Yerba Mate: Complete Caffeine Guide

A 240 ml cup of yerba mate has 85 mg of caffeine.

• 85 mg — the caffeine in a 240 ml brewed cup of yerba mate (35.4 mg/100 ml, USDA FoodData Central).
• 400 mg/day — the FDA’s recommended maximum for healthy adults; roughly five 240 ml cups of yerba mate.
• ~41 mg — about half the original caffeine from a 240 ml cup of yerba mate remains after ~6 hours (population half-life ~5.7 h).
• ~20 mg — roughly what remains ~12 hours after a single 240 ml cup of yerba mate.

How much caffeine is in yerba mate?

Measured for a 240 ml brewed serving, yerba mate contains 85 mg of caffeine (listed in USDA FoodData Central and reflected in the dataset above). That equals about 35.4 mg per 100 ml. Commercial bottled mate drinks may differ; brewed mate is the dataset standard.

Yerba mate compared with coffee, tea and energy drinks

Yerba mate sits between black tea and drip coffee in caffeine concentration per 240 ml. It is substantially lower than cold brew and many specialty coffees, but higher than green or white tea in most preparations.

How caffeine behaves in your body (metabolism and decay)

Caffeine is eliminated following an approximate population-average half-life of 5.7 hours; that means the body removes about half of the caffeine roughly every 5.7 hours. Individual clearance varies widely with genetics, medication, pregnancy and smoking status. Sources: Mayo Clinic, FDA.

What changes caffeine clearance?

• Genetics: CYP1A2 variants alter speed of clearance (some people are fast metabolizers).
• Smoking increases clearance; oral contraceptives, pregnancy, and liver disease slow it (Mayo Clinic).
• Multiple drinks add up: the FDA considers total daily caffeine from all sources when advising limits.

Health benefits and risks of yerba mate

Yerba mate contains caffeine and polyphenols; scientific reviews note short-term benefits for alertness, concentration and modest metabolic effects. Long-term epidemiology on high, chronic mate consumption shows mixed cancer associations in heavy, very hot mate drinkers — confounding factors include temperature and concurrent tobacco use. Cite: EFSA and peer-reviewed reviews.

Risks align with caffeine dose: palpitations, anxiety, elevated blood pressure and sleep disruption in sensitive individuals. The FDA’s guidance for healthy adults is a maximum of 400 mg/day; for pregnancy many authorities recommend keeping caffeine under 200 mg/day. The American Academy of Pediatrics discourages caffeine for adolescents because of sensitivity and dose uncertainty.

Timing, sleep and practical intake rules

Use the half-life math above to time consumption. From a single 240 ml cup of yerba mate (85 mg): if you want <20 mg in your system at bedtime, you should stop roughly 12 hours before sleep; to reduce sleep impact for most people, avoid caffeinated beverages 6 hours before bed.

Stacking matters: two 240 ml cups (2 × 85 mg = 170 mg) will leave roughly ~82 mg after 6 hours. If you track intake, you can calculate remaining caffeine and plan sleep and exercise accordingly.

Popular preparations and how brewing affects caffeine

Preparation matters: steep time, water temperature and leaf-to-water ratio change extraction. Traditional gourd mate prepared repeatedly from the same leaves tends to give repeated moderate doses rather than one large shot; commercial single-brew servings are easier to quantify. Packaged drinks like Club-Mate (330 ml, 66 mg in the dataset) are potable alternatives with known labels.

Managing jitters, tracking and actionable tips

• Measure serving sizes: a measured 240 ml cup of yerba mate = 85 mg; use a kitchen cup or a scale for accuracy.
• Split doses: smaller sips over a longer period reduce peak blood caffeine and may lower jitters.
• Track cumulative intake with an app: CoffeeLog can log servings and compute remaining mg over time automatically.
• If pregnant or taking medications, consult your clinician; recommended pregnancy caffeine limits are lower (around 200 mg/day by many authorities).

This guide uses published reference numbers (USDA FoodData Central, FDA, Mayo Clinic, EFSA, American Academy of Pediatrics) and the dataset values above. Information is educational and not a substitute for medical advice.

How do I calculate how much caffeine is still in my body after several yerba mate cups?

Use first-order elimination math with a population half-life of 5.7 hours to compute remaining caffeine: remaining mg = dose × 0.5^(hours / 5.7), and apply that formula separately to each serving and sum the results. For practical planning, plug your servings (for example, 85 mg per 240 ml yerba mate in the dataset) into the formula or use a calculator that does this for you.

First-order elimination is a process where the drug amount declines at a rate proportional to the current amount, producing an exponential decay curve. The population-average half-life we use is 5.7 hours (342 minutes), as used throughout this guide and discussed by sources such as the Mayo Clinic.

Worked example 1 — one 240 ml cup of yerba mate (85 mg): after 3 hours remaining = 85 × 0.5^(3/5.7) = 85 × 0.5^(0.526) ≈ 85 × 0.70 ≈ 59 mg (population model; Mayo Clinic). After 6 hours remaining = 85 × 0.5^(6/5.7) = 85 × 0.5^(1.053) ≈ 85 × 0.48 ≈ 41 mg. Show your arithmetic explicitly when you plan sleep or exercise.

Worked example 2 — two 240 ml cups back-to-back (170 mg): after 6 hours remaining = 170 × 0.5^(6/5.7) ≈ 170 × 0.48 ≈ 82 mg. After 12 hours remaining = 170 × 0.5^(12/5.7) ≈ 170 × 0.23 ≈ 39 mg. Always calculate total remaining by summing each serving's remaining mg if they were consumed at different times.

Want automated math? Use our caffeine half-life calculator to enter multiple servings and times; it applies the 5.7-hour half-life and returns remaining mg for each entry.

Can yerba mate change how my prescription medicines behave or vice versa?

Yes — substances that change caffeine clearance can alter yerba mate’s effects, and caffeine can interact with drugs that influence heart rate, blood pressure, or central nervous system stimulation. Ask your clinician about specific combinations if you take drugs affecting the liver, the heart, or the central nervous system.

CYP1A2 is the liver enzyme that metabolizes most of the caffeine adults consume. Medications or conditions that inhibit CYP1A2 will slow caffeine clearance and raise effective exposure; conversely, CYP1A2 inducers lower exposure.

Examples: oral contraceptives and pregnancy slow caffeine clearance and therefore increase the time caffeine stays active (Mayo Clinic), while chronic smoking increases clearance (Mayo Clinic). If you take strong CYP1A2 inhibitors or inducers your clinician can advise dose timing or recommend lower daily limits; pregnant people should consult pregnancy-specific guidance such as our caffeine pregnancy safety guide and EFSA's 2015 opinion (which sets a 200 mg/day pregnancy recommendation).

If you are prescribed stimulant drugs, certain antibiotics, or antiarrhythmics, name caffeine during medication review so your clinician can look for interactions; definitive drug-by-drug interaction lists are available in clinical references and from your prescriber.

Does sipping traditional gourd mate produce gentler caffeine effects than drinking a whole cup at once?

Sipping mate from a gourd over an hour or more tends to produce lower peak caffeine concentration and smoother subjective effects than gulping an 85 mg brewed cup at once because smaller repeated doses are absorbed while elimination proceeds. The total caffeine exposure (area under the curve) can be similar, but peaks and associated jitter are lower with spread-out dosing.

Bolus dosing is a single large administration of a substance that produces a higher initial blood concentration than the same amount spread over time. That difference in peak concentration explains why steady sipping feels milder even if the cumulative mg consumed is the same.

Illustrative calculation: if you split 85 mg into three equal mini-doses of 28.3 mg delivered at 0, 1.5, and 3 hours, compute remaining caffeine at 6 hours by applying the decay formula to each mini-dose: 28.3×0.5^(6/5.7) for the 0-hour dose ≈ 28.3×0.48 ≈ 13.6 mg; 28.3×0.5^((6−1.5)/5.7) ≈ 28.3×0.64 ≈ 18.1 mg; 28.3×0.5^((6−3)/5.7) ≈ 28.3×0.82 ≈ 23.2 mg; sum ≈ 55 mg remaining at 6 hours. If instead you drank 85 mg at time 0, remaining at 6 hours ≈ 41 mg. The spread-out pattern yields a higher remaining total at 6 hours in this schedule but with lower instantaneous peaks after each mini-dose; choose the pattern that fits your sensitivity and schedule.

Traditional repeated pours also vary by leaf strength and water temperature; if you need tighter control, measure portions and track cumulative intake with a log or our calculator.

How should I combine yerba mate with other caffeinated drinks without exceeding safe limits?

Keep a running total of mg from all sources and compare to authoritative limits: the FDA recommends a maximum of 400 mg/day for healthy adults (U.S. Food and Drug Administration), and EFSA's 2015 opinion sets 200 mg as a prudent single-dose and 200 mg/day guideline in pregnancy (EFSA 2015). Avoid stacking that brings you near those numbers within a short window.

Combined dose is the total caffeine from all sources consumed in a defined time window; always count yerba mate plus coffee, energy drinks, pills and chocolate. For example: a 240 ml yerba mate (85 mg) + a 250 ml Red Bull (80 mg) + a single espresso (63 mg) equals 228 mg taken close together (85 + 80 + 63 = 228 mg), exceeding EFSA's single-dose 200 mg recommendation and using more than half the FDA daily 400 mg limit in one sitting (EFSA 2015; FDA).

Practical rule: if you plan an afternoon espresso or energy drink, reduce or skip one mate cup earlier in the day; our safe daily limit tool and caffeine comparison tool let you model combinations from the dataset and see totals in mg. Also note sleep interactions: Drake et al. (2013) found that 400 mg taken 6 hours before bedtime reduced objective sleep time by more than an hour (Journal of Clinical Sleep Medicine), so leave adequate time before bed if you stack doses.

What symptoms indicate excessive caffeine from yerba mate and when should I seek medical help?

Mild overdose signs include restlessness, tremor, insomnia, palpitations, and gastrointestinal upset; severe acute toxicity can cause chest pain, fainting, confusion, or seizures and requires immediate medical attention. If you develop chest pain, repeated fainting, severe shortness of breath, or seizure after consuming caffeine, call emergency services.

Caffeine overdose is a harmful acute effect caused by ingesting a large amount of caffeine; clinical thresholds vary with body weight and sensitivity. For context, five 240 ml cups of yerba mate (5 × 85 mg = 425 mg) exceed the FDA’s 400 mg/day guidance for healthy adults (U.S. Food and Drug Administration), and single-dose risks are highlighted by EFSA's 2015 opinion which recommends keeping single exposures below about 200 mg for safety considerations (EFSA 2015; FDA).

If you or someone else has a very high single intake from supplements or pills (for example several 200 mg caffeine pills, dataset entry), or shows severe cardiovascular or neurological symptoms, seek emergency care; our caffeine overdose guide covers symptoms and prevention strategies in more detail. Adolescents and people with arrhythmias are more vulnerable; see our teenager safety guide and consult a clinician before consuming stimulant-level doses.

Bottom line

A standard 240 ml brewed cup of yerba mate contains 85 mg of caffeine (USDA FoodData Central), and the population-average elimination half-life used here is 5.7 hours (Mayo Clinic). Using the exponential decay model remaining mg = dose × 0.5^(hours / 5.7) gives concrete planning numbers: from one 85 mg cup you will have about 41 mg left after 6 hours and about 20 mg left after 12 hours (85 × 0.5^(6/5.7) ≈ 41 mg; 85 × 0.5^(12/5.7) ≈ 20 mg).

Respect authoritative limits: the U.S. Food and Drug Administration recommends a maximum of 400 mg/day for healthy adults (FDA), and the European Food Safety Authority's 2015 opinion recommends keeping single doses below ~200 mg and suggests a 200 mg/day limit during pregnancy (EFSA 2015). When combining yerba mate with other sources (for example a 250 ml Red Bull = 80 mg or a single espresso = 63 mg from the dataset), add the mg totals and compare them to those limits; if a single sitting exceeds 200 mg you should be cautious and if daily totals approach or exceed 400 mg consider cutting back (EFSA 2015; FDA).

Use tools and tracking to manage intake: our caffeine half-life calculator, safe daily limit tool and caffeine comparison page let you model combinations and timings from the dataset. If you have pregnancy, heart rhythm, young age, liver disease, or are on medications that affect CYP1A2, consult your clinician and refer to pregnancy-specific guidance in our pregnancy safety guide (EFSA 2015; Mayo Clinic).