# Yerbamate (Ilex paraguariensis)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/yerbamate
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 8 / 10
**Category:** South American
**Also Known As:** Ilex paraguariensis, Paraguay tea, Mate, Chimarrão, Tereré, Jesuit's tea, Brazilian tea

## Overview

Yerba mate (Ilex paraguariensis) is a South American plant containing high levels of polyphenols (40-176 mg/g) and chlorogenic acids that provide potent [antioxidant activity](/ingredients/condition/antioxidant). The bioactive compounds demonstrate strong free-radical scavenging properties with DPPH IC50 of 2.52 mg/mL and catalase-like activity.

## Health Benefits

• [Antioxidant activity](/ingredients/condition/antioxidant): Strong free-radical scavenging properties with DPPH IC50 of 2.52 mg/mL and high catalase-like activity (evidence quality: in-vitro only)
• Polyphenol content: Contains 40-176 mg/g total polyphenols including chlorogenic acids (~10%) with potential [anti-inflammatory](/ingredients/condition/inflammation) effects (evidence quality: chemical analysis only)
• Natural caffeine source: Provides 0.59 mg/g caffeine for potential energy support (evidence quality: compositional data)
• Mineral content: Releases 14-50% of elements like Mg, Zn, Mn when prepared as infusion (evidence quality: extraction studies)
• Traditional digestive support: Historically used for [digestion](/ingredients/condition/gut-health) and energy in South American cultures (evidence quality: traditional use only)

## Mechanism of Action

Yerba mate's chlorogenic acids and polyphenols neutralize [free radical](/ingredients/condition/antioxidant)s through direct electron donation and metal chelation pathways. The compounds enhance endogenous antioxidant enzymes like catalase and superoxide dismutase while inhibiting pro-[inflammatory](/ingredients/condition/inflammation) mediators. Polyphenols modulate NF-κB signaling pathways to reduce inflammatory cytokine production.

## Clinical Summary

Current evidence for yerba mate is limited to in-vitro studies demonstrating [antioxidant activity](/ingredients/condition/antioxidant) with DPPH IC50 values of 2.52 mg/mL. Laboratory analysis confirms polyphenol content ranging from 40-176 mg/g with approximately 10% chlorogenic acids. No human clinical trials have been conducted to establish therapeutic efficacy or optimal dosing. Evidence quality remains preliminary and requires human studies for clinical validation.

## Nutritional Profile

Yerba mate (Ilex paraguariensis) dried leaf composition per 100g dry weight: Carbohydrates ~40-45g (primarily structural polysaccharides and soluble sugars ~3-5g); Protein ~10-13g (containing essential amino acids including leucine, isoleucine, and valine at modest concentrations); Fat ~4-6g (predominantly unsaturated fatty acids); Dietary fiber ~20-25g (cellulose, hemicellulose, pectin). Key bioactive compounds: Total polyphenols 4,000-17,600 mg/100g dry weight, dominated by chlorogenic acids (caffeoylquinic acid derivatives ~4,000mg/100g), rutin ~1,500-2,000mg/100g, quercetin ~100-200mg/100g, and kaempferol glycosides. Methylxanthines: caffeine 59mg/100g dry leaf (0.59mg/g), theobromine ~270-370mg/100g, theophylline trace amounts <10mg/100g. Saponins (ursolic and oleanolic acid derivatives) ~50-100mg/100g contributing bitter taste and surfactant properties. Minerals: potassium ~500-700mg/100g, magnesium ~200-300mg/100g, manganese ~50-70mg/100g (notably high), calcium ~700-900mg/100g, phosphorus ~100-150mg/100g, iron ~3-6mg/100g, zinc ~2-4mg/100g. Vitamins: vitamin C ~15-20mg/100g (degraded significantly by hot water preparation), B vitamins including B1 (thiamine) ~0.1mg/100g, B2 (riboflavin) ~0.2mg/100g, B3 (niacin) ~6-7mg/100g, B5 (pantothenic acid) ~0.3mg/100g. Bioavailability notes: Polyphenol bioavailability from brewed mate is estimated at 20-40% for chlorogenic acids, which undergo colonic [metabolism](/ingredients/condition/weight-management) to dihydrocaffeic and dihydroferulic acids; caffeine bioavailability approaches 90%+ when consumed as infusion; mineral bioavailability may be reduced by polyphenol-mineral complexation, particularly for iron and calcium; typical 500mL brewed mate preparation extracts approximately 300-500mg total polyphenols, 25-35mg caffeine, and 130-185mg theobromine into solution depending on water temperature (55-80°C optimal) and steeping duration.

## Dosage & Preparation

No clinically studied dosage ranges for extracts, powder, or standardized forms are available in the research. Typical preparations include infusions from dried leaves or spray-dried extracts standardized to polyphenol content. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Yerba mate contains caffeine and may cause [insomnia](/ingredients/condition/sleep), anxiety, and increased heart rate in sensitive individuals. Regular consumption of hot mate through traditional bombilla straws has been associated with increased esophageal cancer risk due to thermal injury. May interact with stimulant medications and blood thinners due to caffeine content. Pregnant and breastfeeding women should limit intake due to caffeine content.

## Scientific Research

The research dossier indicates that search results lack specific details on key human clinical trials, RCTs, or meta-analyses for yerbamate, with no PubMed PMIDs for study designs, sample sizes, or outcomes available. Current evidence is limited to compositional analyses and in-vitro [antioxidant](/ingredients/condition/antioxidant) studies rather than human clinical trials.

## Historical & Cultural Context

Yerbamate has a long history in Guarani indigenous traditions of South America, used for centuries as a stimulating tea for energy, [digestion](/ingredients/condition/gut-health), and social rituals. It has evolved into a cultural staple described as having 'a long but current history' and remains central to South American social customs.

## Synergistic Combinations

Green tea extract, L-theanine, Rhodiola rosea, Guarana, Ginseng

## Frequently Asked Questions

### How much caffeine is in yerba mate compared to coffee?

Yerba mate contains approximately 85mg of caffeine per 8oz cup, which is slightly less than coffee's 95mg but more than green tea's 25-50mg. The caffeine in yerba mate is often described as providing smoother energy without jitters due to the presence of theobromine and theophylline.

### What are the main antioxidant compounds in yerba mate?

Yerba mate's primary antioxidants include chlorogenic acids (comprising about 10% of total polyphenols), caffeic acid, quercetin, and rutin. Total polyphenol content ranges from 40-176 mg/g of dried leaves, with chlorogenic acids being the most abundant and bioactive compounds.

### Can yerba mate help with weight loss?

While yerba mate contains caffeine and compounds that may boost metabolism, there are no human clinical trials proving weight loss benefits. The theoretical mechanisms include increased thermogenesis and fat oxidation, but evidence remains limited to animal studies and in-vitro research.

### Is drinking yerba mate through a bombilla safe?

Drinking very hot yerba mate (above 149°F/65°C) through metal bombilla straws has been linked to increased esophageal cancer risk in South American populations. This risk appears related to thermal injury rather than the plant itself, so consuming cooled yerba mate is considered safer.

### How does yerba mate's antioxidant activity compare to other teas?

Yerba mate demonstrates strong antioxidant activity with DPPH IC50 of 2.52 mg/mL and high catalase-like activity. While direct comparisons vary by study methodology, yerba mate generally shows comparable or superior antioxidant capacity to green tea, though both are excellent sources of protective polyphenols.

### Is yerba mate safe during pregnancy and breastfeeding?

Yerba mate contains caffeine (approximately 0.59 mg/g), which crosses the placenta and enters breast milk, so pregnant and nursing women should limit or avoid consumption due to potential risks to fetal development and infant sleep. Medical organizations typically recommend restricting caffeine intake during pregnancy to less than 200 mg daily, and yerba mate's variable caffeine content makes dosing difficult. Consultation with a healthcare provider is advisable before use during these periods.

### Does yerba mate interact with medications or supplements?

Yerba mate's caffeine content can potentiate stimulant medications and reduce the effectiveness of certain drugs metabolized by the cytochrome P450 enzyme system, particularly CYP1A2 and CYP3A4. It may also increase the effects of blood pressure medications and anticoagulants, and can interfere with iron and calcium absorption. Anyone taking prescription medications or blood thinners should consult their healthcare provider before regular yerba mate consumption.

### What is the difference between loose-leaf yerba mate, powdered, and concentrated extracts?

Loose-leaf yerba mate provides a traditional preparation with variable polyphenol content (40-176 mg/g) depending on processing, while powdered forms offer convenience and more consistent dosing of bioactive compounds. Concentrated extracts standardize specific polyphenols like chlorogenic acid but may lack some synergistic compounds present in whole-leaf preparations, and clinical evidence is primarily from whole-leaf or aqueous preparations rather than isolated extracts. The choice depends on whether you prioritize traditional preparation methods, convenience, or standardized polyphenol dosing.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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