The past, present, and future of Alzheimer's disease-part 3: the future.

Predicting future advances in science is practically impossible because unexpected discoveries can radically change the march of ongoing processes. Predicting the nearest future may have a slightly greater chance of success. First, the diagnosis of risk factors for Alzheimer's disease (AD), based on the preponderant role of genetics, will be made very early. Diagnosis will be made with biomarkers prior to clinical manifestations. Furthermore, the prevention of AD and of dementia due to AD will be possible with better control of the many risk factors for dementia, healthier lifestyles, multi-target drugs, and genetic therapy. The relationship between AD and aging will be better understood, opening possibilities for intervention in aging itself. As the pathophysiology of AD is not unique, treatment will be individualized, according to the stage and characteristics of the disease. Most clinical trials will have surrogate markers as primary outcomes. Treatments to decrease the velocity or arrest the evolution of mild cognitive impairment (MCI) and mild dementia caused by AD will be available. Additionally, artificial intelligence (AI) will aid in the diagnosis and selection of the best treatments. Access to the new methods for diagnosing and treating AD is currently limited to a small parcel of the population, especially in low- and middle-income countries, because of their high costs. Due to the high prevalence of AD, it is possible these will become less expensive in the future. The possibility of reversing dementia once it has set in will probably have to wait for longer.