A new study by researchers at the Universities of Bielefeld and Warwick has confirmed the link between morning caffeine consumption and improved mood.
The study, which followed 236 young Germans, found that participants who drank caffeinated beverages reported feeling happier and more enthusiastic in the early hours of the day. This effect, which was apparent immediately, lasted for approximately 2.5 hours.
The study’s authors explained that caffeine’s positive effects are due to its action on adenosine receptors, which causes an increase in the activity of dopamine, a key neurotransmitter for well-being, in specific areas of the brain.
Although the researchers noted that the impact on reducing sadness and overall well-being was minor, they considered it significant.
The study ran for four weeks, with participants completing questionnaires seven times a day on their phones to report their mood and caffeine consumption in the previous 90 minutes.
Consumption of this substance is common among around 80% of adults worldwide, and its impact is even observed in nature, as some bees prefer nectar containing it.
It’s important to note that, although variations were expected based on participants’ anxiety or depressive symptoms, the study showed that the relationship between caffeine and positive emotions was consistent across all groups.
This occurred regardless of each person’s habitual consumption level or sleep problems. The researchers suggested that, for regular users, part of the positive effects could be the reversal of mild withdrawal symptoms, which disappear with the first cup of the day.
Beyond the mood: other benefits and recommendations
In addition to its impact on mood, research highlights other health benefits associated with caffeine consumption, largely due to its antioxidant properties.
Coffee polyphenols have been shown to cross the blood-brain barrier, which could have anti-inflammatory effects on the brain and promote neurogenesis, reducing the risk of cognitive disorders.
Regular consumption has also been linked to a lower risk of developing chronic diseases such as type 2 diabetes, heart disease, Parkinson’s disease, dementia, and colorectal cancer.
Experts, however, recommend moderate consumption: no more than 400 milligrams per day, equivalent to about four cups of coffee.
To optimize the mood-enhancing effects without interfering with hormone levels, it’s suggested to drink the first cup between 60 and 90 minutes after waking up, when cortisol—the stress hormone—begins to decline. It also warns of possible adverse effects such as insomnia, palpitations, and digestive problems, emphasizing the importance of balance.
