Want to avoid Alzheimer’s? Try a darker roast.
Even decaf does the trick.
- Scientists pinpoint why coffee can ward off Alzheimer's.
- The key compounds appear to be phenylindanes.
- Darker roasts, even espresso, offer the greatest benefit.
Scientists have been saying for a while that drinking coffee may reduce the chances of acquiring Alzheimer's disease (AD), Parkinson's (PD), and dementia. A new study, published in Frontiers in Neuroscience in October, has taken a closer look into the now popular maxim, analyzing the correlation between Joe and lower incidences of AD.
"We wanted to investigate why that is, which compounds are involved, and how they may impact age-related cognitive decline," co-author Donald Weaver told Medical News Today. "
Their identification of phenylindanes compounds as the source of java's beneficial effect leads to a couple of surprises. First off, decaf is just as effective as caffeinated coffee at avoiding the disease. Secondly, what really matters is how dark the coffee's roast is.
The experiments started much like our days
Photo credit: Hiro Otake
For analysis, researchers' stock solutions began with Starbucks 100 percent Arabica instant coffee in light roast, dark roast, and decaffeinated dark roast varieties.
While the caffeine in coffee is known to produce a short-term increase in alertness, its long-term effect on the brain is less understood, especially since the amount of caffeine in any given cup is dependent on a host of variables. This said, controlled testing has been tricky. Additionally, there are a number of chemicals in java.
Weaver's team was focused on identifying naturally-occurring small molecules that can "inhibit the aggregation of amyloidogenic proteins." That is, proteins whose build up are believed to be a factor in Alzheimer's.
Ultimately, they found that the absence or presence of caffeine made no difference to the aggregation of the toxic proteins. Also ruled out as being of much use were chlorogenic acids — compounds that account for as much as 15 percent of unroasted beans — as well as quinic acid, caffeic acid, and quercetin.
It’s really about the phenylindanes
Coffee being roasted
When coffee beans are roasted, compounds called phenylindanes are generated. The darker the roast, the more phenylindanes are produced. According to the paper, it is these compounds that inhibit the aggregation of the Alzheimer's inducing tau and amyloid-beta proteins. Weaver admits, "So phenylindanes are a dual inhibitor. Very interesting, we were not expecting that."
What all this means is that if developing a neurodegenerative disease, especially Alzheimer's, is a concern, try switching to as dark a roast of coffee, or even espresso, as you find palatable. Caffeinated or not makes no difference in this regard, though the other effects of caffeine are, of course, a whole other issue.
Also, note that there's no indication that drinking coffee does anything to cure Alzheimer's. It simply seems to help avoid acquiring it.
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You can say 'no' to things, and you should. Do it like this.
- Give yourself permission to say "no" to things. Saying yes to everything is a fast way to burn out.
- Learn to say no in a way that keeps the door of opportunity open: No should never be a one-word answer. Say "No, but I could do this instead," or, "No, but let me connect you to someone who can help."
- If you really want to say yes but can't manage another commitment, try qualifiers like "yes, if," or "yes, after."
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- The team managed to stimulate nucleus-like structures to perform some biological processes, but not cell division.
- Unless better technology and DNA samples emerge in the future, it's unlikely that scientists will be able to clone a woolly mammoth.
- Still, studying the DNA of woolly mammoths provides valuable insights into the genetic adaptations that allowed them to survive in unique environments.
Neuroscience research suggests it might be time to rethink our ideas about when exactly a child becomes an adult.
- Research suggests that most human brains take about 25 years to develop, though these rates can vary among men and women, and among individuals.
- Although the human brain matures in size during adolescence, important developments within the prefrontal cortex and other regions still take pace well into one's 20s.
- The findings raise complex ethical questions about the way our criminal justice systems punishes criminals in their late teens and early 20s.
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