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I have been drinking 2 to 3 mugs (substantial mugs - 0.3 liters) of my favorite brew in the early morning to jump start my day. But lately I find that the good effect starts to wear off after 3 to 4 hours.
Now I wonder, should I brew another lot just after lunch, or will that be too much? What say you? Is it even possible to have too much coffee?
Interestingly, wine and spirits have a diuretic effect but beer, evidently, doesn't.
I have made it a habit to go on my bathroom scale every morning - still surprised how much my body weight jumps up and down. It is not that I gain 1.5 to 2 kg of fat from one day to the other, and loose it over the next day or two; it is the amount of liquids in my body.
There is no doubt: My average body weight the mornings after I enjoyed a sixpack the night before is significantly lower (probably around 1 kg, if I had taken more detail notes) than mornings when I drank only water or tea the previous night. This is in spite of the fact that a sixpack adds three liters of liquid, 3 kg of weight, to my body.
I cannot claim this to be 'scientific' and peer reviewed observations. It may just be a correlation(*), not a cause/effect. But in my case, there is definitely a correlation.
(*) Correlation vs. cause/effect:
- Dad, do you really want to wear those shoes?
- Why not? I like to dress up a little when I go out with my buddies.
- But every time you wear those shoes, you have a headache the next morning...
As a person on dialysis (my kidneys don’t work so I hardly pee at all) it is normal to gain 2 to 3 kg between treatments ( dialysis Mon Wed Fri). Liquids are heavy. We loose liquids thru respiration, perspiration and peeing. Day to day weight variations are normal and also strongly influenced but sodium intake. I recall one weight loss program citing “a pound a pickle” due to the high sodium content of a pickle. I find your unscientific observation fascinating. Our bodies are amazing machines.
I have participated in a few ultra-marathons lasting in the 50-70 hour range. Leading up to these events, I cut out caffeine completely for at least 1 month leading up to the event. I always feel better and more awake about a week without.
During the event, I use it sparingly to help me get through the night with as little sleep as possible. When used little, it has one heck of an effect.
Then after the race, I go back to my old habits and it quickly stops working and becomes a crutch to stay normal. Think I would lean after as many times as I've completed this cycle. Now to get another cup of coffee!
The health effect very much depend on how you brew the coffee. The worst alternative is boiling it the traditional way, with the coffee grounds boiling with the water. Almost as bad is boiling clear water, pull it aside and add the coffee. Espresso should not be enjoyed in large quanta either. The modern style with pods are in the middle between, but the most healthy, by far, is the filter coffee, using a paper filter.
If you make your coffee using a paper filter, you probably can allow yourself another mug for lunch. If you boil the coffee grounds for a few minutes, medicals suggest that you keep the consumption down.
(I knew one lady who seriously claimed that coffee had no taste unless boiled for at least five minutes... In modern times, she is the only one, and certainly only woman, I know to like it that way. Two generations ago, fishermen and lumberjacks used to add more water to the old grounds in the pot, adding grounds when the coffee getting too weak. They didn't clean out the pot until it was so full of grounds that there was no room for water, maybe once a week.)
My experience with both coffee and tea (strong, and in huge amounts) is that your body gradually becomes immune to the stimulating effect of caffeine. For many years, I have had strong coffee (or tea) late at night, and fallen asleep immediately when going to bed. But I discovered that me getting drowsy after a few hours of work rather was due to dehydration. Nowadays, I can drink at least a liter of water through a typical day, and that keeps the drowsiness away.