You ask the expert: Coffee and Health

1. The last Harvard study on coffee and health seems to offer good news for the coffee drinkers. What the research found?

We have examined the relation between consumption of coffee and general mortality in study Nurses ‘Health and Health Professionals Follow-up Study, that I included whole about 130.000 volunteers I study. (1) At the beginning of the study, these men and women has been between the 40 ei 50 years. We have followed them for 18 to 24 years, to see who has died during that period, and to trace out their diet and life habits, including the coffee consumption. We have not found any relation between consumption of coffee and increase of the risk of death by any cause, the death for cancer, or it death for cardiovascular sicknesses. Also the persons who have drunk up to six coffee cups in the day were to higher death risk. This result is included within the bounds of the research that is emerging in the last years: for the general population, the evidence suggests that to drink coffee has not harmful heavy effects on the health.

2. So for coffee drinkers, is no news good news? Why is this discovery so important?

And ‘an important message because the persons have seen drinking the coffee like an unhealthy habit, long the lines of smoking and of excessive drink, and can do one sack from efforts to reduce their coffee consumption or of stopping drinking completely, even if really it likes. Our results suggest that it is required to to improve your health, it is better to concentrate on other habits, as when for example the physical activity was increasing, to stop smoking, or to eating more cereal integral.

3. Is there a superior limit for the quantity of coffee that is healthy to be drunk each day?

If you are drinking the coffee, so that tremors are obtained, to have insomnia problems, or they feel themselves put under stress and an uneasiness, further, obviously, you are drinking too much coffee. But in effects terms on the mortality or other problems of health, for example, we do not see the negative consumption effects up to six coffee cups in the day. You hold on mind that our study and in the greatest part of the studies of coffee, a coffee “cup” is one 8 – ounce cup with 100 mg of coffee, not 16 ounces that would be obtained in a great coffee to Starbucks, which has about 330 mg of coffee.

Also tender on mind that the research is typically based on coffee that is black or with a little bit ‘of milk or sugar, but not with the type of drinks to high caloric content coffees that have become popular during the last years. To 24 ounces Mocha Frappachino da Starbucks with mounted cream has about 500 calories, which it is a 25 percent of the daily calories for a person who asks for 2.000 calories in the day. The persons cannot realise for what to have a similar drink that it adds so much to their energy contribution, and they cannot compensate suitably eating less during the day. This might lead to an increase of weight during the time, which might increase in which turn the risk of diabetes of type 2, and this is one of the principal worries.

4. It is it any researches that suggests the coffee it can have some beneficent effects for the health?

During the last years they suggest the research that the coffee consumption can protect against type diabetes 2, Parkinson, cancer to the liver and hepatic cirrhosis. And our last study on the coffee and mortality discovered that the persons who were drinking regularly coffee in fact had a lightly inferior death risk for cardiovascular sicknesses compared to them that rarely was drinking coffee; this result must still be confirmed in further studies. This is a very active research zone in this moment, and is not in the phase in which he would call himself, “Opening shot to drink coffee to increase your health, even if you do not like”. But I think that the evidence is well that for the persons in general, out of few populations, like the women expectant mothers or the persons who have difficulty to check the sanguineous pressure or of the glycemia, the coffee is one of the good choices healthy drink.

5. Why does it seem like the scientists to hold flip-flop with the fact that the coffee does evil or a good for you?

Often the people think coffee so like a vehicle about the coffee. But in fact it is a very complex drink, with hundreds and hundreds of composed I diverged in him. Since the coffee contains composed different so many people, to drink coffee can lead to health results very much diverged. It can be a coupon for some things and evil for some things, and this is not necessarily a flip-flop or inconsistent. Few foods are good for everything. That is why we do studies on the health very specific effects, for example, the studies of as coffee influences the diabetes risk, but also to lead studies as that more recent looking at the consumption of coffee and mortality for a long period of time, which better reflects the general health effect.

The coffee is also a little ‘more complex for the study of some other food products. To drink the coffee goes often together together with cigarette smoke, and with a style of life that is not very attentive to the health. For example, the persons who drink one sack of coffee tend to exercise. They are less inclined to use food integrators, and they tend to have a less healthy diet. So in first studies on the coffee and the health, it was difficult to separate the effects of the coffee from the effects of the smoke or other choices of life.

During several decades that the coffee has been studied, have been some relations that the coffee can increase the risk of some tumours or the risk of cardiac sicknesses. But in studies better led, like what we have only published, he studies wider than they have one sack of information about all the factors of the style of life others and to do a real effort for the control of these factors of style of life we do not find a great deal of these effects on the health that the persons were afraid.

6. Which is the last research for the risks of coffee or of coffee during the pregnancy?

For the women in pregnancy, there has been a little ‘of polemic about the high fact I use coffee or of coffee it can increase the risk of spontaneous abortion. The jury is still outside. But we know that the coffee passes through the placenta and reaches the foetus, and that the foetus is very sensitive to the coffee, but the metabolizza very slowly. So for the women expectant mothers it seems prudent to reduce the coffee consumption to a low level, for example a cup in the day.

7. Does it should persons with high sanguineous pressure to consider of reducing their coffee or the coffee acceptance? What do the persons to to say with diabetes?

We know that if the persons are not accustomed to using any coffee, and they begin to use the coffee, their sanguineous pressure rises remarkably. Within a week of consumption of coffee, nevertheless, we see that the effect is less pronounced, there is less than one increase of the sanguineous pressure. After different weeks of continuous consumption of coffee, nevertheless, a little bit ‘of increase of the sanguineous pressure remains. In the studies that analyse the hypertension incidence in the general population, to drink coffee coffee is not associated with a substantial increase of the risk. But if the persons have the hypertension, and they are having a difficult moment to check their hypertension, they might try to sieve the coffee coffee to the coffee decaffeinato, to see if it has a beneficent effect.

With the diabetes, it is a little ‘a paradox. He studies in the whole world they demonstrate constantly that a high consumption of coffee or coffee decaffeinato 2 is associated by low risk of diabetes of type. But if the acute studies look at each other that only to give to the people the coffee of the coffee or containing coffee, and then they have them to eat something rich in glucose, their sensitiveness to the insulin and it reduces the glucose levels in the blood they are higher than the expected. Term is not any given a long time on the consumption of coffee and the control of the glucose. But if the persons have the diabetes and have difficulties to check the glycemia, it can be useful for them of trying to pass from coffee to the coffee decaffeinato. If it returned the passage with coffee for decaffeinato it might be better of stopping coffee completely, why some researches suggest that the coffee decaffeinato reduces really the answer to the glucose.

8. How is it done to explain the paradoxical results on the consumption of coffee and coffee and the diabetes?

And possible that are effects simply diverged by the acceptance to short term ea long term of coffee and coffee. And, since I have said beforehand, it is more and more obvious that the coffee is much more coffee, and the effects on the health that it is seen for a coffee with coffee it is often different from what would be waited on the grounds of his coffee content.

For example, if the physical performance looks at itself, it seems that the coffee can be useful somehow or other, but the coffee coffee is not it. Or, if the sanguineous pressure looks at itself and to compare the effects of the coffee coffee to the effects of the coffee, you will find that the coffee with coffee causes an increase of the sanguineous pressure what I am substantially weaker than here would be waited for the quantity of coffee that it contains. The same thing is valid for the report between coffee, the coffee and glucose to the blood after a meal. And ‘possible that are composed to us in the coffee that can hinder the effect of the coffee, but more research must be done.

9. Is it to drink the coffee done with a filter from paper healthier of drinking the boiled coffee or other types of coffee?

Coffee contains a substance called Cafestol that is a powerful stimulator of the levels of cholesterol LDL. Cafestol is in the fat fraction of the coffee, and when to prepare the coffee with a paper filter, the Cafestol is left in the filter. Other methods of preparation of the coffee, like the common boiled coffee in the Scandinavian countries, coffee prints French, or Turkish coffee, they are higher in Cafestol. Then, for the persons who have elevated cholesterol levels or who want to prevent what property levels raised of cholesterol, it is better to choose the coffee filtered paper or of instant coffee, since they have levels lower of Cafestol prints the boiled or French coffee. Espresso is somewhere in the means, but it has fewer Cafestol prints the boiled or French coffee, but more paper with filtered coffee.

10. To do tea and do coffees have similar beneficent effects?

Here it might wait for some of the beneficent effects of the coffee to be similar for the tea, since some of the compound ones are similar. A study led in China has discovered that to drink great quantities of tea Oolong, one litre in the day, is beneficent for the control glicemico in the persons suffering from diabetes. But the research for the tea in the United States has not shown the type of beneficent effect that we see for a coffee, probably because in the United States they tighten to drink the people the tea that is weaker in strength and tend to drink less.