Pu er shu cha and caffeine

This topic has 5 replies, 5 voices, and was last updated 13 years, 10 months ago by CHAWANG.

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- 2012.02.06 at 12:09 pm #8440
  
  Alexargon
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  It is a common thought the idea of low or even no content of caffeine in pu er shu cha. Is it true? I really can’t find any trusted paper on it…
- 2012.02.06 at 2:56 pm #9244
  
  Leo
  Participant
  
  I know. I think that’s because puer is a tea pretty new to international scientists that they are not aware of the need to study it yet.
  
  There are, however, a few studies in China involving the observation of caffeine levels in shu cha. They do find various forms of caffeine in puers, and in a particular study even similar ones as that in roasted coffee beans): SHE Gai-Mei et al, The occurrence of 8-oxocaffeine and pyrimidine alkaloids in Pu-erh ripe tea, Acta Botanica Yunnanica, 2007, 29 (6) 713~6
  
  I think the conclusion in another study is more in agreement with our logical assumptions: that the level of caffeine very gradually lowers as the fermentation progresses, but the end product still contain substantial amount of caffeine (from 3.38% of total dissolvable content to 2.23%): The effects of Asperigillus on Post-fermentative Process of Pu-er Tea, Acta Botanica Yunnanica, 2008, 30(5) 624~8
  
  These reports are only in Chinese and I have not found any concerning the content change as the tea matures
- 2012.02.07 at 7:19 pm #9248
  
  Alexargon
  Participant
  
  Thank you Leo! I’ll look for more papers as they come out!
- 2012.02.11 at 4:45 am #9253
  
  Sara M
  Participant
  
  What about using decaf tea?
- 2012.02.13 at 4:59 am #9257
  
  Manila Tran
  Participant
  
  Until there is a big improvement in the decaf production process, I think there is no decaf tea in this world that tastes good.
- 2012.02.13 at 1:52 pm #9258
  
  CHAWANG
  Participant
  
  real old pu erh tea okay to drink at night before going to sleep. i drink 20 yrs old loose tea all the time night time.
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