Home Mind & Brain 40% of Dementia Cases Are Preventable: Simple Steps to Protect Your Cognitive Health

40% of Dementia Cases Are Preventable: Simple Steps to Protect Your Cognitive Health

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A 2020 study has revealed that up to 40% of dementia cases can be prevented, a statistic that has caught the attention of people worldwide. The report, published in the prestigious medical journal The Lancet, emphasizes the importance of taking care of our cognitive health to reduce the risk of developing dementia. In this blog post, we will explore the key risk factors for dementia and provide simple, actionable steps you can take to protect your cognitive health.

Understanding dementia

Dementia is a progressive neurological disorder that affects memory, thinking, and reasoning abilities. Alzheimer’s disease is the most common form of dementia, accounting for 60%–80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. In most cases, dementia is caused by a combination of genetic, environmental, and lifestyle factors. It is crucial to identify modifiable risk factors that can help prevent or delay the onset of dementia.

Modifiable risk factors for dementia

  • Physical inactivity. Lack of regular physical activity increases the risk of developing dementia. Exercise helps improve blood circulation, reduces inflammation, and supports brain health.
  • Poor diet. An unhealthy diet rich in saturated fats and refined sugars can contribute to the development of dementia. A balanced diet rich in fruits, vegetables, whole grains, and lean proteins is crucial for maintaining cognitive health.
  • Smoking. Smoking can cause damage to blood vessels, leading to reduced blood flow to the brain and an increased risk of dementia.
  • Excessive alcohol consumption. Heavy alcohol consumption can lead to cognitive decline and increased dementia risk. It is recommended to limit alcohol intake to moderate levels.
  • Lack of mental stimulation. Engaging in mentally stimulating activities can help maintain cognitive function and reduce the risk of dementia.
  • Sleep disorders. Poor sleep quality or untreated sleep disorders, such as sleep apnea, can contribute to cognitive decline and dementia risk.
  • Social isolation. Loneliness and social isolation can negatively impact mental health and increase the risk of developing dementia.

Simple steps to prevent dementia

  • Stay physically active. Engage in at least 150 minutes of moderate-intensity aerobic exercise or 75 minutes of vigorous-intensity aerobic exercise per week. This can include activities like walking, swimming, or cycling.
  • Eat a healthy diet. Adopt a Mediterranean-style diet rich in fruits, vegetables, whole grains, legumes, fish, and healthy fats such as olive oil. This diet has been shown to protect against cognitive decline and dementia.
  • Quit smoking. If you smoke, quitting is one of the best steps you can take to reduce your risk of dementia. Consult your doctor or a smoking cessation programme for support.
  • Limit alcohol consumption. Stick to moderate alcohol consumption is defined as up to one drink per day for women and two drinks per day for men.
  • Keep your mind sharp. Engage in mentally stimulating activities such as reading, learning a new skill, or playing strategic games. These activities can help maintain cognitive function and reduce dementia risk.
  • Prioritise sleep. Ensure you get at least 7–9 hours of quality sleep each night. Address any sleep disorders with the help of a healthcare professional.
  • Stay socially connected. Maintain strong social connections by participating in community events, joining clubs, or volunteering. Social interaction can help prevent cognitive decline and reduce the risk of dementia.

Final thoughts

Dementia is a complex and debilitating neurological disorder. However, with the knowledge that up to 40% of dementia cases can be prevented, it is essential to take action to protect your cognitive health. By making simple lifestyle changes, such as staying physically active, eating a healthy diet, quitting smoking, limiting alcohol consumption, engaging in mental stimulation, prioritizing sleep, and staying socially connected, you can significantly reduce your risk of developing dementia.

Taking these preventative measures can not only improve your cognitive health but also enhance your overall well-being and quality of life. Remember, it’s never too early or too late to start taking care of your brain health. By adopting a proactive approach, you can make a positive impact on your cognitive future.


Adam Mulligan, a psychology graduate from the University of Hertfordshire, has a keen interest in the fields of mental health, wellness, and lifestyle.

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