoxifying effects.

## Synergistic Combinations

Role: Bark botanical
Intention: Detox & Liver | Immune & [Inflammation](/ingredients/condition/inflammation)
Primary Pairings: - Turmeric (Curcuma longa)
- Ginger (Zingiber officinale)
- Ashwagandha (Withania somnifera)
- Camu Camu (Myrciaria dubia)

## Frequently Asked Questions

### What are the main active compounds in mutamba bark?

Mutamba bark contains primarily proanthocyanidins including procyanidin B-2 and C-1, along with quantified phenolics like epigallocatechin gallate (5.99 µg/mL) and epicatechin (3.29 µg/mL). These condensed tannins are responsible for most of the bark's bioactive properties.

### How does mutamba bark work for blood pressure?

Proanthocyanidins in mutamba bark inhibit angiotensin II binding to human AT1 receptors in laboratory studies. This mechanism could theoretically support cardiovascular health, though human clinical trials are needed to confirm antihypertensive effects.

### Is mutamba bark safe to take with medications?

Mutamba bark may interact with AT1 receptor blockers like losartan due to competitive receptor binding. The high tannin content could also reduce absorption of alkaloid and peptide medications when taken together.

### What is the traditional dosage of mutamba bark?

Traditional healers typically prescribe mutamba bark as a decoction taken twice daily for digestive and respiratory conditions. However, optimal human dosages have not been established through clinical research.

### Has mutamba bark been studied in human trials?

No human clinical trials for mutamba bark are documented in current scientific literature. Evidence comes from in vitro studies, animal models, and traditional use reports, requiring clinical validation for therapeutic claims.

### Can mutamba bark help with skin conditions like acne or eczema?

Mutamba bark may support skin health through its anti-inflammatory and antimicrobial properties, which could help reduce irritation and bacterial overgrowth associated with acne and eczema. Its traditional use for skin nourishment is supported by these active compounds, though clinical evidence specific to these conditions remains limited. Results may vary depending on the severity of the condition and individual skin sensitivity.

### Who should avoid taking mutamba bark supplements?

Individuals with known allergies to plants in the Malvaceae family should avoid mutamba bark, as cross-reactivity is possible. Pregnant and nursing women should consult healthcare providers before use, as safety data in these populations is insufficient. Those with existing liver conditions should seek medical guidance before supplementation, given the herb's role in hepatic function.

### How does mutamba bark compare to other traditional immune-supporting barks like pau d'arco?

Both mutamba bark and pau d'arco are traditional South American barks used to support immune function, but they contain different active compounds and mechanisms—mutamba is noted for antimicrobial and immunomodulatory properties while pau d'arco is known for its antifungal and anti-inflammatory effects. Mutamba has broader applications for liver support and circulation, whereas pau d'arco is traditionally favored for fungal challenges. The choice between them depends on individual health goals and whether liver support or antifungal action is the priority.

## References

Sources: https://pubmed.ncbi.nlm.nih.gov/34497832; https://www.sciencedirect.com/science/article/pii/S1756464620312549; https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7589236/

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