Caffeine Does coffee lose much of its effectiveness in higher doses?

With high coffee consumption caffeine loses its effect - Is that true?
Coffee is popular with the Germans as a pick-me-up. It is often said, however, that caffeine is no longer so strong in people who drink a lot of coffee. Is that true??

Coffee lovers love their pick-me-up
For morning muffles, coffee often does not work first. In the morning fast two, three cups of hot brew and the day can begin. Coffee lovers should not rely too much on the effects of caffeine, they say. Because the pick-me-lose over time with effect. If one or two cups were initially enough to fight fatigue, it would often have to be a whole pot after prolonged consumption. Is this assumption really true?

Anyone who drinks a lot of coffee needs more and more, because the effect of caffeine decreases with high consumption, it is said. Is that true? (Image: stokkete / fotolia.com)

"Felt effect lessened"
"The felt effect diminishes," Dr. Tomislav Majic from the Psychiatric University Hospital of the Charité in the St. Hedwig Hospital (Berlin) in a message from the dpa news agency. However, this effect occurs with caffeine only at high daily doses and is significantly less pronounced than with alcohol or illegal drugs.

In this context, one speaks of the so-called tolerance development: "The same dosage has a lesser effect or for the same effect you have to eat more," says Majic. However, this habituation is reversible: "If you reduce the coffee consumption again, less caffeine would have more effect after a while."

Little sleep affects the effects of caffeine
The effect of caffeine is also influenced by the particular night's sleep. For example, American researchers recently reported in the journal "American Academy of Sleep Medicine" that after only a few nights with bad sleep, coffee has no effect. (Ad)