Cognitive decline affects a person's ability to focus, remember, and make decisions.

Its severity can range from mild to severe, and it may lead to dementia, in the most severe cases.

People with dementia may find it diffcult to perform everyday tasks and live independently.

According to the World Health Organization (WHO), "around 50 million people have dementia."

In the United States, the Centers for Disease Control and Prevention (CDC) estimate that more than 5 million people aged 65 or older have Alzheimer's disease.

It is important to note that about 85% of older adults only experience a range of age-related cognitive impairments (ARCIs) and will never develop Alzheimer's disease. Nevertheless, mild cognitive decline may decrease quality of life and has socioeconomic consequences.

Age is a major factor in cognitive impairment, but family history, education level, physical inactivity, and chronic conditions such as heart disease and diabetes may contribute to cognitive decline.

As these factors affect people differently, there is no one-size-fits-all approach when it comes to the aging brain.

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