One of the most difficult things a person can go through is dementia. Watching your parents and loved ones grow older and slowly forgetting their usual routines, their memories as well as other important aspects of their lives. Dementia is not just memory loss, it changes a person’s behavior, the way they think as well as personality traits that they have possessed for years. There are different types of dementia, one of which is Alzheimer’s. According to the World Health Organization, 57 million people worldwide have dementia in 2021 and 10 million new cases each year. Alzheimer’s disease is the most common form of dementia, with 70% of cases being of it. While there is no cure for this, the best way to deal with this disease is by getting it diagnosed early. However, diagnosing Alzheimer's disease isn't a single test but usually involves a combination of checks like thinking assessments, brain scans, and lab tests. Many adults, especially those over 45, would want to know if they're at high risk for the disease. How Doctors Diagnose Alzheimer's Thinking and Memory Tests If you're noticing changes in your thinking, the first step is usually to talk to your doctor. It's really helpful to describe any worries openly and give specific examples. Your doctor can then do some initial checks on your thinking abilities. They might also send you to a specialist for more detailed tests that look at your memory, language, spatial skills, and more. Brain Scans (Imaging Tests) Some special types of PET scans can look for signs of Alzheimer's in your brain, though these aren't always widely available. Amyloid PET scans search for sticky clumps called amyloid plaques, which are a hallmark of Alzheimer's. FDG PET scans can show changes in how active your brain cells are, like nerve cell damage. Tau PET scans look for a buildup of a protein called tau, another key feature of Alzheimer's. Other scans, like CT or MRI, can help rule out other conditions that might cause similar symptoms, but aren't specifically for diagnosing Alzheimer's itself. Lab Tests Your doctor might perform a test on your cerebrospinal fluid (CSF), the fluid surrounding your brain and spinal cord. This can help rule out other types of dementia. There's a big demand for simpler tests, like blood tests, and scientists have developed accurate ones that measure Alzheimer's-related proteins. However, these blood tests are mostly used in research or specialized clinics and aren't fully approved or generally recommended for people just curious about their brain health yet. Is It Normal Aging or Alzheimer's? It's common to have some minor memory changes as you get older, like forgetting why you walked into a room. With normal aging, that forgotten information usually comes back to you eventually. Alzheimer's disease typically starts in your mid-60s, but signs can appear earlier. The key difference is that someone with Alzheimer's might be too far along to notice their own symptoms; often, it's their loved ones who first spot the warning signs. If you're just experiencing normal aging, you can usually recall forgotten information if you think hard enough. Future of Alzheimer's Testing Researchers are studying whether treating the disease before symptoms appear can prevent or delay Alzheimer's. In the future, there might be therapies for people diagnosed before they have noticeable problems. For now, major groups and experts don't recommend intensive testing for people without symptoms. A simple memory check during your yearly physical is likely harmless. There might be a future where proactive blood tests for Alzheimer's are routine, similar to other health screenings, but we're not quite there yet. Should You Get Screened Early? Alzheimer's is a disease that develops slowly, sometimes even 20-25 years before the first symptoms show up. Because of this, it's possible to test for biological signs of the disease before memory issues begin. Early screening might encourage you to make lifestyle changes that could potentially prevent or delay dementia, such as: Quitting smoking.Eating a balanced diet.Exercising regularly.Staying mentally and socially activeIt's worth noting that these are healthy habits everyone can benefit from, regardless of screening. While some drugs can slow the disease in early or mild stages, they currently can't be given to people who don't yet show symptoms. Getting a diagnosis can also be upsetting, and doctors might be hesitant to give bad news without a clear treatment path.