Rachel V Thomas

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Why Does Type 2 Diabetes Increase The Risk Of Alzheimer’s Disease? Neurologist Explains

A new review of studies has found that people living with <span>type 2 diabetes</span> have a significantly higher risk of developing Alzheimer's disease.

Researchers from Curtin University conducted a systematic review and meta-analysis of 40 studies. They estimated that if 1,000 people with type 2 diabetes were followed for a year, an average of 4.7 would develop Alzheimer's disease.

Published in Alzheimer's Research &amp; Therapy, a separate analysis found that type 2 diabetes was associated with a 53% higher adjusted relative risk of Alzheimer's disease compared with people without the condition.

<h2>How Does <span rel="noindex">Blood Sugar Affect Memory</span>?</h2>

Ahead of <span>World Diabetes Day</span>, Dr <span>Sudhir Kumar</span>, neurologist at Apollo Hospitals, Hyderabad, in a post on X, explained that several overlapping mechanisms may link type 2 diabetes to Alzheimer's disease. These include:

<ul><li><strong><span rel="noindex">Brain insulin resistance</span></strong>: Brain cells become less responsive to insulin, potentially impairing their ability to use glucose for energy and clear amyloid and tau proteins.</li><li><strong>Vascular damage</strong>: High blood sugar can damage large and small blood vessels in the brain, increasing the risk of strokes and vascular dementia.</li><li><strong>Chronic inflammation</strong>: Peripheral inflammation and lipid abnormalities can weaken the blood-brain barrier and trigger neuroinflammation.</li></ul>"Type 2 diabetes is recognized as one of the major modifiable risk factors for dementia. Even prediabetes and impaired glucose tolerance can impact long-term brain structure," Dr Kumar said.

<h2>How Does Diabetes Increase The Risk Of Dementia?</h2>

According to Alzheimer's Society UK, diabetes is an established risk factor for dementia. The risk also increases with the duration and severity of diabetes. However, having diabetes does not mean a person will necessarily develop dementia.

With diabetes and Alzheimer's disease cases rising globally, understanding the link between the two conditions is becoming increasingly important.

Insulin helps regulate blood sugar by enabling the body's cells to use glucose for energy. In people with diabetes, the body either does not produce enough insulin or cannot use it effectively, causing blood sugar levels to rise.

Studies have linked type 2 diabetes to an increased risk of dementia. In people with type 1 diabetes, severe and repeated episodes of high or low blood sugar have also been associated with a higher risk.

Diabetes and Alzheimer's disease may share certain underlying mechanisms. In both conditions, brain cells can become less responsive to insulin, potentially affecting brain function and contributing to the accumulation of amyloid and tau proteins associated with Alzheimer's disease.

<h2>How Can People With Diabetes Protect Their Brain Health?</h2>

Dr Kumar recommended the following measures for people living with type 2 diabetes:

<ul><li>Maintain blood sugar levels: Aim to keep glucose within your target range.</li><li>Avoid extreme fluctuations: Prevent prolonged high blood sugar (HbA1c of 7% or higher) and severe, repeated episodes of low blood sugar (hypoglycemia).</li><li>Manage other health conditions: Keep blood pressure and cholesterol under control.</li><li>Prioritise a healthy lifestyle: Eat whole foods, including vegetables, fruits and whole grains, and engage in regular physical activity to improve insulin sensitivity.</li></ul>

"Early detection, consistent blood sugar management, and working closely with your healthcare team can help safeguard your cognitive future," he said.

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A new review of studies has found that people living with type 2 diabetes have a significantly higher risk of developing Alzheimer's disease.Researchers from Curtin University conducted a systematic review and meta-analysis of 40 studies. They estimated that if 1,000 people with type 2 diabetes were followed for a year, an average of 4.7 would develop Alzheimer's disease.Published in Alzheimer's Research & Therapy, a separate analysis found that type 2 diabetes was associated with a 53% higher adjusted relative risk of Alzheimer's disease compared with people without the condition.How Does Blood Sugar Affect Memory?Ahead of World Diabetes Day, Dr Sudhir Kumar, neurologist at Apollo Hospitals, Hyderabad, in a post on X, explained that several overlapping mechanisms may link type 2 diabetes to Alzheimer's disease. These include:Brain insulin resistance: Brain cells become less responsive to insulin, potentially impairing their ability to use glucose for energy and clear amyloid and tau proteins.Vascular damage: High blood sugar can damage large and small blood vessels in the brain, increasing the risk of strokes and vascular dementia.Chronic inflammation: Peripheral inflammation and lipid abnormalities can weaken the blood-brain barrier and trigger neuroinflammation."Type 2 diabetes is recognized as one of the major modifiable risk factors for dementia. Even prediabetes and impaired glucose tolerance can impact long-term brain structure," Dr Kumar said.How Does Diabetes Increase The Risk Of Dementia?According to Alzheimer's Society UK, diabetes is an established risk factor for dementia. The risk also increases with the duration and severity of diabetes. However, having diabetes does not mean a person will necessarily develop dementia.With diabetes and Alzheimer's disease cases rising globally, understanding the link between the two conditions is becoming increasingly important.Insulin helps regulate blood sugar by enabling the body's cells to use glucose for energy. In people with diabetes, the body either does not produce enough insulin or cannot use it effectively, causing blood sugar levels to rise.Studies have linked type 2 diabetes to an increased risk of dementia. In people with type 1 diabetes, severe and repeated episodes of high or low blood sugar have also been associated with a higher risk.Diabetes and Alzheimer's disease may share certain underlying mechanisms. In both conditions, brain cells can become less responsive to insulin, potentially affecting brain function and contributing to the accumulation of amyloid and tau proteins associated with Alzheimer's disease. How Can People With Diabetes Protect Their Brain Health?Dr Kumar recommended the following measures for people living with type 2 diabetes:Maintain blood sugar levels: Aim to keep glucose within your target range.Avoid extreme fluctuations: Prevent prolonged high blood sugar (HbA1c of 7% or higher) and severe, repeated episodes of low blood sugar (hypoglycemia).Manage other health conditions: Keep blood pressure and cholesterol under control.Prioritise a healthy lifestyle: Eat whole foods, including vegetables, fruits and whole grains, and engage in regular physical activity to improve insulin sensitivity."Early detection, consistent blood sugar management, and working closely with your healthcare team can help safeguard your cognitive future," he said.

world diabetes day why does type 2 diabetes increase the risk of alzheimer’s disease? neurologist explains

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