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Coffee control pay attention to the least suitable for drinking coffee in the morning.

Published: 2026-03-16 Author: World Gafei

Last Updated: 2026/03/16, The first thing many people do when they wake up in the morning is to have a good cup of coffee. It is said that this habit can keep people energetic throughout the day, but scientific research has shown that the body has higher levels of cortisol in the morning. Drinking coffee at this time will lead to less cortisol produced by the body and more reliance on caffeine as a substitute. The best time to drink coffee is from 10:00 to noon.

The first thing many people do when they wake up in the morning is to have a good cup of coffee. It is said that this habit can keep people energetic throughout the day, but scientific research has shown that the body has higher levels of cortisol in the morning. Drinking coffee at this time will lead to less cortisol produced by the body and more reliance on caffeine as a substitute. The best time to drink coffee is from 10:00 to noon and from 2pm to 5pm. (source: fortune Chinese website)

Coffee science has often proved that some deep-rooted habits of human beings are actually wrong. The habit of being challenged this time is to drink coffee in the morning.

According to YouTube science channel ASAP Science, morning is one of the worst times for coffee. The reason is that the body has higher levels of cortisol in the morning.

Drinking coffee with high cortisol levels can cause two problems. First, caffeine interferes with the body's production of cortisol, a hormone that the body releases whenever it is stressed and hypoglycemia occurs. Drinking coffee causes the body to produce less cortisol and is more dependent on caffeine as a substitute.

Another effect is more common among people who drink coffee in the morning: this habit increases the body's tolerance to caffeine because caffeine replaces cortisol's naturally induced energy boost rather than adding energy.

Keep in mind that a 2009 study showed that the body had higher levels of cortisol in three periods except in the early morning. So the best time to drink coffee or caffeine is between 10:00 and noon, and between 2pm and 5pm.

People who are used to drinking coffee in the morning should consider adjusting the time to further optimize their caffeine intake. The first thing to do when you wake up in the morning may be to have a nice cup of coffee, but it turns out it doesn't work.

Translator: Liu Jinlong / Wang Hao