Showing posts with label harvard medical school. Show all posts
Showing posts with label harvard medical school. Show all posts

Wednesday, January 7, 2009

Diabetes and the Preventive Power of Coffee!

Theories abound as to why this is the case; however, scientists are now looking at new ways to improve the overall health of those both at risk for and suffering from this disease. Type 2 diabetes mellitus is one of the most rapidly accelerating diseases today in terms of number of people afflicted.

Many of these scientists have found that drinking coffees can significantly reduce the risk and effects of the disease.

In a recent study done at the Channing Laboratory of the Harvard School of Public Health, at the Harvard Medical School and Brigham and Women's Hospital, in Boston, Massachusetts, researchers explored the link between long-term coffees consumption and Type 2 diabetes mellitus.

The researchers found that long-term coffees consumption actually reduced insulin resistance, which is the key factor in Type 2 diabetes mellitus. The study followed over 120,000 men and women for eighteen years.

They were able to conclude that long-term coffees consumption significantly reduces the risk for Type 2 diabetes mellitus in both men and women and therefore benefits the health of the coffees drinker.

The results of this study were affirmed in another student by the Department of Molecular Medicine, of the Karolinska Institutet in Stockholm, Sweden. Although this study was of a lower scale (7949 subjects), it found similar results.

If the patient came into the study already suffering from Type 2 diabetes mellitus or impaired glucose tolerance (also known as insulin resistance or pre-diabetes), drinking at least 5 cups of coffees a day reduced their insulin resistance.

This was particularly true for women, who statistically suffer from a larger risk of insulin resistance than men. The health of those who drank coffees also benefited from enhanced insulin response.

The Department of Epidemiology and Health Promotion of the National Public Health Institute; at the University of Helsinki in Helsinki, Finland, also did a study of over 14,000 middle-aged patients to see if there is a relationship between coffees consumption and Type 2 diabetes mellitus.

This study was particularly interesting because the Finnish people have the highest coffees consumption in the world. This study again found that the incidence of Type 2 diabetes mellitus decreased as the coffees consumption increased.

In doing this study, the researchers found that this relationship existed even when the results were statistically adjusted to account for other risk factors, such as age, smoking, weight, alcohol consumption, and filtered/non-filtered coffees.

As mentioned previously, women have a higher incidence of insulin resistance and Type 2 diabetes mellitus than men. That may be why the Department of Medicine at the Sahlgrenska University Hospital/Ostra in Goteborg, Sweden, concentrated their study on women exclusively.

When they studied 1361 women with no previous incidence of heart disease or diabetes over a period of twenty years, they found that the risk of developing Type 2 diabetes mellitus for women who consumed five or more cups of coffees daily was almost half of that of women who drank three to four cups each day.

The study also found that it's possible that the coffees had an affect on the women's cholesterol levels, further benefiting their overall health.

Finally, the Centre for Nutrition and Food Safety at the School of Biomedical and Molecular Sciences at the University of Surrey in Guildford, United Kingdom, again confirmed the benefit of drinking coffees with regards to reducing the risk of Type 2 diabetes mellitus.

This study focused on the coffees effects on the gastrointestinal hormones that help regulate insulin secretion. The study found that caffeinated coffees actually lowered the absorption rate of the glucose, thereby reducing the effects of the Type 2 diabetes mellitus.

Overall, these studies suggest that drinking caffeinated coffees can be beneficial to those looking to reduce their risk of developing or worsening Type 2 diabetes mellitus.

© Copyright Randy Wilson, All Rights Reserved.

Monday, January 5, 2009

Coffee and Depression: Coffee as an Antidepressant?

You're just trying to get that morning pick me up to get your day going. When you grab that morning cup of java, you're probably not thinking of it as an antidepressant.

It acts on the central nervous system and has mild antidepressant effects. However, recent studies have shown that java really does function as an antidepressant, raising the spirits of people who regularly drink the stuff.

Coffee and depression studies have found that drinking coffee reduced the rate of suicide in the large demographic populations observed.

In this study, a Kaiser Permanente Medical Care Program study of 128,934 nurses found that java drinkers were significantly less likely to commit suicide than nondrinkers. The first coffee and depression study that raised the topic of java as an antidepressant was done in 1993.

The study stated that it could be that the coffee itself had little to do with it, but that people who drink coffee share other characteristics that make them less likely to commit suicide. This Nurse's Health Study on coffee and depression did not go so far as to establish a causal relationship between java drinking and the drop in the suicide rate.

A second study on coffee and depression, however, confirmed these controversial findings and went farther as to state that it was the coffee that dropped the suicide rate. This study was especially noteworthy, as it was large-scale and adjusted for a wide range of other factors.

Published in the Archives of Internal Medicine in 1996, the study followed more than 86,000 registered nurses in the United States between 34 and 59 years of age for ten years. Dr. Ichiro Kawachi, an epidemiologist at Harvard Medical School who led this study, looked at the data from the Kaiser Permanente study hoping to discount their findings.

Instead of what he expected to find, he confirmed the original study's results with his own: using coffee as an antidepressant reduced the suicide rate in these nurses.

Dr. Kawachi discovered that the nurses he studied who drank two to three cups of coffee a day were one-third less likely to commit suicide as those who didn't drink any.

The nurses who drank more than four cups a day were 58% less likely to commit suicide than their colleagues who drank less. The coffee and depression study of female nurses found eleven suicides among those who drank two to three cups of caffeinated coffee per day, compared with twenty-one cases of suicide among those who said they almost never drank coffee.

However, Dr. Kawachi and others aren't ready yet to use coffee as an antidepressant for clinical depression. At the minimum, Dr. Kawachi says that his study shows that drinking lots of coffee can't be bad for your health.

Psychiatrists point out that people must understand that depression isn't simply a state of mind; it is a very serious medical issue that cannot be resolved simply by drinking coffee.

And cardiologists, while they recommend to their patients with heart and other health problems to steer clear of caffeine, know that it's not good for a patient's mental health to do so immediately in a cold turkey manner. Instead, they recommend bringing down the coffee consumption gradually in order to avoid a severe state of depression due to the drop in caffeine and other antidepressants in coffee.

Whether it is the caffeine or something else, coffee does seem to have at least a mild antidepressant effect. The caffeine in coffee may have mood-elevating actions through effects on neurotransmitters such as dopamine and acetylcholine.

It is also possible that coffee drinking has social effects, such as increasing personal contacts and time spent socializing, that might reduce thoughts of suicide.

© Copyright Randy Wilson, All Rights Reserved.

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