However, some people need to limit the amount of coffee they consume. Large amounts of coffee can be associated with lung cancer and may aggravate heart problems.
Nevertheless, here are 4 reasons to have another cup of coffee:
People who drink coffee live longer. A review of 20 studies, which involved more than 970 000 people, showed that people who usually drink more coffee have a 14% less relative risk of premature death from any cause, compared with those who drink less coffee.
Even the consumption of one to two cups of coffee a day reduces the risk of premature death by 8%. People who drank two to four cups of decaffeinated coffee per day had a 14% lower relative risk of premature death than those who did not drink coffee at all.
People who drink coffee, especially men, have a lower risk of developing liver cancer. This is particularly important considering the fact that liver cancer is the sixth most common form of cancer in the world and is more common in men.
The results of six studies, based on the total number of consumed cups of coffee per day showed that the relative risk of developing liver cancer is reduced by 14% with each additional cup of coffee.
Studies show that natural compounds found in coffee, as kahweol and cafestol, are a direct protection against the occurrence of cancer and have anti-inflammatory properties.
It seems that coffee has the ability to strengthen the biochemical processes in the liver that protect the body from toxins, including aflatoxin and other carcinogen ingredients.
3.Type 2 diabetes
People who drink coffee reduce their risk of type 2 diabetes. In 28 studies that included over a million people, it has been shown that those who drink three or more cups of coffee a day had a 21% lower relative risk of type 2 diabetes compared to those who never drank or rarely drank coffee. In the case of those who drank six or more cups a day, the relative risk was reduced by 33%.
Interestingly, the risk was also reduced among those who drank regular coffee and those who drank decaffeinated coffee. Each additional cup of regular coffee (with caffeine) reduces the relative risk of developing diabetes by 9%, and in the case of decaffeinated coffee- by 6%.
The active components of coffee help reduce oxidative stress – the imbalance between free radicals and antioxidants. Coffee contains chlorogenic acid that improves glucose metabolism, and insulin and caffeine acid sensitivity, which increases the use of glucose from the blood by the muscles, and also stimulates the immune system and has anti-inflammatory properties.
People who drink coffee are less susceptible to prostate cancer. The analysis of 13 studies, which included more than 530.000 men, showed that those who drank more coffee had a 10% lower relative risk of developing prostate cancer compared to those who drank less coffee.
And now, a few reasons why you should take care of the amount of coffee you consume:
Reduce the amount of coffee to reduce the risk of lung cancer. Studies, which included over 100 000 adults, showed that those who consumed coffee the most, had a 27% higher relative risk of developing lung cancer. Every additional two cups of coffee a day, are associated with 11% greater risk of developing lung cancer.
Drinking one to two cups of coffee a day during the pregnancy is not as risky as it was previously thought, but you still need to be careful.
The link between coffee and the risk of spontaneous miscarriage and other adverse outcomes, which was discovered in older studies, was probably due to the fact that the research had been improperly conducted, especially when it comes to low birth weight babies and birth defects.
Also, it seems that smoking cigarettes, a habit which often goes along with coffee, had not been adequately assessed, so some of the risks found are probably due to smoking.
The American College of Obstetrics and Gynecology advises pregnant women to drink less than 200 mg. caffeine a day (one cup of instant coffee contains 50-100 mg. caffeine, and a cup of boiled coffee 100 -150 mg).
Large amounts of caffeine increase the blood pressure for a short time, as well as homocysteine – which is another risk- factor for heart disease.
People who have high blood pressure or some kind of heart disease, the elderly, adolescents, children and those who do not usually drink coffee are more sensitive to caffeine from energy drinks and cola drinks, and they will take longer to metabolize the coffee.
It is important to note that most studies related to coffee measure the relation, not the causal relation – it is partly due to the fact that it is difficult to do a controlled research related to the increased consumption of coffee and to measure its impact on health, during a longer period of time.