Discover what smoking does to your brain, how it increases your risk of dementia and how many years you can add to your life by quitting smoking.
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“For me, sitting in the car with no smokes felt like I was starring in a slow-motion film. All I could think about was needing a cigarette.”
After this article, you’ll know why author Deb Palmer gave up smoking and the number of years you can add to your life by doing the same.
Deb Palmer and her husband would often spend hours on the road, riding up and down hunting for valuables to sell at their antiques store.
To pass the time, she’d chain-smoke cigarettes, regardless of whether she was behind the wheel or not.
And then, in 1992, her left lung collapsed. After her hospitalisation, she knew she’d have to give up smoking. The problem was that the road trips for her business still had to continue, which were a huge trigger for her smoking.
How did she deal with the constant cravings?
Deb and her partner started reading thrilling books to each other during their drives, which kept their minds occupied and provided a fresh activity to do instead of smoking.
30 years later, she has remained smoke-free, despite starting smoking at age 13. She no longer needs reading as a distraction from smoking, she still loves the pastime.
According to the research, let’s see how many years Deb may have added to her life.
Here’s the good news.
Studies have shown that by quitting smoking, it is possible to reduce your risk to that of somebody who has never touched a cigarette in their life.
Oxford researchers followed nearly 35,000 doctors across 50 years and discovered that if you quit smoking before the age of 60, you might buy yourself an extra three years of life.
Research suggests that it takes just under a year (0.9 years) without smoking to recover from every year you spend smoking.
You can work this out for yourself with the following easy equation:
years of smoking * 0.9 = recovery time in years
Let’s zoom into the brain of a smoker.
MRI scans of smokers versus non-smokers have shown that the more you smoke, the faster your brain loses volume in vital areas as you age.
Although it is normal for your brain to shrink as you age, the brains of smokers seem to shrink at double the rate of a non-smoker.
We see the effects of brain volume loss play out in everyday life.
Scientists examined over 3,000 adults and found that smokers scored lower on cognitive function tests that evaluated their processing speed, attention and working memory.
This is more serious than simply forgetting what you had for lunch yesterday. For smokers, it can mean struggling to keep up with the speed of information around them. Holding attention to one thing becomes a challenge, and working memory - the ability to keep information at the forefront of the mind - suffers.
The research on smoking and its link to dementia is overwhelmingly convincing.
One of the leading reasons for this strong connection is that both Alzheimer’s disease and vascular dementia are strongly tied to problems with your blood vessels, which undergo massive amounts of damage from the chemicals within cigarettes.
Researchers combined the results from multiple studies and created the World Alzheimer’s Report. They found that smoking leads to a 30 - 50% greater risk of developing dementia.
It is estimated that 14% of all Alzheimer’s Disease cases in the world are due to smoking.
Researchers combined the results of 37 studies and found that the risk of developing dementia increases by 34% for every 20 cigarettes smoked per day.
Because if giving up smoking sounds like an unrealistic and impossible task to you, just cutting down the number of cigarettes you smoke a day can lower your risk.
Even being in the same room as people who smoke might contribute to your risk of dementia.
Breathing in second-hand smoke is considered passive smoking, and while the associations are not as strong, a review of three studies found that it could be considered a significant risk factor for cognitive impairment in older adults.
According to the CDC, smoking increases your risk of a stroke by two to fourfold.
We’re here to be your friendly guide on the next decisions you make today, tomorrow and into the future.
Yes, smoking isn’t great for your brain health, but here’s what we want you to remember:
It is never too late to cut down or quit.
As we’ve now seen, cutting back today can greatly reduce your risk of developing dementia, and stopping completely could add many more healthy years to your life.
If you’re ready to kick the habit entirely, we highly recommend visiting your GP and taking advantage of the excellent online resources offered by the NHS.
Download our medically validated app today to assess your brain health, gauge your lifestyle factors, and get guidance from our digital coach on how to improve the five areas vital to reducing your risk for dementia.
Informations médicales
Tobacco smoking has been extensively documented as a risk factor for cognitive impairment and dementia. Stopping is one of the best things you can do for your brain.
A systematic review (where experts combine results from all eligible studies) by top medical journal the Lancet found smoking to considerably increase risk for dementia. Smoking causes a constellation of problems that can trigger dementia down the line. Two of the most common forms of dementia - Alzheimer's Disease and vascular dementia - have been linked to problems with your heart and blood vessels, which smoking can instigate. Cigarettes are also packed with toxins and chemicals that cause chronic inflammation (where your immune system goes haywire). It's never too late to stop: research has found that stopping smoking, even when older, reduces this risk.
1. Di Marco LY, Marzo A, Muñoz-Ruiz M, Ikram MA, Kivipelto M, Ruefenacht D et al. (2014). Modifiable lifestyle factors in dementia: a systematic review of longitudinal observational cohort studies. Journal of Alzheimer's Disease. 42(1):119–135. doi:10.3233/jad-132225.
2. Lafortune L, Martin S, Kelly S, Kuhn I, Remes O, Cowan A, Brayne C (2016). Behavioural risk factors in mid-life associated with successful ageing, disability, dementia and frailty in later life: a rapid systematic review. PLoS One. 11(2):e0144405.
3. North T-L, Palmer TM, Lewis SJ, Cooper R, Power C, Pattie A et al. (2015). Effect of smoking on physical and cognitive capability in later life: a multicohort study using observational and genetic approaches. BMJ Open. 5(12):e008393.
4. Choi, D., Choi, S., & Park, S. M. (2018). Effect of smoking cessation on the risk of dementia: a longitudinal study. Annals of clinical and translational neurology, 5(10), 1192-1199.
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