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Will your caffeine metabolism affect whether coffee is good for you?
Despite the incredible amount of evidence that coffee is good for you, people continue to act as if it's not just a guilty pleasure, but one that's actively bad for you. The fact is that more and more evidence shows that coffee, whether regular or decaffeinated, instant, drip, espresso, or brewed in some other way, is good for you.
Coffee and your heart
In spite of the tons of research to the contrary, people persist in thinking that coffee is bad for them. I can only guess that people think that something they enjoy so much can't possibly be good for them.
Drink coffee, live longer
Coffee is one of, if not the most widely consumed beverages in the world, so it's no surprise that there's been lots of research into its effects on human health. It's brain food, may help prevent gout attacks and improve your blood sugar control (important for diabetics), reduces your risk of colon cancer, and reduces markers of inflammation, which are linked to your risk of cancer and heart disease.
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Today's research is a bit of a reversal: what happens if you are a habitual coffee drinker, and you stop drinking coffee?
The authors utilized data gathered for a long-term study of persons at least 60 years of age, known as the Seniors-Estudio de Nutricion y Salud Cardiovascular en Espana (ENRICA). Participants were recruited in multiple years starting in 2008, with those recruited in 2008 subject to follow-up in 2012, 2015, and 2017.
These participants responded not only to food frequency questionnaires detailing their customary intake of various types of coffee (both caffeinated and decaffeinated), but also reported on their diagnosed medical conditions as well as their personal experience of their health: for example, they reported physical limitations such as having difficulty walking multiple blocks or having levels of pain that prevented them from participating in normal work. Mental and emotional issues were also explored, including questionnaires that measured levels of depression.
The authors noted those participants who reported drinking caffeinated or decaffeinated coffee regularly at the start of the study, then also noted those who reported "no consumption" later on in the study. Did those participants experience a decline in their reported health status?
The results are interesting: of the 474 participants who reported drinking caffeinated coffee on a regular basis at the start of the study, 29% stated that they no longer drank coffee in 2015. These same participants also reported greater deterioration in their overall physical health. Similarly, those exhibiting a deterioration in their cognitive and mental health also were more likely to report that they had stopped drinking coffee.
Even those who reported drinking only decaffeinated coffee at the start of the study saw greater decreases in their overall and mental health when they stopped drinking any coffee at all, with greater reports of depression and limitations to walking ability.
The authors state that "health deterioration over 3 y was associated with an increasingly higher frequency of reports of no regular coffee consumption... during the subsequent 5 y."
The problem with this study is that given its design, it's impossible to know whether the participants stopped drinking coffee because they were experiencing health issues that made them think they should stop, or if they chose to stop drinking coffee and their health issues followed.
This is what is known as reverse causation, so this research simply points out the need for more research.
The amount of coffee that most adults drink on a daily basis is safe and certainly provides a huge percentage of the average person's daily intake of antioxidants. Unless your physician has told you to stop drinking coffee of any kind, there is no need to stop drinking coffee just because you are getting older. Again, speak with your physician if you are concerned about the effects of drinking regular or decaf coffee on your health.
First posted: June 3, 2020