Nov
18
2017

You May Want To Cut Down Coffee Consumption

By | addiction, coffee, heart attack, Mortality, Stroke

Many people drink too much coffee, so you may want to cut down coffee consumption. With all the good news about the health benefits when drinking coffee, some people went too far. They have overdone what was supposed to be good for them. Recently a study came out that tells you how to cut down coffee consumption.

But first I like to review the issue whether to drink caffeinated or decaf coffee. Next I will tell you how you can switch to decaf coffee.

Caffeinated and decaffeinated coffee have the same health benefits

  1. Recently a large study showed that coffee, caffeinated or not, has a connection with lower overall mortality.
  2. Coffee has long been a subject of heated discussions. Some praise it, and others condemn it. There are multiple past studies; some showed health benefits, some did not. This is why the Department of Nutrition, Harvard School of Public Health in Boston, MA. did a larger study. The purpose was to re-examine the health benefits for both caffeinated and decaffeinated coffee.

Mortality data regarding people who drank decaf coffee or regular coffee

Researchers assessed mortality among 74,890 women in the Nurses’ Health Study (NHS). Another 93,054 women in the NHS 2 study became part of this. And 40,557 men in the Health Professionals Follow-up Study were also part in this large study. The medium follow-up for all of these three groups was 22.5 years. 19,524 women and 12,432 men died during that time period. Ming Ding is a doctoral student at the Harvard School of Public Health department of nutrition. She was the lead author of this study. She pointed out that in the past there were confounding problems. Many studies had shown that both caffeinated and decaffeinated coffee consumption lowered the risk of cardiovascular disease. But the results in many studies were blurred. Studies often did not distinguish between smokers and non-smokers. This meant that the cardiovascular risk from smoking wiped out a beneficial effect from coffee drinking.

Confounding and other factors

Ding’s studies took this into account and also other confounding factors like how much sugary soda pop people were drinking and whether or not they were eating well. In addition they normalized for other factors that could interfere like drinking alcohol and eating red meat. Without normalizing for the factors mentioned above the study results were as follows. Study participants who had less than a cup of coffee and three cups a day had a 5% to 9% lower risk of dying than those who drank no coffee. Those who drank more than three cups a day did not see any benefit.

Dose response curve for regular and decaf coffee

After eliminating all the confounding factors researchers compared the various groups again, and the following linear dose-response curve emerged:

  • Less than 1 cup of coffee per day: 6% lower death rates than non-coffee drinkers.
  • 1 cup to 3 cups of coffee per day: 8% lower death rates.
  • 3 to 5 cups of coffee per day: 15% lower death rates.
  • More than 5 cups of coffee per day: 12% lower death rates.

Coffee consumption reduces diabetes and heart disease

Ming’s study connected with another research paper that had shown that coffee drinkers have a lower risk of developing type 2 diabetes and also less heart disease. She found that both, caffeinated and decaffeinated coffee, reduced the risk of getting diabetes later in life. When asked about what would be responsible for the reduced death rates with coffee consumption, she explained: “There are at least two known chemicals in coffee, namely lignans and chlorogenic acid that could reduce inflammation and help control blood sugar, both of which could help reduce the risk of heart disease”. You may want to cut down coffee consumption because you know decaf coffee does the same as regular coffee.

Other details about the caffeinated/decaf coffee study

Although there seems to be a linear response up to 5 cups of coffee consumption, above 5 cups this linear relationship disappeared. It was not explained whether there was a saturation point, whether there was yet another hidden confounding factor or whether there were detrimental effects on the adrenal glands with too much caffeinated coffee consumption.

Another finding was that it did not matter whether the coffee was regular (caffeinated) coffee or decaffeinated coffee. The results were identical.

Many other studies did not have the large numbers to show whether or not decaffeinated coffee was as effective in preventing heart disease as regular coffee.

Suicide rates and coffee consumption

There was another peculiar finding: suicides were down by 20% to 36%, if a person drank at least one cup of coffee per day. If a person consumed less than 1 cup of coffee per day the suicide rate was 36% higher than the control group with no coffee consumption. This is a rather peculiar finding, particularly for the consumption of less than 1 cup of coffee. Other studies also showed a decrease in suicide rates with coffee consumption.

Although previous studies had shown a reduction in liver and prostate cancer, after the removal of confounding factors this study did not show any effects on cancer causation or cancer death rates with coffee consumption.

Discussion

The Department of Nutrition, Harvard School of Public Health in Boston, MA has excelled in high quality nutritional studies for decades. This study is particularly important, because it is so large, giving it more statistical power. Secondly, the observation time of an average of 22.5 years is longer than most coffee studies in the past. Add to this the removal of the “noise” (called confounding factors) that interfered with the objective of the study, and you end up with a very meaningful result.

Clear results after confounding factors were removed

The important findings were that both caffeinated and decaffeinated coffee have the same effect of saving and extending lives. Perhaps you want to drink not more than 5 cups of coffee per day. That lowers your risk of premature death by 15%. It is most likely that it is the effect of lowering the rate of diabetes and heart attack rates that is responsible for the risk reduction. At least this was the opinion of the chief investigator. Cancer rates were not lowered by coffee consumption.

I sleep better when I drink decaffeinated coffee, so for me the notion that decaffeinated coffee and regular coffee have the same effect was important.

Revisit the statement: “you may want to cut down coffee consumption”

Now we know that there is no difference in benefits whether the coffee is caffeinated or not. Those of you who consume 3 to 5 cups of decaf coffee already enjoy a 15% reduction in risk of cardiovascular disease.

Those of you who take the same amount of regular coffee may get into a caffeine dependency problem. Because every time the caffeine stimulation wears off, you yearn for yet another cup of coffee. You need your fix, and this becomes a dependency problem. You have conditioned your body to that regular dose of caffeine, even though it is the bioflavonoids that are reducing mortality while caffeine is neutral.

My experience of coffee withdrawal

When I came across Ding’s research findings I was glad that now there was clarification about whether decaf coffee was as good as regular coffee. The next step for me was to cut out regular coffee and replace it by decaf coffee. Formerly I had been drinking 5 mugs of coffee daily (translated into 500 mg of caffeine daily). When I decided to quit this habit, I figured I should do it cold turkey from one day to the next. To my surprise this was a much bigger deal than I had thought.

Withdrawal symptoms

I craved the next cup of coffee, and I drank a decaf coffee. It did not help: Still, there was this craving for regular coffee! Yawning, restlessness and tiredness were symptoms that followed me all day long. Then there was irritability, a mild headache and almost flu-like symptoms. Eventually I went to sleep and woke up one hour later feeling a bit more energetic. But two hours later I had to lay down again. I was feeling that bushed. The following few days went better. There was more energy. But I still liked a noonday nap of about 1 hour.

Benefits of getting off regular coffee

This was not like me! Normally I have lots of energy and I don’t need naps. It took me 1-½ weeks to get over my 5-cup a day coffee withdrawal. But it was 100% worth it! Since then my energy is back to normal. I don’t have to chase coffee houses on a trip or ensure there is always a cup of regular coffee available for me at home (work does not apply, because I am retired). If I want I can replace my beloved coffee with another fluid. I love lemon juice sweetened with stevia instead of my decaf coffee. It is liberating that I no longer depend on the caffeine. But I still like the flavor of decaf coffee, and there is something enjoyable about the fragrance of freshly brewed coffee. And so I drink 3 to 4 cups of decaf coffee a day.

How to cut down coffee consumption

Here is a 2016 study from the Johns Hopkins University where 34 patients on 600 mg of caffeine per day received a 1-hour lecture about coffee withdrawal followed by a 6-week diary of their coffee consumption. They were asked to reduce their caffeine consumption down to 50 mg by week 6 of the coffee elimination program. Tests followed with salivary caffeine levels 6, 12 and 26 weeks after coffee cessation. There was also a 1-year follow-up telephone conversation. The results were that there was good compliance. Saliva caffeine levels verified this. The diaries over the first 6 weeks showed that the participants had gradually eliminated caffeine consumption. Perhaps this was a more humane way than my “cold-turkey” approach.

You May Want To Cut Down Coffee Consumption

You May Want To Cut Down Coffee Consumption

Conclusion

Many people are sensitive to too much caffeine consumption in coffee and other caffeinated beverages. But since the Harvard study that I mentioned above there is no need to overdose coffee or tea consumption. Decaf coffee has the same effect on lowering death rates by 15%, as does regular coffee. It pays to avoid caffeine, as you will avoid caffeine dependency. Drink decaf coffee instead!

I also discussed that withdrawal from regular coffee can be done more gently over a 6 week period. I did it from one day to the next and had a 1-½ week long withdrawal reaction. Do it slower or faster, whatever works best for you. The end result will be the same. Then enjoy it that you no longer depend on caffeine!

More info: https://www.askdrray.com/coffee-could-be-a-lifesaver/

Jul
01
2008

Have A Cup Of Coffee And Decrease Your Death Risk

By | Health, Heart Disease, Nutrition

Coffee can be good for you, and this is one of the items, which even tastes good! There are some exceptions as discussed in previous articles: more than 2 cups per day can increase the risk for miscarriages in pregnant women. People who are anxious or nervous can find that coffee will aggravate anxiety. Patients with rheumatoid arthritis should also not indulge in the flavorful brew.

Aside from these exceptions researchers have found that coffee consumption can be beneficial. A recent study using the data from 41,736 male and 86,214 female subjects has evaluated data over a follow- up time of 18 years in the male group and 24 years in the female group. The risk of all-cause mortality decreased significantly with increasing coffee consumption in the male as well as in the female group.

Men had a relative risk reduction of 20% as compared to their counterparts with the lowest level of coffee consumption. Women with intermediate to high consumption had a relative risk reduction of 10% to 30 % as compared to the group that drank less than 1 cup of coffee per day.

Have A Cup Of Coffee And Decrease Your Death Risk

Have A Cup Of Coffee And Decrease Your Death Risk

The limit of the study in this case was the self-reported nature of coffee consumption, but the researchers feel that the modest benefit of reduction of all-cause and CVD death warrants further investigation.

Reference: June 17, 2008 Annals of Internal Medicine

Last edited December 4, 2012

Jul
01
2006

Coffee Protects Against Liver Cirrhosis

By | Gastrointestinal Disease, Nutrition, Prevention

Coffee has been used as a stimulant for centuries, and more recent research has shown that moderate use of coffee can be beneficial.
The flavorful brew has been used as a wake-up drink, especially after a bad night’s sleep. Those suffering of a hangover after too much alcohol have also brewed it and felt better afterwards.
A new study in the June 12 Archives of Internal Medicine found that there was more benefit than just headache relief for those who drank too much booze. Heavy alcohol drinkers who also drank coffee reduced their risk for liver cirrhosis. (Liver cirrhosis is one of the severe side effects of too much alcohol use.)
Researchers examined the data of 125,580 subjects between the 1978 and 1985. Nearly 200 of these people developed alcoholic cirrhosis by 2001. The researchers found that for each coffee drink per day, there was a 22% drop in the risk of alcohol induced liver cirrhosis.

Coffee Protects Against Liver Cirrhosis

Coffee Protects Against Liver Cirrhosis

Generally tea is considered a beneficial beverage due to the bioflavonoids content. This large study also examined whether tea consumption would decrease liver cirrhosis risk, but no similar benefits were found for tea drinkers.

More information about liver cirrhosis: http://nethealthbook.com/digestive-system-and-gastrointestinal-disorders/liver-cirrhosis/

Reference: National Review of Medicine June 30, 2006

Last edited Nov. 1, 2014

Mar
01
2004

Less Diabetes With Coffee

By | Diabetes, Nutrition, Prevention

A Dutch Study has shown previously that coffee consumption was reducing the risk for developing diabetes. Now Dr. Salazar-Martinez and co-workers have confirmed this in a study involving even larger numbers of both men and women. This was published in the Annals of Internal Medicine and the research team is from the Harvard School of Public Health, Channing Laboratory, Harvard Medical School, and the Brigham and Women’s Hospital, Boston, Massachusetts. A total of 41,000 men and 84,000 women from the Nurses’ Health Study and the Health Professionals’ Followup Study were followed between 12 and 18 years. 1,333 men and 4,085 women developed diabetes during the time of observation. All of the data was analyzed carefully by controlling for other factors such as obesity, smoking, high blood pressure etc. to be certain that the only difference in the observed groups was the amount of coffee consumed.

According to the authors the gender differences are probably unimportant and may have to do with the different sample sizes. However, as the graph shows clearly, with the consumption of around 4-5 cups of coffee per day there is a significant 30 % drop in risk to develop diabetes.

The Dutch Study showed a 50% drop in risk with 7 cups or more per day and the study here suggests a similar drop with 6 cups or more.

Less Diabetes With Coffee

Less Diabetes With Coffee

Dr. Frank Hu, associate professor of nutrition and epidemiology at Harvard School of Public Health, who co-authored this study stated that physicians should still recommend to patients first to exercise and to loose weight to control diabetes. It would be premature to recommend heavy coffee consumption to patients for diabetes control.

Diabetes risk decreases with coffee consumption (%reduction)
 Less Diabetes With Coffee1

This beneficial effect was also observed to a lesser extent with decaffeinated coffee, but not with tea. According to Dr. Hu caffeine, chlorogenic acid and magnesium likely play a role in the protective effect with regard to diabetes prevention. Further studies will be done to see whether diabetes patients who drink coffee have a better outcome when they develop a heart attack.

Reference: Ann Intern Med – 6-JAN-2004; 140(1): 1-8

Last edited December 8, 2012

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Sep
01
2003

Stillbirth Associated With High Coffee Consumption In Pregnancy

By | Nutrition, Women’s Diseases

A study entitled “Maternal consumption of coffee during pregnancy and stillbirth and infant death in first year of life” by Dr. K. Wisborg et al. was published recently in the British Medical Journal (BMJ 2003; 326: 420-423).

The pregnancy outcome of 18,478 women who completed a questionnaire at their first prenatal visit was studied. They were asked about coffee consumption and the following 4 groups were identified: group 1 consisted of the 43% of women who drank no coffee. Group 2 (34%) drank 1-3 cups per day, group 3 drank 4-7 cups per day (18%). Group 4 drank 8 or more cups per day (5%).

Below are the results in tabular form.

The surprising result was that a small amount of coffee (1-3 cups per day) was actually reducing the risk of stillbirth by 30% when compared to women who drank no coffee at all. However, from 4 cups of coffee per day or more there was a sharp increase of stillbirths within the first year (=sum of stillbirths and deaths within the first year of life).

Stillbith Associated with High Coffee Consumption in Pregnancy

Stillbith Associated with High Coffee Consumption in Pregnancy

The authors suggest that physicians should advise their pregnant patients to limit coffee consumption in pregnancy to 1 or 2 cups of coffee or the equivalent of caffeinated drinks per day as a precautionary measure.

Stillbirth coffee study
Groups with varying amounts of coffee consumption: Risk increase of stillbirth compared to group 1 as control:
group 2  (1- 3 cups per day) -30%
group 3 (4 – 7 cups per day) 80%
group 4 (8 or more cups per day) 300%

Last edited December 9, 2012

Feb
01
2003

Coffee — What’s The Scoop…

By | Health, Nutrition, Prevention, Women’s Diseases

In a recent issue of The Medical Post, a weekly news magazine for Canadian Physicians (The Medical Post, Jan. 28, 2003), Dr. Suzan Biali has revisited what is medically known about the effects of coffee on health.

This doctor is a family physician in Vancouver/B.C., but also has a degree in dietetics. Here is a summary in table form of what this medical review found.

Dr. Biali also mentioned the recent publication in the November issue of the Lancet by the Dutch investigators that coffee consumption of more than 7 cups per day would cut diabetes in half.

Summary: It would appear that coffee consumption is better than previously thought of. Most people can benefit from it. But this is a personal preference issue. Some groups of patients should refrain from coffee consumption entirely such as patients with rheumatoid arthritis.

Coffee -- What's The Scoop...

Coffee — What’s The Scoop…

Others such as women in early pregnancy (particularly the first 3 to 4 months) should refrain from it. When infertility is a problem it is wiser to refrain completely from coffee as well. Patients with a tendency to ulcers likely should refrain or cut down the coffee consumption. The majority of the population likely could enjoy a cup of coffee and prevent degenerative neurological diseases (Alzheimers and Parkinsons disease). Some patients with psychiatric illnesses (phobias, anxiety disorders) likely should stay away from coffee as should patients with high blood pressure or heart rhythm irregularities.

Coffee — what’s the scoop?
Effects of coffee on: Comments:
first trimester pregnancy 5 or more cups a day can cause miscarriages
infertility women who drink 250 mg of caffeine per day (5 to 6 cups) experience infertility
no hip fractures a large Minnesota study showed in 2001 that there were NO hip fractures with coffee consumption
calcium in bones despite the rumors otherwise, there is NO link of coffee consumption to calcium loss
rheumatoid arthritis (RA) This is the patient group where osteoporosis has been found to be present with coffee consumption; a Finland study found a 2-fold risk with more than 4 cups per day, and a 15-fold risk with more than 11 cups per day (in RA patients only)
Alzheimers and Parkinsons the cells in the basal ganglia that produce dopamine get stimulated by coffee; this is also the seat of the addiction (though mild) to coffee and the cause for headaches when coffee is suddenly withdrawn. This effect  prevents Alzheimers and Parkinsons, both bad degenerative neurological disorders.
stomach problems anybody with a tendency for stomach ulcers or duodenal ulcers tends
to get worse with coffee. Arabian type coffee is less acidy than South American coffee. Coffee does not cause ulcers, but may stimulate existing acid production and in higher doses may stimulate H.pylori growth.
panic attacks and insomnia more sensitive people tend to feel anxious with a single cup of coffee per day, others can tolerate many cups. When a patient complains about panic attacks or insomnia the physician will likely inquire about how much coffee the person drinks.
high blood pressure long term coffee users show almost no effect on blood pressure, it does not cause high blood pressure. Those with high blood pressure
or a history of a stroke still should refrain from drinking coffee

Last edited December 10, 2012