Kafein Teh Hijau: Penjelasan Lengkap

A standard 240 ml cup of brewed green tea contains 28 mg of caffeine.

• 240 ml brewed green tea = 28 mg caffeine (11.7 mg/100 ml).
• Matcha (1 tsp, whisked) = 70 mg, about 2.5× brewed green tea.
• Typical brewed coffee (drip) 240 ml = 96 mg200 mg for context.
• Population-average caffeine half-life ≈ 5.7 hours; after 6 h ~48% remains.

Kadar kafein pada teh hijau standar

Nilai dataset untuk satu cangkir 240 ml (sekitar 8 fl oz) teh hijau seduhan adalah 28 mg (11.7 mg per 100 ml). Angka itu mencerminkan penyeduhan tunggal tipikal menggunakan daun longgar atau kantong teh pada kekuatan standar. Jika dibandingkan dengan teh panas umum lain dalam dataset: black tea 240 ml = 47 mg, oolong = 37 mg, white tea = 16 mg.

Variasi antar jenis teh hijau

Tidak semua teh hijau sama. Matcha adalah teh hela daun yang dihaluskan dan memberikan seluruh kafein daun ke dalam cangkir—dataset: matcha (1 tsp) = 70 mg. Varietas bernama lain (sencha, gyokuro, bancha) tidak tercantum secara terpisah dalam dataset; kandungan kafein mereka bergantung pada pilihan daun dan cara persiapan. Teh yang ditanam dengan naungan (gyokuro) biasanya mengonsentrasikan kafein dan L-theanine dibandingkan daun yang ditanam di bawah sinar matahari, jadi harapkan nilai yang lebih tinggi daripada 28 mg per 240 ml.

Tabel perbandingan cepat (nilai dataset)

Faktor yang mengubah kafein teh hijau

Variabel utama adalah jenis daun, rasio daun terhadap air, suhu air, lama penyeduhan, dan apakah Anda mengonsumsi daunnya (matcha) atau hanya infusnya. Penyeduhan lebih lama dan air lebih panas mengekstrak lebih banyak kafein; penggandaan massa daun kira-kira menggandakan kafein. Karena matcha adalah hela daun berbentuk bubuk, konsentrasinya lebih tinggi daripada infus tipikal pada volume yang sama.

Panduan praktis penyeduhan

• Untuk mengurangi kafein: gunakan air yang lebih dingin, waktu seduh lebih singkat (30–60 seconds), atau pilih white tea (dataset: 16 mg/240 ml).
• Untuk meningkatkan kafein: gunakan lebih banyak daun, air lebih panas, waktu seduh lebih lama, atau pilih matcha (70 mg) atau yerba mate (85 mg).

Bagaimana kafein dari teh hijau lenyap dalam tubuh

Kafein mengikuti eliminasi orde pertama dengan waktu paruh rata-rata populasi sekitar 5.7 hours. Itu berarti jumlahnya dalam tubuh Anda turun kira-kira setengah setiap 5.7 hours. Di bawah ini adalah perhitungan mili-gram yang tersisa dari dua dosis nyata dalam dataset: 28 mg (teh hijau seduhan) dan 70 mg (matcha).

Contoh: setelah satu cangkir 240 ml teh hijau (28 mg), kira-kira 14 mg tersisa setelah 6 hours dan sekitar 7 mg setelah 12 hours. Untuk matcha (70 mg), sekitar 34 mg tersisa pada 6 hours dan 17 mg pada 12 hours. Waktu paruh individual bervariasi dengan usia, genetika, kehamilan, fungsi hati dan obat-obatan lain yang dikonsumsi bersamaan.

Konteks kesehatan, batas aman dan penjadwalan

Panduan otoritatif: U.S. FDA menyebut sekitar 400 mg/day sebagai batas atas acuan untuk orang dewasa sehat; banyak organisasi menyarankan konsumsi lebih rendah saat kehamilan (≈200 mg/day) dan American Academy of Pediatrics menganjurkan agar remaja menghindari kafein. Satu cangkir teh hijau seduhan (28 mg) rendah dibandingkan batas ini, tetapi beberapa cangkir atau sajian matcha dapat bertambah cepat.

Penjadwalan praktis: karena sekitar setengah kafein tersisa setelah ~6 hours, hindari mengonsumsi teh hijau terkonsentrasi (matcha atau beberapa cangkir) dalam 6 hours sebelum waktu tidur jika Anda sensitif terhadap gangguan tidur. Jika melacak total kumulatif penting, catat sajian di aplikasi seperti CoffeeLog untuk melihat total harian dan waktu konsumsi.

Ekstrak teh hijau dan suplemen

Ekstrak teh hijau mengonsentrasikan polifenol dan kadang-kadang kafein; dataset tidak mencantumkan dosis ekstrak spesifik, jadi baca label produk. Ekstrak dapat memberikan jauh lebih banyak kafein per sajian dibandingkan secangkir seduhan, dan beberapa ekstrak dosis tinggi dikaitkan dengan laporan cedera hati yang jarang—konsultasikan dengan tenaga medis sebelum memulai suplemen dosis tinggi. Selalu lacak jumlah mili-gram suplemen sama seperti minuman.

Kesimpulan dan pelacakan

Teh hijau seduhan rendah kafein (28 mg/240 ml) dibandingkan kopi. Matcha secara berarti lebih tinggi (70 mg per 1 tsp). Gunakan pilihan penyeduhan untuk mengatur kafein naik atau turun, dan ingat kafein bertahan lama: kira-kira setengahnya tersisa setelah 5.7 hours. Untuk total harian dan penjadwalan yang presisi, catat minuman dan suplemen di CoffeeLog atau pelacak serupa.

Sumber dan otoritas yang dikutip

Poin data di atas berasal dari entri komposisi minuman (dataset bergaya USDA FoodData Central) dan disajikan berdampingan dengan panduan klinis dari U.S. Food and Drug Administration, European Food Safety Authority, Mayo Clinic dan American Academy of Pediatrics untuk konteks keselamatan.

How much caffeine will be caffeine be in my body after drinking two cups of green tea?

Two standard 240 ml cups of brewed green tea deliver 56 mg of caffeine immediately; that value comes from the dataset (28 mg per 240 ml cup, per USDA FoodData Central).

Using a first-order elimination model with a population-average half-life of 5.7 hours (decay model used here), about 56 × 0.5^(6/5.7) ≈ 56 × 0.485 ≈ 27 mg remains after six hours and roughly 56 × 0.5^(12/5.7) ≈ 56 × 0.235 ≈ 13 mg remains after twelve hours.

Double serving is two standard 240 ml cups.

Step-by-step arithmetic helps: start = 2 × 28 mg = 56 mg (USDA FoodData Central); fraction remaining after 6 h = 0.5^(6/5.7) ≈ 0.485; remaining = 56 × 0.485 ≈ 27 mg. If you want a live readout for a specific clock time, use our caffeine half-life calculator to enter dose times and see mg left now.

How many brewed green tea cups equal one matcha serving in caffeine?

One 1-tsp matcha serving has 70 mg of caffeine and a 240 ml brewed green tea cup has 28 mg, per USDA FoodData Central, so one matcha equals 70 ÷ 28 = 2.5 brewed cups by milligrams.

Put another way: two brewed cups (56 mg) still fall short of a single matcha (70 mg), while three brewed cups (84 mg) exceed it.

Equivalence is a straight milligram comparison.

That 2.5× rule is useful when choosing between matcha and brewed tea for a target milligram dose; see our matcha guide for menu examples at Matcha Caffeine: Understanding Your Green Tea Boost and the general green tea guide at Green Tea Caffeine: Comprehensive Nutrition Guide.

Can I mix matcha and coffee, and how do I total the caffeine safely?

You can add milligrams from different drinks: for example, a 1-tsp matcha (70 mg) plus a 240 ml drip coffee (96 mg) totals 166 mg immediately, using dataset values from USDA FoodData Central.

To judge safety, compare cumulative milligrams to guidance: the U.S. FDA cites about 400 mg/day as a general reference upper bound for healthy adults, and the European Food Safety Authority sets 200 mg/day as a pregnancy recommendation (see U.S. FDA and EFSA 2015).

Cumulative intake is the simple sum of milligrams consumed.

Practical example and caveats: 70 mg (matcha) + 96 mg (drip coffee) = 166 mg; if you add a 250 ml Red Bull (80 mg) later the day, total = 246 mg (all dataset values per USDA FoodData Central), still under 400 mg but above EFSA pregnancy guidance of 200 mg/day. Use our safe daily limit tool to see personalized thresholds by body weight and the Caffeine Dosage Guide for situational advice.

How should I estimate caffeine if I make a more concentrated green tea (double leaf or long steep)?

If you double the leaf mass for a given 240 ml cup you should expect roughly double the caffeine: a double-strength brewed cup would approximate 56 mg (2 × 28 mg), per the dataset base value and the general extraction rule that doubling leaf mass roughly doubles caffeine.

For timing effects, the same 5.7-hour half-life model applies to concentrated brews: a 56 mg concentrated cup would leave about 56 × 0.5^(6/5.7) ≈ 27 mg after six hours (decay model used here).

Concentrated brew is a larger leaf-to-water ratio for the same cup volume.

Practical caveats: hotter water and longer steep times extract more caffeine, so the linear scaling with leaf mass is approximate; if you routinely brew stronger cups, log them as 2× or 3× servings in your tracker (for example, CoffeeLog or our half-life calculator) to get accurate cumulative totals.

How do I track multiple green tea servings spread across a workday to estimate what’s left before bedtime?

Add milligrams for each serving and apply the first-order decay to each dose separately; for example, three brewed green teas at 09:00, 13:00 and 17:00 equal 3 × 28 = 84 mg initial total (USDA FoodData Central), but at 23:00 the remaining amount is the sum of each dose’s decay from its intake time.

Specifically, remaining = 28×0.5^((23−9)/5.7) + 28×0.5^((23−13)/5.7) + 28×0.5^((23−17)/5.7) ≈ 28×0.5^(14/5.7) + 28×0.5^(10/5.7) + 28×0.5^(6/5.7) ≈ 28×0.06 + 28×0.18 + 28×0.485 ≈ 1.7 + 5.0 + 13.6 ≈ 20.3 mg remaining at 23:00, using the decay model and half-life 5.7 hours (decay model used here).

Separate-dose decay is dose-by-dose elimination.

Use our last cup before bed tool to enter actual times and see the recommended cutoff based on the Drake et al. sleep study that found caffeine taken 6 hours before bedtime reduced sleep by more than an hour (Drake et al., 2013), and combine that with the per-cup numbers from USDA FoodData Central.

Bottom line

A standard 240 ml brewed green tea contains 28 mg of caffeine and matcha (1 tsp) contains 70 mg, both values from USDA FoodData Central; caffeine follows first-order elimination with a population-average half-life of about 5.7 hours (decay model used here), so roughly half the caffeine remains after ~6 hours.

Concrete takeaways: one brewed cup = 28 mg; one matcha = 70 mg (so matcha ≈ 2.5 brewed cups). Use the decay formula remaining = D × 0.5^(hours/5.7) to convert a dose into milligrams left at later times (for example, a single 28 mg cup leaves ≈14 mg after 6 hours and ≈7 mg after 12 hours). For daily safety compare summed milligrams to authoritative guidance: the U.S. FDA cites about 400 mg/day for healthy adults (U.S. FDA) and EFSA recommends a 200 mg/day limit during pregnancy (EFSA 2015).

If you mix drinks, add the dataset milligrams (for example, matcha 70 mg + drip coffee 96 mg = 166 mg, USDA FoodData Central) and compare the total to those guidance numbers; to plan timing around sleep, remember Drake et al. (2013) showed caffeine taken 6 hours before bedtime still reduced sleep, so avoid concentrated green tea or multiple servings in that pre-bed window where sleep matters (Drake et al., 2013). For exact personal arithmetic, use our caffeine half-life calculator, the safe daily limit tool, or the last cup before bed helper to convert servings and times into mg remaining.