4
votes
2answers
98 views

Multiple tea infusions and caffeine concentration

I have read conflicting things about the volatility and solubility of caffeine, and at what point during the tea brewing process caffeine is released. When tea is used for multiple infusions, such as ...
3
votes
2answers
161 views

All else held equal, does a pot of tea have more total caffeine than a mug?

Let's say you have one tea bag and can either brew it in a mug of boiling water, or a larger tea kettle of boiling water. The temperature, steeping time, type of tea bag, etc. are held constant. ...
14
votes
3answers
8k views

Does black tea have the the highest level of caffeine? If so, why?

So it's usually said that tea in general has lower levels of caffeine than coffee and that black tea has more caffeine than green tea (which has more caffeine than white tea). This suggests that the ...
1
vote
1answer
224 views

Is there any caffeine in kuding tea?

Does anyone know if the bitter kuding tea (苦丁茶) contain caffeine?
2
votes
2answers
234 views

Which Type of Japanese Green Tea Has the Highest Amount of Caffeine?

I am trying to find the best pick-me-up Japanese green tea and was wondering which type was the best to get from the assortment of Sencha, Gyokuro, Kabusecha, Bancha, etc.
5
votes
7answers
18k views

Does brewing tea for longer result in higher caffeine content?

The ISO standard for brewing tea says "6 minutes". Of course different teas have vastly different properties, but... For "average commodity black tea" and "average commodity green tea", will leaving ...
10
votes
7answers
1k views

Bagged or Loose Leaf Tea

What are the practical differences between using bagged vs. loose leaf tea? Are there differences in quality, caffeine content, etc.? Why?
3
votes
3answers
359 views

Similar flavors to caffeine?

My wife and I enjoy drip coffee, french pressed coffee, espresso, black tea, green tea, and just about anything caffeinated. However, my wife wants to avoid caffeine due to its physiological effects. ...