Alzheimer's Disease
What is Alzheimer's Disease?
Alzheimer's disease is a brain disorder that slowly destroys memory and thinking skills. Over time, it takes away the ability to carry out even simple tasks. Most people with Alzheimer's are 65 and older, but younger people can also develop it.
The disease causes brain cells to die and connections between brain cells to break down. This happens because of abnormal protein deposits called plaques and tangles that build up in the brain. These deposits interfere with how brain cells communicate with each other.
Alzheimer's is the most common cause of dementia among older adults. Dementia is a general term for loss of memory and other mental abilities severe enough to interfere with daily life. While there is no cure yet, early detection and lifestyle changes may help slow progression and maintain quality of life.
Symptoms
Early symptoms of Alzheimer's disease can be subtle and often get mistaken for normal aging. Common signs include:
- Memory loss that disrupts daily life, especially forgetting recently learned information
- Difficulty planning or solving problems, like following a recipe
- Trouble completing familiar tasks at home or work
- Confusion with time or place, losing track of dates or seasons
- Problems with visual images and spatial relationships
- New problems with words in speaking or writing
- Misplacing things and losing the ability to retrace steps
- Decreased or poor judgment, especially with money
- Withdrawal from work or social activities
- Changes in mood and personality, including increased anxiety or depression
Many people in the very early stages show no obvious symptoms. The disease progresses slowly over years, with symptoms worsening gradually over time.
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Causes and risk factors
Alzheimer's disease develops from a complex series of brain changes over many years. Scientists believe it results from a combination of genetic, lifestyle, and environmental factors. Age is the greatest risk factor, with risk doubling every five years after age 65. Family history also plays a role, especially if you have a parent or sibling with the disease.
Certain genes increase risk, particularly the ApoE e4 variant, though having this gene does not guarantee you will develop Alzheimer's. Other risk factors include elevated homocysteine levels, chronic inflammation, poor cardiovascular health, head injuries, and lifestyle factors like lack of exercise, poor diet, smoking, and limited mental stimulation. Imbalances in copper metabolism and vitamin B1 deficiency may also contribute to disease development. Understanding your risk through biomarker testing can help you take preventive action early.
How it's diagnosed
Diagnosing Alzheimer's disease involves medical history, cognitive testing, and lab work to rule out other conditions. Blood tests can now identify important risk factors and early warning signs. Tests for ApoE genotype show genetic risk, while homocysteine levels indicate whether this risk factor is elevated. Vitamin B1 levels help identify deficiencies that may increase risk.
Other biomarkers like phosphorylated tau-217, ceruloplasmin, and inflammatory markers such as Interleukin-1 Beta and Lp-PLA2 activity provide insights into brain health and neuroinflammation. Aluminum and silicon levels may also be checked since metal accumulation can play a role. Rite Aid offers comprehensive biomarker testing to assess your risk factors. Brain imaging and neurological exams by specialists can confirm diagnosis and track disease progression.
Treatment options
While there is no cure for Alzheimer's disease, treatments focus on slowing progression and managing symptoms:
- Lifestyle changes including regular physical exercise, which improves blood flow to the brain
- A Mediterranean-style diet rich in vegetables, fish, whole grains, and healthy fats
- Mental stimulation through puzzles, reading, learning new skills, and social activities
- Quality sleep, aiming for 7 to 8 hours nightly to support brain health
- Stress reduction techniques like meditation or gentle yoga
- B vitamin supplementation, especially B1, B6, B9, and B12, to lower homocysteine levels
- Managing cardiovascular risk factors like high blood pressure, diabetes, and high cholesterol
- Medications that temporarily slow cognitive decline or manage behavioral symptoms
- Clinical trials investigating new treatments and prevention strategies
- Support services and care planning for patients and families
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- Simple blood draw at your nearest lab
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Frequently asked questions
Dementia is a general term for loss of memory and thinking skills that interfere with daily life. Alzheimer's disease is the most common type of dementia, accounting for 60 to 80 percent of cases. Other types of dementia include vascular dementia, Lewy body dementia, and frontotemporal dementia.
Yes, certain blood biomarkers can identify risk factors years before symptoms develop. Tests for ApoE genotype, homocysteine, phosphorylated tau-217, and inflammatory markers help assess your risk. Early detection allows you to make lifestyle changes that may delay or prevent disease onset.
The ApoE gene comes in three forms, and the e4 variant increases Alzheimer's risk. Having one copy of ApoE e4 raises risk two to three times, while two copies increase it eight to twelve times. However, not everyone with this gene develops Alzheimer's, and lifestyle factors still play an important role.
High homocysteine levels can damage blood vessels and brain cells, roughly doubling the risk of Alzheimer's disease. This amino acid accumulates when you have low levels of B vitamins. Supplementing with vitamin B1, B6, B9, and B12 can lower homocysteine and potentially reduce risk.
Chronic brain inflammation contributes to nerve cell damage in Alzheimer's disease. Biomarkers like Interleukin-1 Beta and Lp-PLA2 activity measure inflammatory processes linked to the condition. Reducing inflammation through diet, exercise, and stress management may help protect brain health.
Yes, research shows that lifestyle interventions can meaningfully impact disease progression. Regular exercise, a Mediterranean diet, mental stimulation, quality sleep, and stress reduction all support brain health. These changes work best when started early, ideally before significant cognitive decline occurs.
If you have a family history of Alzheimer's disease, consider testing in your 40s or 50s. Earlier testing allows more time for preventive lifestyle changes. Even without family history, baseline testing by age 60 helps establish your risk profile and guide prevention strategies.
Genetics play a role, but most cases are not directly inherited. Having a parent or sibling with Alzheimer's increases your risk two to three times. However, genes are not destiny, as lifestyle factors significantly influence whether the disease develops or progresses.
Phosphorylated tau-217 is a protein that becomes abnormal in Alzheimer's disease, forming tangles inside brain cells. Blood levels of p-tau217 can detect Alzheimer's changes decades before symptoms appear. This biomarker helps identify who might benefit most from early intervention and monitoring.
While aluminum accumulation in the brain has been observed in Alzheimer's patients, the link remains controversial. Some studies suggest limiting exposure from sources like certain antacids and antiperspirants. Testing aluminum levels can help determine if this is a concern for you specifically.