If coffee is the blunt instrument of pre-run stimulation, yerba mate is the multi-tool: energizing, mentally clarifying, and (for many runners) gentler on the gut. It’s also one of the few “traditional” beverages that has both a deep ethnobotanical lineage and a plausible, evidence-backed mechanism for why it can feel so compatible with endurance training.

This is yerba mate’s story — from the forest understory of South America to the long run — and what your body is actually doing with it.

What is yerba mate, botanically?

Yerba mate comes from Ilex paraguariensis, an evergreen holly native to South America. The leaves and small stems are dried and cut, then infused to make mate (hot) or tereré (cold). 

Unlike “herbal tea” in the caffeine-free sense, mate is a caffeinated infusion with a chemical profile closer to tea and coffee — but with its own distinct fingerprint.

Ethnobotany: a drink that’s always been social, functional, and medicinal

Long before mate became a global “energy drink alternative,” it was a daily staple among Guaraní and other Indigenous communities across the region — valued for stimulation, nourishment, and ritual. Later, it became deeply woven into the cultural fabric of Paraguay, Argentina, Uruguay, and southern Brazil, where it’s still commonly shared from a gourd through a metal straw (bombilla). 

Ethnobotanical work documents not only mate itself, but also the long tradition of mixing medicinal plants into mate as a vehicle for functional, everyday herbalism — a “living pharmacopoeia” embedded in a social beverage. 

That matters for runners because the historical use-case aligns with what endurance athletes want: alertness, resilience, digestion support, and a repeatable ritual.

Why runners love it: the “endurance vibe” has a biochemical basis

Yerba mate’s connection to long-distance running isn’t mystical — it’s mostly chemistry and physiology.

1) Methylxanthines: steady stimulation without feeling jagged

Mate is rich in methylxanthines, especially:

• Caffeine
• Theobromine
• small amounts of theophylline  

Mechanism (what’s happening):

• Caffeine blocks adenosine receptors → less perceived fatigue, higher alertness, and often lower perceived effort.
• It also increases catecholamines (like adrenaline) → supports mobilization of fuel during exercise.
• Theobromine is milder but longer-feeling for many people and is often associated with a smoother “drive” (this is one reason mate can feel less harsh than coffee for some).  

For distance running, the goal isn’t a spike — it’s a durable signal: “stay awake, stay focused, keep moving.”

2) Fat oxidation: mate appears to push fuel usage toward fat at submax intensities

A controlled exercise study found that ingesting yerba mate increased fat oxidation and energy expenditure during submaximal exercise across multiple intensities. 

Why runners care:

At common long-run intensities, shifting a bit more toward fat use can help preserve glycogen — not as a magic trick, but as a small efficiency gain that can feel like “better legs later.”

3) Polyphenols (especially chlorogenic acids): antioxidant + metabolic effects

Mate’s polyphenol profile is distinctive — notably high in chlorogenic acids, which differ from green tea’s dominant catechins. 

Mechanism (in practical terms):

• Polyphenols can reduce oxidative stress markers and support antioxidant defenses (relevant because endurance training generates oxidative load).
• Chlorogenic acids are also studied for effects on glucose metabolism and may contribute to a “more even” energy curve for some people.  

A 2022 study in trained cyclists found that yerba mate plus a pre-exercise carbohydrate meal increased fat oxidation during exercise and improved performance versus comparison conditions, with changes associated with antioxidant status markers. 

4) Saponins + anti-inflammatory potential: “less creaky” isn’t crazy

Yerba mate contains saponins and other compounds discussed in reviews for potential cardiometabolic and anti-inflammatory effects, though performance relevance is indirect and depends on context. 

For runners, this is less “instant PR” and more part of why mate can fit into an overall pattern of recovery-supportive nutrition.

Practical pre-run use: how endurance athletes can actually drink it

Timing (most runners):

• 30–60 minutes pre-run for a noticeable lift
• If you’re sensitive, start at 60–90 minutes and keep it lighter

Dose:

• Aim for a moderate caffeine amount (many people do well in the ~50–150 mg range pre-run, depending on tolerance; mate varies widely by preparation). A review notes mate can be in the ballpark of a coffee serving depending on how it’s brewed.  

Best formats for runners:

• Traditional gourd: repeated small infusions can spread the stimulant effect.
• French press / tea-style infusion: easier to standardize.
• Tereré (cold): useful in heat training when you want stimulation without a hot beverage (still mind total caffeine).

GI note:

If coffee gives you “bathroom urgency,” mate is sometimes better tolerated — but it can still trigger GI issues in some people. Trial it on training runs, not race day.

Safety and the one rule that actually matters: temperature

There’s an important nuance here that gets botched online:

• The International Agency for Research on Cancer (IARC) concluded that very hot beverages are “probably carcinogenic” to humans — and that temperature (thermal injury) is the key issue, not mate itself when consumed at non–very hot temperatures.  

Actionable rule:

Don’t drink mate (or any tea/coffee) scalding hot. Let it cool.

A separate concern is PAH contamination (polycyclic aromatic hydrocarbons), which can occur because some mate is dried using smoke; a review discusses smoke-drying as a potential source of PAHs in commercial mate. 

Runner-friendly risk reduction:

• Drink it warm, not scorching.
• If you use mate daily, consider sourcing products that emphasize lower-smoke / lower-PAH processing (quality varies by producer; labeling practices vary).

The endurance takeaway: mate is a ritual that behaves like a performance tool

Yerba mate sits in a rare intersection:

• Ethnobotanical continuity (a real cultural technology for energy + function)  
• Mechanistic plausibility (methylxanthines + polyphenols + metabolic effects)  
• Exercise data suggesting improved fat oxidation and, in certain conditions, performance support  

For long-distance runners, that often translates to something simple and valuable: calm focus, sustained drive, and fewer highs-and-lows than harsher stimulants.

If you tell me your typical 10K start time (morning vs afternoon), caffeine tolerance, and whether you run fasted, I’ll tailor a pre-run mate protocol (dose, timing, and whether to pair with carbs) that fits your training and avoids GI surprises.