Reply to thread

I don't think this has ever been discussed, but it might be important for those of us that often wake up from sleep.

Oral contraceptive contain estrogen and progestin, (progestin is an analog of progesterone) which have been shown to increase the elimination half life of caffeine from 5-6 hours up to 10.7 hours.

Since many of use add in hormones like progesterone, and our estrogen levels  varies, the eliminate half life of caffeine will also vary. 

10-11 hours for caffeine elimination means one should not consume caffeine after what, 10AM?  A lot different than I assumed should be 5 hours for caffeine half life.

Caffeine is in a lot of things, this is something to think about.