Actually my question is twofold:
1) Coffee dehydrates your body, and water hydrates your body. If I drink one cup of coffee, and one cup of water, and those two liquids mix…then I have two cups of coffee in me, but with the amount of caffeine in one cup of coffee. To what extent will I dehydrate / not dehydrate?
2) At home we have a senseo. I make 1 large cup of coffee with 1 coffee pad by letting the amount of water for two small cups go through the same pad. In principle, the caffeine / coffee is “finished” after the first cup. To what extent is the second cup still coffee/water? And to what extent will I dehydrate/hydrate?
Answer
Dear Lee,
It is true that coffee has a slightly dehydrating effect. Normally, however, not so much coffee is used that a cup of coffee dehydrates you. You’re still going to take in more fluid than you lose through dehydration. And this especially if you drink a glass of water after a cup of coffee.
Drinking is very important. As adults, we should drink at least 1.5 liters of water every day. This should mainly be water; coffee can be drunk as a change or supplement.
The senseo: with your way you just have a large cup of coffee that is less concentrated than the producer has in mind. The ‘second’ bag is just very diluted coffee. But you are going to hydrate your body with this and not dry it out. So if you like your coffee so much, you immediately absorbed extra water, which is very good for your health.
Coffee is part of our culture and can certainly be drunk, but preferably not all day long. Alternate with plain water. For example, people who drink 1 to 1.5 liters of coffee per day during a working day will absorb a lot of moisture, but we do not really recommend this.
Answered by
prof dr ir Greet Vansant
Nutrition and Health
Old Market 13 3000 Leuven
https://www.kuleuven.be/
.