The effects of coffee on the body are complex and diverse, it is good to disentangle the truth from the false and to take some precautions of consumption and use.
The effects of coffee on the body come from caffeine, an active ingredient that is also found in tea, sodas, but also chocolate and certain food preparations. This pharmacologically active substance is the most widely consumed in the world (120000 tonnes per year).
Caffeine is a substance that is able to cross the blood-brain barrier that prevents certain substances from passing blood to the brain . Upon reaching the brain, caffeine will bind to the adenosine receptors and prevent the adenosine itself from attaching itself to it. Caffeine therefore acts by neutralizing adenosine which results in disinhibition and an increase in brain activity. In addition, caffeine results in the release of adrenaline , dopamine (and glucose in the liver ), resulting in an increase in heart rate and blood pressure ,
Caffeine has demonstrated positive effects on the urogenital apparatus. Not only does it promote better sperm motility , but a consumption of 3 cups per day improves the volume of urine without altering the urine output peak. Same on the liver side . Two cups of coffee per day reduce the risk of cirrhosis by 40% . Coffee would also protect against liver cancer and reduce the risk of cancer of the mouth , pharynx and esophagus. It would relieve migraines and chronic headaches , regulate blood sugar and blood sugar and transit.
If coffee has positive effects on health, it also has negative effects. According to some studies, the higher the caffeine consumption, the higher the risk of bladder , colon and rectal cancer . Abusive consumption of coffee would promote conjunctivitis , rhinitis , asthma and atopic dermatitis . It would increase cholesterol , promote hypertension, and cause eye pressure problems in people at risk for glaucoma . It would increase the risk of coronary heart disease , miscarriages and births, Stillbirths … More than 6 cups a day would increase the risk of meningeal haemorrhage in cerebral aneurysm carriers . Finally, coffee negatively affects the quality of sleep .
Coffee has interesting medical properties. But like all substances, it is better not to abuse it and limit its consumption to 2 or 3 cups per day. Beyond that, in addition to its well known impact on sleep, it may indeed have a deleterious effect on health.