Tea & Coffee Deep-Dive — VitaNova Life

Reading the Table

Values are per standard serving (coffee ≈ 240 mL drip / 30 mL espresso; tea ≈ 240 mL brewed 3–5 min). Polyphenol amounts vary by leaf, brew time and water temperature — these are typical-cup ranges. Daily caffeine ceiling: ≤ 400 mg for healthy adults, ≤ 200 mg in pregnancy.

	Beverage	Caffeine	L-Theanine	Key Polyphenols	Best For
	☕ Espresso 30 mL shot	63 mg	—	Chlorogenic acid (high)	Quick alertness, post-meal
Highest caffeine per mL but lowest per serving. Shorter brew time = less chlorogenic acid extracted than drip. Italian heritage: post-meal. Highest caffeine densityChlorogenic acid
	☕ Drip Coffee 240 mL	95-200 mg	—	Chlorogenic acid 70-200mg	Sustained morning alertness
Brew temperature 90–96°C, 4–6 min. Lighter roasts retain more chlorogenic acid (antioxidant) but slightly more caffeine. Filter paper removes cafestol/kahweol (LDL-raising diterpenes) — important for cardiac patients. Use a filter3-5 cups = lowest mortality (cohort)
	🧊 Cold Brew 240 mL	153-238 mg	—	Chlorogenic acid (slightly less)	Smoother, lower acidity
12–24h cold steep at coarse grind. Lower bitter compounds = perceived smoother; lower titratable acidity = friendlier on sensitive stomachs. Often diluted 1:1, so concentrate is higher in caffeine. Less aciditySmoother flavour
	🥤 Instant Coffee 240 mL	60-80 mg	—	Chlorogenic acid (reduced)	Convenience
Spray-dried, retains most caffeine but loses some volatile aromatics and polyphenols. Higher in acrylamide than fresh coffee. Convenience
	☕ Decaf Coffee 240 mL	2-15 mg	—	Chlorogenic acid intact	Polyphenols without caffeine
Swiss Water Process is solvent-free. Decaf retains most antioxidants of regular coffee — useful for sensitive sleepers, pregnant, anxiety-prone or hypertensive consumers. Swiss Water = no solventsPolyphenols intact
	🍂 Black Tea Camellia sinensis fully oxidised	40-70 mg	5-15 mg	Theaflavins · Thearubigins	Cardiovascular · gentle alertness
Brew 95°C, 3–5 min. Adding milk binds some theaflavins, modestly reducing antioxidant absorption. Meta-analyses show 3+ cups/day associated with lower cardiovascular event rate. Theaflavins3+ cups/day cohort benefit
	🍵 Green Tea Steamed / pan-fired	20-40 mg	15-30 mg	EGCG 50-100mg · Catechins	Calm focus · cancer cohort data
Brew 70–80°C, 2–3 min. Hotter water makes it bitter (over-extracts catechins). EGCG + L-theanine combo gives the famous "calm alert" state — both pass blood-brain barrier. Avoid extract supplements above 800mg EGCG/day (liver concern). EGCGCalm focusBrew at 80°C
	🍃 Matcha Whole-leaf powder	60-80 mg	20-40 mg	EGCG ≈ 134mg · Chlorophyll	Highest catechin density
You consume the whole leaf — 3× the catechins of brewed green tea. Shade-grown for higher L-theanine. Ceremonial grade = brighter green, less bitter. Brew 80°C with bamboo whisk. Whole-leafShade-grown3× catechins of brewed
	🤍 White Tea Minimally processed buds	15-30 mg	15-25 mg	Catechins (highest per gram)	Gentle hydration with polyphenols
Brew 75°C, 4–5 min. Highest catechin concentration per gram but typically brewed lighter, so per cup is similar to green. Delicate flavour pairs with food. Highest catechins/gMild
	🍶 Oolong Tea Partially oxidised	30-50 mg	10-20 mg	Theasinensins · partial catechins	Balanced caffeine + body
Mid-point of green and black on the oxidation scale. Often re-steeped 4–6 times in gongfu style; each infusion brings out different compounds. Re-steepedVersatile
	🟫 Pu-erh Microbially fermented	30-70 mg	10-20 mg	Statins (lovastatin trace), polysaccharides	Lipid profile · digestion
Aged via microbial fermentation — produces small amounts of statin-like compounds. Modest LDL reduction in small trials. Traditional after-meal Chinese tea. FermentedModest LDL effect
	🟥 Rooibos Aspalathus linearis (S. Africa)	— (caffeine-free)	—	Aspalathin · Nothofagin	Evening / caffeine-sensitive
Caffeine-free, naturally sweet. Aspalathin is unique to rooibos — animal studies suggest BG-lowering and antioxidant effects. Brew 100°C, 5–7 min. Caffeine-freeAspalathin unique
	🧉 Yerba Mate Ilex paraguariensis	30-50 mg	—	Saponins · Chlorogenic acid	Alertness without jitters
South American daily staple (Argentina, Uruguay, Paraguay). High-temperature traditional drinking has been associated with esophageal cancer risk — drink cooler. Caffeine + theobromine combo. Drink coolerCaffeine + theobromine
	🌼 Chamomile Matricaria recutita	—	—	Apigenin (mild sedative)	Evening · sleep
Apigenin binds GABA receptors weakly — likely the mechanism behind chamomile's traditional sleep-aid effect. Small RCT support in mild anxiety. Allergy risk for ragweed-sensitive people. Apigenin GABASleep ritual
	🌿 Peppermint Tea Mentha piperita	—	—	Menthol · Rosmarinic acid	Digestion · IBS · headache
Soothes the digestive tract. Avoid in GERD (relaxes lower oesophageal sphincter). For IBS specifically, enteric-coated peppermint oil capsules have stronger evidence than tea. DigestiveAvoid in GERD

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Brewing Quick-Guide

Get the polyphenols out without making it bitter.

Water Temperature Cheat Sheet

White / Green 70–80°C — hotter water makes catechins bitter

Oolong 85–90°C

Black / Pu-erh 95°C

Herbal (rooibos, chamomile, mint) 95–100°C, 5–7 min

Drip Coffee 90–96°C, 4–6 min total brew time

Espresso 90–96°C, 25–32s extraction at 9 bar

When to Drink What

Morning — coffee or black tea for fast alertness

Mid-morning focus — green tea or matcha (L-theanine smooths peaks)

Afternoon (≥ 6 h before bed) — last caffeinated cup; switch to white or oolong

Evening / wind-down — rooibos, chamomile, peppermint, decaf

Post-meal digestion — espresso (small), peppermint, oolong

Cautions

Total caffeine ≤ 400 mg/day (≤ 200 mg in pregnancy)

Tea / coffee within 1 h of iron-rich meals reduces non-heme iron absorption by 50–60%

Energy drinks combine caffeine + sugar + taurine + guarana — easy to exceed safe caffeine quickly

Caffeine half-life lengthens with some SSRIs and oral contraceptives — afternoon caffeine may disturb sleep more than expected

Unfiltered coffee (French press, Turkish, boiled) raises LDL — cardiac patients use a paper filter

The "Calm Focus" Stack

The most-studied flavour-led nootropic combo is naturally present in matcha and green tea: 60–100 mg caffeine + 30–50 mg L-theanine. L-theanine smooths the spike, sharpens attention without jitters. Easier than buying both as supplements.