There are a number of different types of dementia, and the most common in the UK is Alzheimer's disease.
Diagnosing the condition early could help to slow down the conditions progress.
Making some small lifestyle changes could lower your chances of developing Alzheimer's in later life.
One of the easiest ways to protect against dementia is to steam your vegetables instead of frying them.
READ MORE: Dementia symptoms - watch out for this sign when cooking
"When molecules collide within the bloodstream, sometimes sugars such as glucose, or fructose, stick themselves onto protein or fat particles," she told Express Health.
"AEGs are produced by cooking for long periods and at high temperatures such as roasting, frying or barbecuing.
"When blood sugars are high, for example in prediabetes and diabetes, increasing numbers of AEGs are formed. AEGs are found in large quantities in the brains of people with Alzheimer's disease.
"Boil, poach, steam, bake, or grill when cooking. Steaming reduces AEGs by 75 percent."
Theres no certain way to prevent dementia from developing, but there are ways to lower your risk, said the NHS.
Eating a healthy, balanced diet should help to lower your chances of developing dementia.
Its also important to do enough exercise. Everyone should aim to do at least 150 minutes of moderate-intensity activity every week.
There are around 850,000 people in the UK with dementia, and the condition affects one in every six people over 80 years old.
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Dementia - the simple vegetable cooking hack to lower your risk of developing Alzheimer's - Express
