![]() ![]() But for some it can be as little as a half hour. “A half-life of five hours is the average for the population. And among some the half-life is of course shorter or longer than average. Spigset explains that the effect of caffeine as a stimulant is still there after it is halved. After ten to 15 hours there is no longer enough left to have an impact.” “The time it takes for the caffeine level to drop by half is an average of five hours. Olav Spigset says that the half-life of caffeine varies. In the coffee context it is the time it takes for a concentration of a substance to be converted an digested or released from the body by 50 percent. Five-hour half-lifeĪ common term in chemistry and pharmacology is half-life. ![]() ![]() He explained that caffeine can disturb a night of sleep in intricate ways. We asked Olav Spigset, a researcher and professor at the Norwegian University of Science and Technology’s (NTNU)’s Department of Laboratory Medicine, Children’s and Women’s Health. But does caffeine decompose in the body at different rates, making this stimulant last longer in some than others? There are big differences in how alert we become from caffeine, as our tolerances for the drug are individual. Others say they spin like a top on the mattress if any less than half a day as passed since their last latte. Some seem to be able to drink cup after cup, even right before going to bed, with no problems. Many Norwegians wouldn’t think of letting a day pass without getting their jolt of java. Norwegians are said to be second only to Finns in world coffee consumption per capita. ![]()
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