Leaving coffee overnight may not bring the calm I expected. Although decreased caffeine consumption may have positive effects on mood and long-term anxiety, the first days may be marked by irritability, tiredness and mood changes.
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28/09/2026
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Sthere are several effects caffeine has on the body. In addition to keeping you awake, it may also affect the level of calm and even anxiety of a person, depending on their consumption and sensitivity.
What happens to humor when coffee is reduced?
You may not feel more calm the moment you decide to trade your coffee for decaf. In fact, in the early days, you may notice a worsening of your mood.
Short-term impact
For most people, caffeine withdrawal symptoms peak within the first 1 to 2 days after cessation of consumption.
“ During this peak period of abstinence, symptoms such as mood swings are more likely, but usually improve or disappear within a week or two after caffeine discontinuation,” nutritionist Lyndsay Hall explained to Real Simple.
“ Over the first few days feelings of increased anxiety, irritability, lethargy and/or depression can be observed, while certain signaling receptors and hormones in the brain are fully regulated,” he explains.
The intensity with which this period of abstinence is felt may depend on several factors, such as the amount of caffeine that used to be consumed before, the speed with which it reduced consumption and individual sensitivity.
Long-term impact
Many people realize that caffeine temporarily increases focus and alertness. So if you stop drinking coffee, you could lose those benefits? Not necessarily. In fact, you may even notice positive changes, such as reduced anxiety, more stable energy levels and higher alertness.
“ After eliminating or reducing long-term caffeine consumption, people may notice greater stability in energy levels throughout the day, since they will no longer have temporary peaks of energy stimulated by caffeine,” Hall said.
“ Since caffeine can also disturb sleep and cause temporary insomnia in some people, improvements in sleep hygiene and sleep ability may be observed. Both factors can contribute to increased alertness and productivity.”.
Who should reduce coffee consumption?
People with higher levels of anxiety will notice an improvement in mood after reducing caffeine consumption.
“ This is because caffeine can usually increase anxiety in many people,” Hall says.
“ Caffeine temporarily blocks certain brain receptors, which results in the release of norepinephrine, triggering a fight response or escape from the central nervous system.”.
If you want to understand how caffeine affects your mood, you can gradually reduce your consumption. One of the most common suggestions is to exchange coffee for decaf.

