Twinings Pure Green Decaf

Twinings Pure Green Decaf, in summary: A decaffeinated plain green: most of the caffeine removed, most of the green character kept. What decaf means, and how to brew it.

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Last reviewed by the teas.co.uk team in March 2026.

Twinings Pure Green Decaf is decaffeinated green tea: a Chinese green base run through the modern supercritical CO2 process, which removes 95 to 99% of the caffeine while keeping most of the polyphenols and flavour. Useful for evening green tea, caffeine sensitive routines, reducing caffeine intake, and as a second or third cup of the day. Mainstream pricing.

The product

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Decaffeinated Chinese green tea. CO2 decaffeination uses pressurised carbon dioxide as a selective solvent for caffeine; it is gentler than older ethyl acetate or methylene chloride methods, leaves no residue, and retains more of the catechins (EGCG, ECG, EGC) that drive green tea's character. Around 2 to 5mg residual caffeine per cup.

How it tastes

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Recognisable green tea character: vegetal, slightly grassy, mild astringency. A touch less complex than caffeinated Twinings Pure Green, since some polyphenols are inevitably lost in any decaf process, but the gap is small. Most blind comparisons call the decaf "softer" rather than worse. Curator Rating: 4.9/5.

How to brew

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1 bag in 200ml water at about 80°C, not boiling.
Cover the cup.
Steep 2 to 3 minutes only.
Drink black; honey or a slice of lemon optional.
For iced: cold brew 4 bags in 1 litre of water, fridge 6 to 8 hours, serve over ice.

Caffeine

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2 to 5mg residual per cup, down from 20 to 30mg in the caffeinated version. Negligible for sleep, so it suits evening drinking. Note that decaf means very low, not literally zero; anyone advised to avoid caffeine entirely should choose a true caffeine free herbal instead.

The decaf process, briefly

Three decaf methods exist: ethyl acetate (the cheap legacy method, which also strips flavour and polyphenols), methylene chloride (efficient, but residue concerns make it less popular), and supercritical CO2 (the modern method used here, gentlest, no residue, retaining 80 to 90% of polyphenols). Twinings does not always state the method on pack, but the Pure Green Decaf range typically uses CO2.

At a glance

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Aspect	The read
What it is	Plain green tea, decaffeinated
"Zero caffeine"	Decaf means very low, not literally zero
Trade off	Some delicacy lost in decaffeination; still pleasant
Brew	Off the boil, short, exactly like caffeinated green

Use cases

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Evening green tea when caffeine would affect sleep.
Caffeine sensitive drinkers who still want a green cup.
Reducing caffeine intake, including in pregnancy.
A second or third green of the day for those tapering caffeine.
Pairing with late evening Asian food.

FAQ

Caffeine? 2 to 5mg residual.

Vegan? Yes.

Polyphenols retained? Yes; CO2 decaf preserves around 80 to 90% of catechins.

Versus caffeinated Pure Green? Slightly softer flavour; same brewing approach.

Pregnancy? A lower caffeine option; the NHS advises keeping caffeine under 200mg a day.

Children? Fine; the residual caffeine is negligible.

Curator's note: Twinings Pure Green Decaf is a useful evening green tea option. Modern decaf process preserves character. Lee, Teas.co.uk, Tunbridge Wells.

What to buy now

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Buy Twinings Pure Green Decaf as the evening or caffeine sensitive green. Compare with caffeinated Twinings Pure Green for the daytime cup, or a true caffeine free herbal if you need zero caffeine. Browse the wider Twinings range.

From the curatorteas · Spend less on prestige, more on freshness. A two month old supermarket bag still beats a three year old gift tin.

Green tea reading

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Reference noted

The bottom line

Plain green tea with the caffeine largely removed: low rather than literally zero. Decaffeination costs a little delicacy, so it is a sensible compromise for an evening or caffeine sensitive green rather than the equal of a fresh caffeinated leaf. Brew it off the boil and short, exactly like any green; it cold brews well too.