# Cassava Leaves (Manihot esculenta)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/cassava-leaves
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-24
**Evidence Score:** 2 / 10
**Category:** Vegetable
**Also Known As:** Manihot esculenta, Yuca leaves, Tapioca leaves, Manioc leaves, Brazilian arrowroot leaves, Cassava foliage, Singkong leaves, Mandioca leaves

## Overview

Cassava leaves (Manihot esculenta) are rich in flavonoids, polyphenols, and rutin, which exert [anti-inflammatory](/ingredients/condition/inflammation) and [hepatoprotective](/ingredients/condition/detox) effects primarily by inhibiting pro-inflammatory enzymes like COX and neutralizing [reactive oxygen species](/ingredients/condition/antioxidant). The leaves also contain significant levels of protein, beta-carotene, and cyanogenic glucosides that require proper processing to reduce toxicity before consumption.

## Health Benefits

• [Anti-inflammatory](/ingredients/condition/inflammation) effects: Preclinical studies show cassava leaf extract inhibits carrageenan-induced paw edema and xylene-induced ear swelling more effectively than indomethacin (10 mg/kg) in rodent models
• [Hepatoprotective](/ingredients/condition/detox) properties: Animal studies demonstrate ethanol-water extracted cassava leaf flavonoids (100-400 mg/kg) reduce ALT and AST levels in CCl4-induced liver damage in mice
• Wound healing support: Topical application enhanced [collagen synthesis](/ingredients/condition/skin-health) and fibroblast proliferation in diabetic rat wound models
• [Neuroprotective](/ingredients/condition/cognitive) potential: PMID 37948133 notes prevention of Aβ-related memory deficits in Alzheimer's disease models with leaf extract pretreatment (preclinical evidence only)
• [Antioxidant activity](/ingredients/condition/antioxidant): In vitro and animal studies show reduction of oxidative stress markers through flavonoid and phenolic compound content

## Mechanism of Action

Cassava leaf flavonoids, particularly rutin and quercetin derivatives, inhibit cyclooxygenase (COX-1 and COX-2) enzymes and suppress NF-κB signaling, reducing downstream synthesis of prostaglandins and [pro-inflammatory cytokine](/ingredients/condition/inflammation)s such as TNF-α and IL-6. The polyphenolic constituents scavenge [reactive oxygen species](/ingredients/condition/antioxidant) and upregulate endogenous antioxidant enzymes including superoxide dismutase (SOD) and catalase, protecting hepatocytes from oxidative stress-induced apoptosis. Additionally, cyanogenic glucosides such as linamarin and lotaustralin are metabolized to hydrogen cyanide upon improper preparation, necessitating heat and water processing to hydrolyze these compounds to safe levels.

## Clinical Summary

The majority of evidence for cassava leaf benefits comes from preclinical rodent studies; ethanol-water extracts have demonstrated inhibition of carrageenan-induced paw edema and xylene-induced ear swelling at doses outperforming indomethacin at 10 mg/kg in mouse models. Animal [hepatoprotect](/ingredients/condition/detox)ion studies show that cassava leaf extract significantly reduces serum ALT and AST levels in paracetamol-induced liver injury models, suggesting preservation of hepatocyte membrane integrity. Human clinical trials are largely absent from the peer-reviewed literature, limiting the ability to extrapolate preclinical findings to therapeutic dosing in people. Nutritional studies in sub-Saharan African and Southeast Asian populations document cassava leaves as a meaningful dietary source of protein (up to 7g/100g fresh weight) and beta-carotene, though bioavailability data remain sparse.

## Nutritional Profile

Per 100 g of raw cassava leaves: Protein 6.8–7.0 g (notably high for a leafy vegetable; contains all essential amino acids, though methionine is limiting); Fat 1.3–1.8 g; Carbohydrates 13–15 g; Dietary fiber 2.4–4.0 g; Energy ~91–100 kcal. Vitamins: Vitamin C 60–275 mg (highly variable by cultivar and preparation; significant losses of 40–70% occur during boiling/pounding required to remove cyanogenic glycosides); Vitamin A as β-carotene 8,300–11,000 µg (retinol activity equivalent ~830–1,100 µg RAE; bioavailability enhanced by co-consumption with dietary fat); Vitamin B1 (thiamine) 0.16–0.25 mg; Vitamin B2 (riboflavin) 0.32–0.60 mg; Niacin (B3) 1.5–2.4 mg; Folate (B9) ~120–165 µg; Vitamin K ~108 µg. Minerals: Calcium 160–303 mg (bioavailability reduced by co-present oxalates); Iron 3.6–7.6 mg (predominantly non-heme; absorption improved by concurrent vitamin C intake); Magnesium 51–68 mg; Phosphorus 68–112 mg; Potassium 350–520 mg; Zinc 1.1–2.0 mg; Manganese 3.0–4.2 mg. Bioactive compounds: Cyanogenic glycosides (linamarin 80–95% and lotaustralin 5–20% of total; raw leaf concentration 200–1,340 mg HCN equivalents/kg dry weight — proper processing via crushing, soaking, and prolonged boiling reduces to safe levels <10 mg/kg); Flavonoids including rutin (quercetin-3-O-rutinoside, 12–38 mg/100 g dry weight), kaempferol glycosides, and apigenin derivatives; Phenolic acids including chlorogenic acid, caffeic acid, and ferulic acid (total phenolics ~1,200–2,800 mg GAE/100 g dry weight); Condensed tannins 0.4–2.5 g/100 g dry weight (reduce protein digestibility by 5–15%); Saponins (triterpenoid type, moderate concentrations); Phytic acid 0.3–0.6 g/100 g (chelates divalent minerals, reducing Zn and Fe bioavailability by ~20–40%); Oxalates 120–260 mg/100 g fresh weight. The leaves are considered one of the most protein-dense tropical leafy vegetables; lysine content is particularly high (~5.5–7.0 g/100 g protein), making them complementary to cereal-based diets. Essential fatty acid profile includes α-linolenic acid (omega-3) constituting ~40–55% of total fatty acids, though absolute lipid content is low. Prolonged boiling (the standard preparation method to ensure cyanide detoxification) reduces vitamin C by 50–70%, β-carotene by 15–30%, and soluble minerals by 20–40%, but is necessary for safe consumption.

## Dosage & Preparation

Preclinical studies used: ethanol-water flavonoid extract at 100-400 mg/kg body weight orally in mice; boiled water extract at 100-400 mg/kg orally or 1-4% w/w topically in rats/mice; ethanol extracts at 200 µg/mL in vitro. No human dosage data available. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Raw or improperly processed cassava leaves contain cyanogenic glucosides (linamarin, lotaustralin) that release hydrogen cyanide upon hydrolysis; chronic low-level cyanide exposure is linked to konzo, an irreversible spastic paralysis, particularly in malnourished populations. Boiling, soaking, or fermenting leaves significantly reduces cyanide content to below the WHO threshold of 10 mg HCN equivalents per 100g fresh weight. Cassava leaf extracts may potentiate the effects of anticoagulant drugs such as warfarin due to rutin's vitamin K antagonism activity, and individuals on hepatotoxic medications should exercise caution given the extract's influence on liver enzyme [metabolism](/ingredients/condition/weight-management). Pregnant and breastfeeding women should avoid concentrated extracts due to insufficient safety data, though traditionally prepared cooked leaves consumed as food are generally considered safe in moderate dietary amounts.

## Scientific Research

Current evidence is limited to preclinical in vivo animal studies and in vitro assays, with no human clinical trials, randomized controlled trials, or meta-analyses identified. Studies include [hepatoprotect](/ingredients/condition/detox)ion in ICR mice (18-22g), [anti-inflammatory](/ingredients/condition/inflammation) effects in Sprague-Dawley rats (150-200g), and neuroprotection in Alzheimer's disease models (PMID 37948133).

## Historical & Cultural Context

Cassava leaves have been used in traditional medicine systems of tropical regions, particularly in African and Asian folk medicine, for their nutritional value and treatment of [inflammation](/ingredients/condition/inflammation), wounds, liver issues, and infections. The phytochemical properties support their historical role in prophylaxis against [oxidative stress](/ingredients/condition/antioxidant) and [immunomodulat](/ingredients/condition/immune-support)ion.

## Synergistic Combinations

Milk thistle, turmeric, green tea extract, alpha-lipoic acid, quercetin

## Frequently Asked Questions

### Are cassava leaves safe to eat raw?

No, raw cassava leaves contain cyanogenic glucosides—primarily linamarin—that enzymatically release hydrogen cyanide when cell walls are disrupted. Thorough boiling or fermentation is required to hydrolyze these compounds below the WHO safety threshold of 10 mg HCN equivalents per 100g, making cooked leaves safe for regular consumption.

### What nutrients are found in cassava leaves?

Cassava leaves are a surprisingly rich source of plant protein (approximately 5–7g per 100g fresh weight), beta-carotene (provitamin A), vitamin C, iron, and calcium, making them nutritionally superior to the cassava root. They also contain significant polyphenols including rutin, quercetin, and kaempferol, which contribute to their antioxidant capacity.

### Can cassava leaves reduce inflammation?

Preclinical studies in rodent models indicate that cassava leaf ethanol-water extracts inhibit acute inflammation, with results showing greater reduction of carrageenan-induced paw edema than indomethacin at 10 mg/kg. This activity is attributed to flavonoids like rutin and quercetin suppressing COX enzyme activity and NF-κB-mediated cytokine production, though no human clinical trials have yet confirmed these effects.

### Do cassava leaves protect the liver?

Animal research demonstrates that cassava leaf extract reduces elevated serum liver enzymes (ALT and AST) in paracetamol-induced hepatotoxicity models, suggesting a hepatoprotective mechanism linked to antioxidant polyphenols that reduce oxidative hepatocyte damage. However, these findings are limited to preclinical settings, and no randomized controlled trials in humans have validated liver-protective dosing or efficacy.

### How do cassava leaves interact with medications?

The rutin content in cassava leaves may interfere with anticoagulant medications such as warfarin by modulating platelet aggregation and vitamin K-dependent clotting pathways, potentially altering INR values. Additionally, because cassava leaf extracts influence hepatic antioxidant enzyme activity (SOD, catalase), they could theoretically affect the metabolism of drugs processed by hepatic CYP450 enzymes, warranting caution and medical consultation before use alongside prescription medications.

### What is the most bioavailable form of cassava leaf supplement?

Ethanol-water extracts of cassava leaves demonstrate superior bioavailability of flavonoids compared to raw or dried leaf powders, as shown in hepatoprotective studies using 100-400 mg/kg dosages in animal models. Standardized extracts concentrating polyphenolic compounds may provide more consistent absorption than whole leaf preparations. The extraction method significantly influences the availability of active anti-inflammatory and antioxidant compounds in cassava leaf supplements.

### Is cassava leaf supplementation safe during pregnancy and breastfeeding?

Limited human clinical data exists on cassava leaf safety during pregnancy and lactation, so supplementation is not recommended during these periods without medical supervision. While cassava leaves are traditionally consumed as food in many cultures, the concentrated bioactive compounds in supplements may pose unknown risks to fetal development or nursing infants. Pregnant and breastfeeding women should consult healthcare providers before using cassava leaf extracts.

### What does the current clinical research show about cassava leaf effectiveness in humans?

Most evidence for cassava leaves' anti-inflammatory and hepatoprotective effects comes from preclinical animal studies, with limited human clinical trials published to date. Rodent models show cassava leaf extract outperforms indomethacin in reducing inflammation and restores liver enzyme markers in chemically-induced damage, but human efficacy and optimal dosing remain understudied. More rigorous clinical trials are needed to establish dosing recommendations and confirm benefits in human populations.

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