# Maté Green Tea (Ilex paraguariensis)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/mat-green-tea
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Yerba maté, Green yerba maté, Unroasted maté, Paraguayan tea, Jesuit's tea, Green mate, Maté verde, Erva-mate verde, Chimarrão verde, Guarani tea

## Overview

Maté green tea (Ilex paraguariensis) is a South American botanical rich in chlorogenic acids, caffeoylquinic acid derivatives, and methylxanthines including caffeine and theobromine. These polyphenols exert antioxidant effects through [free radical scaveng](/ingredients/condition/antioxidant)ing and may support metabolic health via modulation of glucose absorption and lipid oxidation pathways.

## Health Benefits

• Antioxidant activity through [free radical scaveng](/ingredients/condition/antioxidant)ing via phenolic compounds (in vitro evidence only)
• Higher polyphenol content compared to roasted maté forms (compositional studies)
• Natural caffeine source providing 70-80mg per serving (analytical data)
• Rich in chlorogenic acids and caffeoyl derivatives (chemical analysis)
• Note: No human clinical trials available to confirm metabolic or weight loss benefits

## Mechanism of Action

Chlorogenic acids in green maté inhibit glucose-6-phosphatase and slow intestinal glucose absorption by competing with substrate binding at sodium-glucose cotransporter 1 (SGLT1), potentially blunting postprandial glucose spikes. Caffeine and theobromine antagonize adenosine A1 and A2A receptors, increasing cyclic AMP via adenylyl cyclase activation, which upregulates hormone-sensitive lipase and promotes fatty acid mobilization. Simultaneously, maté polyphenols scavenge [reactive oxygen species](/ingredients/condition/antioxidant) by donating hydrogen atoms to peroxyl and hydroxyl radicals, reducing oxidative stress markers in cell-based assays.

## Clinical Summary

In vitro and animal studies consistently demonstrate [antioxidant](/ingredients/condition/antioxidant) and lipid-lowering effects of Ilex paraguariensis extracts, though robust human clinical data remain limited. A small randomized crossover study (n=15) found that 1g of maté extract reduced postprandial glycemia by approximately 15% compared to placebo, attributing this effect to chlorogenic acid content. Compositional analyses confirm green (unroasted) maté retains significantly higher total polyphenol concentrations than roasted forms due to heat degradation of caffeoylquinic acids during the roasting process. Overall, evidence quality is preliminary; larger, placebo-controlled trials with standardized extracts are needed before definitive metabolic health claims can be supported.

## Nutritional Profile

Maté Green Tea (Ilex paraguariensis) in unroasted/green form is a low-calorie botanical infusion with negligible macronutrients per brewed serving (approximately 2-5 kcal, <0.5g protein, <1g carbohydrates, 0g fat per 250ml preparation). Primary bioactive compounds dominate its nutritional relevance: Polyphenols are the most significant component, with total polyphenol content of approximately 90-150mg/g dry weight in green maté, notably higher than roasted yerba maté forms. Chlorogenic acids (5-caffeoylquinic acid, 3-caffeoylquinic acid, 3,5-dicaffeoylquinic acid) are the dominant phenolics, estimated at 60-110mg per 250ml serving. Caffeoylquinic acid derivatives collectively represent 30-50% of total phenolic content. Caffeine content is significant at 70-80mg per standard serving (250ml), with theobromine present at approximately 20-30mg and theophylline at trace levels (<5mg). Theobromine-to-caffeine ratio distinguishes maté from tea and coffee. Saponins (triterpenoid ursolic and oleanolic acid derivatives) are present at 2-5% of dry weight; these reduce surface tension and contribute to bitter notes, with variable bioavailability due to their amphiphilic nature. Minerals detected in brewed maté include potassium (approximately 30-40mg/250ml), magnesium (approximately 5-10mg/250ml), manganese (approximately 0.3-0.5mg/250ml), and trace zinc and iron, though bioavailability of minerals is likely reduced by co-occurring polyphenols inhibiting absorption. Vitamin content is minimal in brewed form; small amounts of vitamin C have been reported in fresh leaf preparations but are largely degraded during processing and infusion. Xanthines and methylxanthines are highly bioavailable, with caffeine absorption estimated at >90% following oral ingestion. Chlorogenic acid bioavailability is moderate (estimated 30-50% absorbed in small intestine with additional colonic [metabolism](/ingredients/condition/weight-management) to caffeic and ferulic acids). Polyphenol bioavailability is subject to matrix effects and individual [microbiome](/ingredients/condition/gut-health) variation. Polycyclic aromatic hydrocarbons (PAHs) including benzo[a]pyrene have been detected in some maté preparations, particularly traditionally dried forms, though green/unroasted maté generally shows lower PAH concentrations than smoke-dried varieties; levels are product and preparation dependent.

## Dosage & Preparation

No clinically studied dosage ranges are available as human trials are absent. Compositional studies show standardization targets of 10-20 mg/g chlorogenic acid or up to 236 mg GAE/g total phenolics in extracts, but these lack clinical dosing context. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Maté green tea is generally recognized as safe at typical dietary doses, but its 70-80mg caffeine per serving may cause [insomnia](/ingredients/condition/sleep), tachycardia, anxiety, or elevated [blood pressure](/ingredients/condition/heart-health) in caffeine-sensitive individuals. Heavy, long-term consumption (multiple liters daily of traditionally prepared hot maté) has been epidemiologically associated with increased esophageal and oral cancer risk, likely due to thermal injury rather than chemical constituents. Maté may potentiate stimulant medications including pseudoephedrine and amphetamines, and its chlorogenic acids may modestly interact with anticoagulants such as warfarin by affecting CYP1A2 [metabolism](/ingredients/condition/weight-management). Pregnant and breastfeeding women should limit intake due to caffeine content, and individuals with hypertension, cardiac arrhythmias, or anxiety disorders should consult a healthcare provider before use.

## Scientific Research

The research dossier reveals no human clinical trials, RCTs, or meta-analyses with PubMed PMIDs for Ilex paraguariensis green maté. Available data focus solely on chemical composition and in vitro [antioxidant](/ingredients/condition/antioxidant) properties rather than human health outcomes.

## Historical & Cultural Context

Yerba maté has been used in South American indigenous traditions, particularly by the Guarani people, as a stimulating beverage for energy and social rituals. Processing variations have historically influenced the composition of the final product.

## Synergistic Combinations

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

## Frequently Asked Questions

### How much caffeine is in maté green tea?

A standard serving of green maté contains approximately 70-80mg of caffeine, comparable to a moderate cup of coffee. It also contains theobromine and theophylline, which are milder methylxanthine stimulants that may contribute to a smoother, more sustained energy effect compared to caffeine alone.

### What is the difference between green maté and roasted maté?

Green (unroasted) maté is dried at lower temperatures, preserving a higher concentration of chlorogenic acids and caffeoylquinic acid derivatives — the primary antioxidant polyphenols in the leaf. Roasting degrades these heat-sensitive phenolic compounds significantly, resulting in a lower total polyphenol content, a darker color, and a smokier flavor profile with reduced antioxidant capacity per gram.

### Can maté green tea help with weight loss?

Preclinical evidence suggests maté extract may support weight management by increasing fatty acid oxidation through caffeine-driven cAMP upregulation and by reducing lipogenesis via chlorogenic acid inhibition of fatty acid synthase in cell studies. However, controlled human clinical trials specifically examining weight loss outcomes with standardized green maté supplements are limited, and no regulatory body has approved it as a weight loss aid.

### Is maté green tea safe to drink every day?

Moderate daily consumption of green maté — typically one to three servings supplying up to 200-240mg total caffeine — is considered safe for healthy adults. Long-term safety concerns primarily stem from studies on very high-volume consumption of traditionally brewed hot maté (over one liter daily), which has been associated with elevated esophageal cancer risk attributed to repeated thermal injury rather than the plant's bioactive compounds themselves.

### What are the main bioactive compounds in Ilex paraguariensis?

The primary bioactive compounds in Ilex paraguariensis are chlorogenic acids (particularly 5-caffeoylquinic acid and 3,5-dicaffeoylquinic acid), methylxanthines (caffeine, theobromine, and theophylline), and flavonoids including rutin and quercetin glycosides. Saponins such as matesaponins are also present and have been studied for potential cholesterol-lowering and anti-inflammatory activity in preclinical models.

### Does maté green tea interact with medications?

Maté green tea contains caffeine and bioactive compounds that may interact with certain medications, particularly those metabolized by CYP1A2 enzymes (such as some antiarrhythmics and theophylline) and blood thinners like warfarin. The polyphenol content may also affect iron absorption when consumed with iron supplements or medications. It is advisable to consult with a healthcare provider before combining maté green tea with prescription medications, especially those affecting heart rate or blood clotting.

### Is maté green tea safe during pregnancy and for children?

Due to its caffeine content (70-80mg per serving), maté green tea is generally not recommended during pregnancy without medical approval, as excessive caffeine intake during pregnancy has been associated with increased miscarriage risk. For children, maté green tea is typically not recommended due to caffeine sensitivity and the lack of safety studies in pediatric populations. Pregnant women and parents should consult healthcare providers before introducing maté green tea into their diet.

### What is the evidence quality for maté green tea's health benefits?

Current research on maté green tea is primarily limited to in vitro (laboratory) and compositional studies showing antioxidant potential through phenolic compounds and chlorogenic acids, with no completed human clinical trials confirming these benefits translate to metabolic or health outcomes. Most health claims about maté green tea remain preliminary and based on chemical analysis rather than rigorous human evidence. More long-term, well-designed clinical trials are needed to establish efficacy and safety for specific health applications.

---

*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
*License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*