Do you follow the rule of no coffee past midday?
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Dr. Andrew Huberman discusses this in his podcast. He suggests that caffeine should be avoided 8 to 12 hours before bedtime. According to him, drinking a cup of coffee at 2 PM is equivalent to consuming 10% of a cup right before bed. He claims that even if you feel good when you sleep, you still may not reach the REM phases as effectively.
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@oliveoil I believe it's entirely dependent on liver function, a healthy, robust liver should be able to metabolize most of the caffeine in about 10 minutes. There are things which inhibit and increase caffeine metabolism as well.
For example, a smoker will have a higher caffeine metabolism due to the acceleration in its demethylation (it also increases xanthine oxidase activity).
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Spot on!
Caffeine and the health of the liver in detoxifying (for lack of a better word) caffeine plays s large role in having good sleep, yet there are other factors as well, such as having a stable supply of energy to power sleep, as well a state of calm enabled by GABA and the absence of serotonin in our brsin that disturbs our mental well-being and sleep.
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No, not midday. I won't have any coffee after 5 pm. The reason is caffeine's half-life of roughly 6 hours. I want my caffeine concentrations to be rather low towards bedtime. But that can be achieved much later than midday. I still have a cup of coffee around 3:30-4:00 in the afternoon.
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I used to drink two cups a day, in the morning and after lunch. But after my son was born I started drinking another cup after work, sometimes between 5-6 PM to help me stay up a bit for evenings to help my wife out with the baby.
I found that I can still sleep well enough even with that late coffee, so sometimes I'll make a cup if I feel like it. I think it really varies from person to person though and I just generally go by feel, if I have work the next day and need to get up early I might skip out on it but if it's the weekend why not?
My morning and evening cups are usually with milk while my lunch coffees are usually espresso with a bit of sugar. If that makes a difference.
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