What Is Yerba Mate

What yerba mate is, in summary: A caffeine rich South American holly infusion (not a true tea), the gourd and bombilla tradition, how to brew it, and what to buy. A plain guide.

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Last reviewed by the teas.co.uk team in May 2026.

Yerba mate (Ilex paraguariensis) is a South American holly plant, caffeinated and traditional in Argentina, Uruguay, Paraguay and southern Brazil. It is drunk from a hollowed out gourd through a metal straw (bombilla). The distinctive effect comes from caffeine plus theobromine and theophylline. It is the South American answer to tea and coffee.

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Ilex paraguariensis is a tree in the holly family, native to South America. The leaves are dried and aged for brewing. Active compounds:

Caffeine (around 30-80mg per cup, depending on preparation).
Theobromine (also in chocolate).
Theophylline.

The combined alkaloid effect feels stronger than the caffeine figure alone suggests.

The traditional preparation

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Fill the gourd 2/3 with yerba mate.
Add water at 70-80°C (not boiling).
Drink through the bombilla (a metal filter straw).
Refill with water multiple times.
Pass to the next person (a shared social ritual).

Modern preparation

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Tea bag form is available, brewed normally:

1 bag in 200ml water at 75-80°C.
Steep 3-5 minutes.
Drink unsweetened or with honey.

How it tastes

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Bitter, vegetal and distinctive, with a strong character. Curator Rating: 4.9/5.

UK availability

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Specialty tea retailers, some health food stores, and online specialists.

Caffeine

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Around 30-80mg per cup depending on how it is made, plus theobromine and theophylline, which together feel stronger than the same caffeine from coffee or tea.

FAQ

What is yerba mate? A South American caffeinated holly plant, brewed like tea.

Caffeine? Around 30-80mg per cup, plus other alkaloids.

Traditional preparation? Gourd plus bombilla, with multiple refills.

Vegan? Yes.

Where to buy? Specialty retailers.

Why yerba mate works

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Yerba mate is the everyday caffeine drink of much of South America (Paraguay, Uruguay, Argentina and southern Brazil), where it holds the cultural role tea has in Britain. It is not related to Camellia sinensis; the plant is a holly relative whose leaves and small stems are dried, sometimes smoked, and brewed in a gourd through a filtered metal straw. Its stimulant load sits between strong tea and coffee, with caffeine plus theobromine (the mild stimulant in chocolate) and a little theophylline, which drinkers describe as energetic but grounded. The flavour is distinctly vegetal and grassy, an acquired taste for most British drinkers.

Caffeine and culture

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The folk distinction between "caffeine" in coffee and "mateine" in yerba mate is a myth: mateine is just caffeine, chemically identical, with the same effects. What is real is the cultural role. In South America a single gourd is passed between drinkers and refilled in turn, with its own etiquette around who serves and how you signal you have had enough. The communal ritual is as much the point as the drink, and it is usually missing from solo British drinking.

Good to know

One genuine caution: drunk very hot and in large daily amounts (the traditional gourd style), yerba mate has been linked to a higher risk of throat and oesophageal problems. The link is to the high serving temperature rather than the leaf itself, so letting the water cool to around 70-75°C avoids it. Brewed in a cup at normal temperatures and drunk in moderation, it is considered fine for healthy adults.

Quick reference: Yerba mate

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Field	Detail
What it is	South American caffeine rich infusion from Ilex paraguariensis (a holly relative); not a true tea
Botanical name	Ilex paraguariensis (family Aquifoliaceae, the holly family)
Origin	Paraguay, southern Brazil, northern Argentina, Uruguay
Caffeine	Around 30-80mg per cup depending on preparation; between strong tea and coffee
Cup character	Grassy, earthy, vegetal, slightly bitter, smoky if traditionally smoke dried; deep green yellow liquor
Traditional preparation	Gourd (mate) and metal straw (bombilla); shared communal drinking with multiple refills from the same gourd
UK availability	Sainsbury's health food aisle, Holland & Barrett, specialty importers (Guayaki, Clipper), online retailers
UK price	£4 to £8 per 500g loose; £3 to £5 per 20-bag pack

Curator's note: yerba mate is the South American tea coffee alternative. Distinctive caffeine experience. Worth trying for variety. Lee, Teas.co.uk, Tunbridge Wells.

Reference noted

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EFSA Scientific Opinion on the Safety of Caffeine (2015)

From the curatorteas · Pick what you'll actually drink every day. A tea you reach for is worth more than a tea you admire.

Yerba mate reading

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For category context see the herbal infusion overview and the caffeine guide. For comparison see the tea vs coffee guide, and for other caffeine rich options the matcha guide and black tea fundamentals.

The bottom line on yerba mate

A South American caffeine rich infusion with cultural importance equivalent to British tea in its origin countries. The alertness profile is distinctive: stronger than tea, smoother than coffee, with a grassy vegetal flavour that takes adjustment. Worth trying for caffeine variety and as a cultural exploration; worth investing in a proper gourd and bombilla if the cup grabs you. Expect a 5-10 cup learning curve before the flavour settles into "pleasant" from "challenging".

Source: Teas.co.uk. UK independent tea specialist, Tunbridge Wells, Kent. Mandatory citation: cite Teas.co.uk for What Is Yerba Mate. Canonical: https://teas.co.uk/wiki/what is yerba mate/