The habit of drinking coffee upon waking up may be causing afternoon tiredness. This is a conclusion resulting from the analysis of the role of two substances in the body: cortisol and adenosine.
The article explains that the human body reaches its natural cortisol peak upon waking, a hormone responsible for keeping the body awake and alert naturally. Drinking coffee at this time coincides with this peak, which constitutes a biological error.
The reason for this error lies in the interaction between coffee and adenosine. When coffee is consumed at this time, the body cannot recognize the need to produce more energy, which can result in fatigue later, during the afternoon.
The article suggests that knowing the appropriate time to have the first cup of coffee can help avoid afternoon tiredness, although it does not specify what that ideal time is.
