Maté is a caffeinated drink made from the dried leaves of a plant native to South America, where it has been consumed for centuries. It delivers roughly the same caffeine as coffee, carries a distinctive grassy, slightly bitter flavor, and plays a central role in daily social life across Argentina, Uruguay, Paraguay, and southern Brazil. If you’ve seen someone sipping from a hollow gourd through a metal straw, that’s maté.
The Plant Behind the Drink
Maté comes from a tree that grows in the seasonally dry tropical regions stretching from southern Brazil down through Paraguay, Uruguay, and northeastern Argentina. The leaves are harvested, dried (often over wood smoke), and then aged before being ground into a coarse blend called yerba. The quality, flavor, and stimulant strength of the final product vary depending on growing conditions, how long the leaves are aged, and whether stems are included in the blend.
Caffeine and Other Active Compounds
A single cup of maté (about 150 mL) contains roughly 80 mg of caffeine, putting it on par with a standard cup of coffee. But most people don’t drink maté like coffee. The traditional method involves filling a gourd with yerba and pouring hot water over it repeatedly, refilling the same leaves many times over a session. That practice can push total caffeine intake past 260 mg in a single sitting, comparable to about three cups of coffee.
Beyond caffeine, maté contains theobromine, the same mild stimulant found in chocolate. Dry yerba contains 6 to 28 mg of theobromine per gram. The leaves are also rich in polyphenols, particularly chlorogenic acid and related compounds called caffeoylquinic acids. These are the same types of antioxidants found in coffee and green tea, though maté delivers them in a different balance. Saponins, compounds with a slightly bitter taste, round out the profile and contribute to maté’s distinctive flavor.
Many drinkers describe maté’s stimulation as smoother than coffee’s. That perception likely comes from the combination of caffeine, theobromine, and polyphenols working together, though the effect varies with how strong you brew it and how many refills you go through.
Cultural Roots and Social Ritual
Indigenous Guaraní people were the first to use the plant, long before European colonization. Today, maté is deeply tied to national identity in the Southern Cone region of South America. In Argentina and Uruguay especially, it’s not just a beverage but a social ritual. One person prepares the gourd, fills it with hot water, and passes it to the next person in the circle. Each person drinks the gourd dry, hands it back, and the server refills it for the next person. Refusing a round is considered impolite in many settings.
This sharing tradition makes maté fundamentally different from coffee or tea culture, where each person has their own cup. The communal aspect is the point. You’ll see people carrying thermoses and gourds to parks, offices, bus stops, and beaches throughout Argentina and Uruguay.
How Maté Is Prepared
Traditional preparation uses two pieces of equipment: a gourd (also called a maté) and a bombilla, a metal straw with a filtered end that strains out the leaf particles. You fill the gourd about two-thirds full with yerba, tilt it to create a slope, and pour hot water into the empty space. The key is water temperature. The best extraction happens between 150°F and 180°F (65°C to 82°C), well below boiling. Boiling water scorches the leaves and turns the flavor harsh and overly bitter.
Modern alternatives work fine if you don’t have traditional equipment. A French press, tea infuser, or even a regular mug with a strainer will produce a drinkable cup. Teabag versions exist too, though purists would argue they deliver a weaker, less complex flavor. The traditional gourd method is worth trying at least once, both for the richer taste and for the experience itself.
Effects on Metabolism and Exercise
Maté has a measurable effect on how your body burns fuel during physical activity. A study published in Nutrition & Metabolism found that people who consumed yerba maté before exercise burned 24% more fat at moderate intensities compared to a placebo. The effect was strongest during lighter exercise (walking pace and easy jogging) and tapered off as intensity increased toward maximum effort. At the same time, the body shifted away from burning carbohydrates and toward using fat stores, without hurting overall performance.
This doesn’t mean maté is a weight loss supplement. But the combination of caffeine, polyphenols, and saponins does appear to nudge metabolism toward greater fat utilization during low-to-moderate activity. That’s consistent with maté’s long reputation in South America as a drink that supports energy and leanness.
The Temperature Question and Cancer Risk
You may have seen headlines linking maté to esophageal cancer. The story behind those headlines matters. Early research noticed higher rates of esophageal cancer in heavy maté-drinking populations and initially suspected compounds in the leaves, particularly polycyclic aromatic hydrocarbons from the smoke-drying process. But when researchers looked more closely, they found the same cancer risk in people who drank very hot tea or very hot coffee. The common factor wasn’t the drink. It was the temperature.
In 2016, the International Agency for Research on Cancer updated its classification. It removed “hot maté drinking” as a specific risk category and replaced it with a broader classification: any beverage consumed above 149°F (65°C) is probably carcinogenic to the esophagus. A large pooled analysis showed that people who drank maté at warm or moderate temperatures had no elevated cancer risk regardless of how much they consumed. The practical takeaway: let your water cool a bit before pouring. Brewing at the recommended 150°F to 180°F range and allowing a moment before sipping keeps you well within safe territory.
Iron Absorption and Timing
Like coffee and black tea, maté’s polyphenols can interfere with your body’s ability to absorb iron from plant-based foods and supplements. The effect is substantial. One study found that drinking 300 mL of traditionally prepared maté alongside an iron supplement reduced iron absorption by about 73% compared to taking the supplement alone. That’s slightly more than black tea (60 to 70% reduction) and notably more than coffee (39%).
This only applies to non-heme iron, the type found in plants, beans, fortified cereals, and iron supplements. If you rely on these sources for your iron intake, or if you’ve been told your iron levels are low, timing matters. Drinking maté at least one hour before or 90 minutes after a meal largely avoids the interference. For people who eat plenty of iron-rich animal foods, this is less of a concern since heme iron from meat is absorbed through a different pathway.
Side Effects and Practical Limits
Because maté is a significant source of caffeine, it carries the same potential side effects: trouble sleeping, restlessness, upset stomach, and a rapid heartbeat. These are dose-dependent, so the all-day sipping style common in South America can deliver a large cumulative caffeine load without you realizing it. If you’re sensitive to caffeine, start with a single cup and see how you respond before adopting the refill-heavy traditional method.
Research suggests that up to three grams of yerba leaves brewed as tea daily is generally safe for periods of at least 12 weeks. That’s roughly one standard cup. Most regular drinkers in South America consume considerably more than that with no apparent issues, but individual tolerance varies widely. Pregnant individuals should be especially cautious with caffeine intake from any source, maté included.