English Breakfast Caffeine

English Breakfast Tea contains 40-50mg of caffeine per 200ml cup, brewed for 4 minutes from one standard tea bag. The exact figure varies by brand, Yorkshire Tea is at the higher end (50mg), Tetley is at the lower end (40-45mg), Twinings sits in between. This is the working caffeine guide for the UK's most drunk tea.

The number, broken down

"English Breakfast" isn't a single tea, it's a blend, and different brands use different ratios. The caffeine variation reflects this:

Why brands differ

• Assam content. Assam tea is higher in caffeine than Ceylon or Kenyan. Assam led blends (Yorkshire) are higher.
• Leaf grade. CTC (small pellets) extracts faster and more completely than orthodox (full leaf). Most EB blends use CTC.
• Bag fill. Premium brands typically use slightly more tea per bag. Yorkshire bags are notably full.
• Source variability. Even within one brand, batch to batch caffeine varies based on harvest conditions.

Brewing changes the number

Caffeine extraction is faster than people realise:

• 2 minutes: ~70% of caffeine extracted
• 3 minutes: ~85%
• 4 minutes: ~95%
• 5+ minutes: full extraction (mostly tannins after 4 minutes)

If you brew for only 2 minutes, your cup contains ~30mg from a Yorkshire bag instead of 50mg. Same bag, different caffeine load.

Comparison with other caffeine sources

How many cups before too much?

Daily caffeine guidelines:

• Healthy adults: 400mg/day = ~8 cups of British black tea.
• Pregnant women (NHS): 200mg/day = 4 cups of British black tea.
• Caffeine sensitive: 1-2 cups before noon; switch to decaf afterwards.
• Children: Caffeine generally not recommended; decaf or herbal preferred.

Sleep timing

Caffeine half life is 5-6 hours. Practical advice:

• EB before 2pm: fine for most sleepers.
• 2pm-4pm: may affect light sleepers.
• After 4pm: switch to decaf EB (2-5mg) or herbal.

The decaf option

For evening drinking, pregnancy, or caffeine sensitivity, modern CO2-decaffeinated EB tastes very close to caffeinated. 2-5mg residual caffeine is effectively negligible. Detailed decaf EB guide.

"Builders' tea" caffeine reality

A "proper" cup of builders' tea, strong brewed, milky, sometimes 2 bags per mug, can deliver 80-100mg caffeine. Two of these equals a coffee. Worth knowing if you drink builder's strength tea daily.

FAQ

How much caffeine in English Breakfast Tea? 40-50mg per 200ml cup, brewed 3-4 minutes.

Is EB stronger than green tea? Yes, typically 1.5-2× the caffeine.

How does EB compare to coffee? About a third to half the caffeine of filter coffee.

Does EB have less caffeine if I brew shorter? Yes, 2-minute brew has ~30% less caffeine than 4-minute brew.

Is decaf EB safe in pregnancy? Yes, 2-5mg residual is well within NHS limits.

Curator's note: most British drinkers underestimate how quickly caffeine adds up across the day. Four cups of Yorkshire Tea = 200mg. Add a coffee and you're at 280mg. Worth tracking if caffeine sensitivity matters. Lee, Teas.co.uk, Tunbridge Wells.

A natural follow-on: the English Breakfast range and everyday tea bags.

Reference noted

• EFSA Scientific Opinion on the Safety of Caffeine (2015)
• NHS guidance on caffeine

Black tea caffeine reading

• Caffeine in black tea
• the caffeine reference
• Breakfast tea pairing
• Best tea for sleep

More from the tea wiki

• Green tea
• Black tea
• Oolong tea
• White tea
• Herbal tea
• Caffeine in tea
• How to make tea properly
• Loose leaf vs teabag

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