Coffee, is it good or bad for overall cognitive health? According to research, it depends on the amount of coffee you drink.
(Mayo Clinic) Recent research shows mixed messages regarding caffeine’s impact on brain health. Some reports suggest that caffeine can elevate your mood and potentially decrease the likelihood of developing Alzheimer’s, Parkinson’s, and other neurological conditions, particularly when consumed through coffee or tea.
Conversely, other outlets caution that caffeine may reduce brain volume and heighten the risk of dementia.
You might find yourself questioning the true effects of caffeine: Is it beneficial for the brain, or does it pose risks?
The reality is more complex than a simple yes and no. The cognitive advantages of caffeine versus its potential drawbacks depend on various factors, such as the amount consumed, the method of consumption, and individual metabolic differences, according to Dr. Donald D. Hensrud, an associate professor of nutrition and preventive medicine at the Mayo Clinic College of Medicine.
When caffeine enters your system, it typically takes about an hour to travel from ingestion to your bloodstream and brain, where it begins to produce several biological effects. These effects include an increase in stomach acid production, contractions in the colon that can stimulate bowel movements, constriction of blood vessels, and a rise in urine output.
Drinking coffee may provide several health advantages, including a lower likelihood of developing: Liver disease, Liver cancer, Type 2 Diabetes , Gallstones, Gout, Various types of cancer, and potentially reduced overall mortality. (Mayo Clinic)
Coffee can also lead to various unwanted effects, including heartburn and digestive issues. There are also concerns about fertility, with issues such as difficulty getting pregnant, miscarriage, and negative pregnancy results like low birth weight and preterm deliveries. Additionally, caffeine has a mild addictive quality that might cause withdrawal headaches if you suddenly cut back on it.
Upon reaching the brain, caffeine acts similarly to adenosine, a neurotransmitter known for calming the nervous system. As you go about your day, adenosine accumulates as your cells break down adenosine triphosphate (ATP) to generate energy. These adenosine molecules interact with specific receptors (A1 and A2A) in the brain. Once enough adenosine binds to these receptors, feelings of relaxation set in, motivation decreases, and fatigue may take over. (Mayo Clinic)
There may be a link between caffeine intake and an increased risk of dementia, as well as studies highlighting caffeine’s role in reducing the likelihood of cognitive disorders. For instance, an analysis of MRI data from over 17,000 individuals revealed that those consuming more than six cups of coffee per day had smaller brain volumes and a 53% greater risk of being diagnosed with dementia compared to those having one or two cups a day.
However, other comprehensive reviews have aggregated data from 141 meta-analyses involving hundreds of thousands of participants and found a correlation between coffee consumption and a decreased risk of cognitive issues such as Alzheimer’s and Parkinson’s.
In instances of conflicting research, media outlets often sensationalize the findings with headlines that convey both alarm—“Caffeine increases dementia!”—and reassurance—“Coffee reduces the risk of Alzheimer’s disease!” While these headlines reflect the studies themselves accurately, they may not be reality.
Dr. Hensrud explains that it’s challenging to isolate a single dietary component like caffeine when evaluating its connection to health outcomes, as numerous other factors can influence it, like a healthy diet, lifestyle or exercise. (Mayo Clinic)
Furthermore, there’s an age-old adage: the dose determines the effect. Moderate caffeine intake might offer protective brain benefits, while excessive consumption could have negative effects, according to Dr. Hensrud.
As a widely consumed beverage, coffee, abundant in caffeine, serves as a stimulant for the central nervous system.
(tandfonline.com) In studies examining habitual coffee consumption and its effects on brain structure and dementia risk, the International Journal of Nutrition conducted research involving 398,646 participants from a UK medical database, of which 17,702 had MRI data.
After adjusting for various factors, they discovered that drinking more than six cups per day was linked to a 53% increased risk of dementia compared to consuming one to two cups daily.
So six or more cups of coffee has negative effects on cognitive health, while two cups or less cups did not, according to the referenced current research.
Ultimately, high coffee consumption appeared to correlate with reduced overall brain volume and heightened dementia risk, so have a cup, but don’t overdo it.
Video of a pour over coffee method; how to make coffee without a coffee maker.
Ref
https://www.tandfonline.com/doi/full/10.1080/1028415X.2021.1945858
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