The caffeine has been shown over the years to have significant beneficial effects on the Health. From burning fat to stimulating the nervous system, the coffee It helps our body, but we also know that it is contraindicated in hypertensive people or those affected by chronic kidney disease (CKD).
In this sense, a new study suggests that the consumption of some caffeinated beverages such as coffee could be related to kidney health in elderly people. According to data from the Spanish Society of Family and Community Medicine (semFYC), there are seven million people in Spain who suffer from CKD, a condition that could be caused by factors such as diabetes, hypertension, obesity or smoking.
Caffeine is linked to poor kidney health
In addition, according to another study carried out by the Center for Biomedical Research in Network of the Physiopathology of Obesity and Nutrition and the Rovira i Virgili University of Tarragona, the consumption of caffeinated beverages such as coffee or tea could lead to ailments related to kidney health in the elderly. In fact, the analysis indicates that suffering from obesity or cardiovascular risks can, together with this type of consumption, lead to greater kidney deterioration.
Upon discovering this possibility, the scientists studied a possible association between the consumption of tea, coffee or other caffeinated beverages and decreased glomerular filtration. Finally, it was found that those who drank two daily cups of caffeinated coffee during that period of time were more affected, with a 19% higher risk of suffering kidney loss, than those who drank it occasionally.
Therefore, this study carried out on 5,851 overweight or obese older people with metabolic syndrome, has concluded that it is recommended to consume decaffeinated beverages, since caffeine could be harmful to the kidneys.
Negative effects of caffeine
The Mayo Clinic warns of the negative health effects of excessive caffeine consumption. The dangers of this excess usually appear when consumption is over four cups a day. These most common side effects include headache, nervousness, insomnia, irritability, rapid heart rate or muscle tremors.
Despite this, the only solution is not to give up coffee, but the key for experts is not to abuse it, because it also has healthy aspects. Recent research has shown that it may offer some protection against diseases such as Parkinson’s, type 2 diabetes, liver disease, or heart attacks and strokes.
In fact, coffee could be beneficial for brain performance. According to a study carried out by members of the University of Barcelona and the Pi i Sunyer Biomedical Research Institute (IDIBAPS), it showed that “the synergistic effects of caffeine and glucose can benefit sustained attention and verbal memory”. In fact, the analysis highlights that it presents improvements in attention, learning and the consolidation of verbal memory.
Other counterproductive effects
The recommendation changes in the case of pregnant women and people with cardiovascular problems or high blood pressure, who are advised to limit their consumption. In the case of the former, “it is recommended to reduce consumption, establishing the maximum recommended at 200 milligrams throughout the day,” specifies Dr. Montoya.
These measurements are translated as follows. According to the expert, a 150 milliliter coffee contains between 60 and 80 milligrams of caffeine and a tea of the same size between 40 and 50 milligrams. For its part, a 330-milliliter cola drink includes between 30 and 40 milligrams of caffeine. In addition, 50 grams of dark chocolate or milk chocolate provide between 20 and 30 milligrams of caffeine and between 10 and 15, respectively.
When the recommended dose is exceeded, “three cups of coffee is considered a moderate amount and six cups an excessive amount,” Dr. Montoya clarifies, that is when the damages appear. “Insomnia, dizziness, high blood pressure, dehydration and dependence”, quotes the specialist in Nutrition and Endocrinology. On the other hand, stopping caffeine causes withdrawal syndrome or ‘mono’. “It is characterized by fatigue and headache,” says Dr. Montoya, but “usually is overcome in a few days.”