What Are Green Teas?
Green tea is unoxidised — harvested, quickly heated (steamed or pan-fired), and dried to preserve its natural green state. The result is a lighter, cleaner-tasting cup with noticeably lower caffeine than black tea, along with a high concentration of antioxidants, particularly EGCG (epigallocatechin gallate).
At Oasis Teaz, our green tea collection is sourced from the hills of Darjeeling and the high-altitude Chabessey estate — two origins that produce exceptional loose leaf and powdered green teas with genuine terroir.
Green Teas Caffeine — How Much Are You Actually Getting?
Green teas caffeine content varies more than most people realise — depending on leaf grade, origin, brew time, and water temperature.
Tea Type Caffeine per 8 oz Cup
Matcha (whisked) 60–80 mg
Loose leaf green tea 20–45 mg
Black tea 40–70 mg
Coffee (drip) 80–120 mg
Matcha delivers more caffeine because you consume the whole ground leaf — nothing is strained out. Loose leaf green tea, by contrast, gives a gentler, more gradual lift. If you're caffeine-sensitive, loose leaf is the safer start. If you want sustained focus without coffee's spike, matcha is the better call.
Green Tea Powder vs Matcha — They Are Not the Same Thing
This is one of the most common points of confusion in the US market, and it matters when you're buying.
Green tea powder is made by grinding standard green tea leaves into a fine powder. Quality varies widely — colour is often dull olive-green and flavour can be bitter or flat.
Matcha is a specific category of shade-grown green tea, ground into an ultra-fine powder. The shading process (done 3–4 weeks before harvest) forces the plant to produce more chlorophyll and L-theanine, giving matcha its vivid green colour, umami depth, and the calm-but-focused mental state it's known for.
Zenful Matcha Green Tea from Oasis Teaz is true matcha — not powdered green tea repackaged in a matcha-style bag. The difference shows in the colour, the froth, and the flavour.
Meet the Green Teas in This Collection
Rejuvenate Chabessey Green Tea
Sourced from the Chabessey estate in Darjeeling, this is a classic loose leaf green tea — delicate, slightly grassy, with a clean floral finish. Lower caffeine than matcha, making it ideal for afternoons or those reducing their caffeine intake. Works beautifully with a squeeze of lemon or a few slices of fresh ginger.
Zenful Matcha Green Tea
Our ceremonial-grade matcha, sourced from shade-grown leaves and stone-ground for a smooth, vibrant cup. No bitterness. No grassiness. A sustained, calm energy — the kind that comes from L-theanine and matcha's caffeine working together rather than competing. Whisk with hot water or blend into a latte.
Looking for Oasis Matcha? Zenful Matcha Green Tea is our signature matcha — find it here in this collection or search "Oasis Matcha" on our site.
How to Brew Green Tea — Temp & Steep Time Matter
The single biggest brewing mistake with green tea: water that's too hot. Green tea is delicate. Boiling water scalds the leaves and produces a bitter, astringent cup that tastes nothing like what the tea is capable of.
Loose Leaf Green Tea (Rejuvenate Chabessey)
Parameter Recommendation
Green tea brew temp 75–80°C (167–176°F)
Green tea steep time 2–3 minutes
Quantity 1 tsp per 8 oz
Re-steeps Up to 2–3 times
Matcha (Zenful Matcha)
Parameter Recommendation
Water temp 70–75°C (158–167°F)
Sift first Always — prevents clumping
Whisk ratio 1 tsp matcha : 2 oz water
Whisk motion Brisk W or M pattern, 30 seconds
A simple rule: if your green tea is bitter, your water was too hot or your steep was too long. Drop the temperature by 5°C and reduce steep time by 30 seconds — you'll notice the difference immediately.
Green Tea for Kidney Health — What the Research Says
One of the most-searched questions around green tea in the US: is green tea good for kidneys?
The short answer is yes — in moderate amounts. Green tea's antioxidants (particularly EGCG) have been associated with reduced oxidative stress in renal tissue in several studies. For healthy adults, 2–3 cups per day is generally considered safe and potentially beneficial.
The caveat: green tea contains oxalates, and very high consumption (8+ cups daily) may contribute to oxalate buildup in those already prone to kidney stones. If you have a pre-existing kidney condition, check with your physician before making green tea a daily staple. For most people, 2 cups a day of Rejuvenate Chabessey is a reasonable, enjoyable habit with no downside.
Ways to Drink It — Green Tea Lemon & Green Tea Ginger
Green tea's clean, slightly grassy flavour pairs exceptionally well with two add-ins that also happen to amplify its health properties:
Green Tea + Lemon
Adding lemon to green tea increases the bioavailability of its catechins — meaning your body absorbs more of the antioxidants per cup. Use fresh lemon juice (not bottled), added after brewing, not during, to protect the Vitamin C from heat degradation. Works especially well with Rejuvenate Chabessey served chilled.
Green Tea + Ginger
Ginger adds warmth, digestive support, and a spice note that cuts through green tea's grassiness. Brew the tea first, then steep a few thin ginger slices in the warm cup for 2 minutes. A pinch of black pepper activates ginger's gingerol compounds further. A natural fit for cold mornings or post-meal digestion.
Frequently Asked Questions
How much caffeine is in green tea?
Green tea caffeine ranges from 20–45 mg per 8 oz cup for loose leaf varieties, and 60–80 mg for matcha, where you consume the whole ground leaf. Both are significantly lower than coffee, making green tea a practical choice for those moderating caffeine without eliminating it.
What is the right green tea brew temperature?
Brew loose leaf green tea at 75–80°C (167–176°F). Matcha is best at 70–75°C (158–167°F). Boiling water scalds green tea leaves and produces bitterness — always let the water cool for 2–3 minutes off the boil before pouring.
How long should I steep green tea?
Green tea steep time is 2–3 minutes for most loose leaf varieties. Matcha is whisked, not steeped. Steeping beyond 3 minutes increases tannin extraction, which adds astringency. If you prefer a lighter cup, pull the leaves at 90 seconds.
Is green tea good for kidneys?
For healthy adults, 2–3 cups of green tea daily is generally considered safe and may support kidney health through antioxidant activity. Those with existing kidney conditions or a history of kidney stones should consult a doctor, as green tea contains oxalates in moderate amounts.
What is the difference between green tea powder and matcha
Matcha is shade-grown, stone-ground, and produces a vibrant green colour with a smooth, umami-forward taste. Generic green tea powder is made from standard leaves, varies widely in quality, and often tastes flat or bitter. Zenful Matcha is genuine matcha — not a substitute.
Can I add lemon or ginger to green tea?
Yes — and both are beneficial. Lemon increases catechin absorption; ginger adds digestive support and balances the grassy notes in loose leaf green tea. Add both after brewing to preserve their active compounds.
