Detecting Alzheimer’s Early: Symptoms Causes, & Prevention To Know


Alzheimer’s disease is a progressive neurological disorder that results in loss of memory, thinking skills, and ability to carry out simple tasks. As of 2022, Alzheimer’s disease affects more than 6 million Americans. It is the most common cause of dementia in older adults. With a growing aging population, the number of Alzheimer’s cases continues to increase worldwide.

Though it is more common in people over age 65, onset can begin in the 40s or 50s. Recognizing the early symptoms is crucial, as early detection provides the best chance to slow progression. This article examines the early signs of Alzheimer’s, its causes, and tips for prevention.

Understanding Alzheimer’s Disease

Alzheimer’s disease initially targets parts of the brain critical for memory, including the hippocampus and cerebral cortex. As more neurons become damaged and die, additional regions of the brain are affected. This leads to a loss of cognitive skills, behavior changes, and an inability to function independently.

Alzheimer's Early Symptoms Causes, & Prevention

Though some medications and therapies can temporarily improve or stabilize symptoms, there is currently no cure for the ongoing brain degeneration of Alzheimer’s disease. Scientists believe a combination of genetic, lifestyle, and environmental factors determine each person’s risk. With a better understanding of early signs and causes, steps can be taken to lower the chances of developing Alzheimer’s or slow its progression.  

Early Symptoms Of Alzheimer’s Disease

The first signs of Alzheimer’s can be very subtle, often mistakenly dismissed as normal parts of aging. However, key symptoms involve changes severe enough to affect daily activities and relationships. 

Memory problems are typically one of the earliest signs. This includes difficulty recalling recent events, conversations, or names. A related symptom is asking repetitive questions or retelling the same stories multiple times, without realizing it. As short-term memory worsens, the person may struggle to follow story plots, keep track of monthly bills, or remember daily routines. 

Other thinking and concentration issues can include getting lost or disoriented in familiar places, difficulty solving simple math problems, and trouble following recipes or directions. The individual might leave mail sitting unopened, forget to take medications properly or miss monthly financial obligations. Decision-making abilities and judgment also deteriorate. 

Personality and behavior changes can develop as well. The person may seem more passive, withdrawn, depressed, anxious, or suspicious. Irritability and agitation are also common. He or she may lose interest in favorite hobbies, become apathetic, or have reduced initiative. 

As Alzheimer’s progresses into later stages, the individual requires more help with daily self-care and safety. However, paying attention to milder initial symptoms can allow earlier diagnosis and treatment. Catching warning signs within the first few years can help identify reversible causes and give the best chance to slow the worsening of symptoms.

Causes Of Alzheimer’s Disease

Experts believe Alzheimer’s develops from a complex mix of genetic, lifestyle, and environmental factors that affect brain health and function. The leading risk factor is advancing age, with most cases occurring after age 60. Family history also plays an important role, as those with a parent or sibling with Alzheimer’s are more likely to develop the disease. 

Alzheimer’s Disease

One key biological factor is the build-up of abnormal protein clumps in the brain called beta-amyloid plaques. Plaques disrupt communication between neurons, triggering inflammation and eventual cell death. The presence of a specific gene, apolipoprotein E (APOE) e4, is linked to higher beta-amyloid levels. 

Research shows other factors that raise Alzheimer’s risk include high blood pressure, heart disease, high cholesterol, obesity, and diabetes. A lifelong habit of limited physical and social activity seems to increase susceptibility. Traumatic brain injury, depression, low education levels, smoking, and excessive alcohol consumption can also play a role. 

A better understanding of contributing causes allows people to take proactive steps earlier in life to help lower Alzheimer’s risk. While some risk factors are unavoidable, focusing on a brain-healthy lifestyle offers hope for avoidance and prevention.

How To Prevent Alzheimer’s Disease?

Though no guarantees, leading Alzheimer’s experts recommend emphasizing the following habits and choices at any age:

  • Regular physical exercise: Aim for at least 30 minutes of cardio activity most days of the week. This enhances blood flow while decreasing inflammation and encouraging new brain cell connections.
  • Stay mentally stimulated: Continued learning strengthens cognitive reserve and may offset the onset of dementia symptoms. Read books, take classes, learn new skills, play games, and do puzzles.  
  • Eat a brain-healthy diet: Focus on fruits, vegetables, whole grains, fish, poultry, beans, nuts, and healthy oils. Keep sugar, salt, and saturated fats low. A Mediterranean-style diet shows particular benefits.
  • Stay socially engaged: Make time for regular social interaction and meaningful hobbies to reduce the risk of depression, stress, and isolation.
  • Treat cardiovascular risk factors: Keep blood pressure, cholesterol, and sugar within recommended ranges to support brain health.
  • Limit alcohol: Drink no more than one serving per day to avoid excess which can shrink the brain.  
  • Don’t smoke: Smoking heightens the risk of dementia and cognitive decline. If needed, get help to quit.
  • Manage stress: Chronic stress and cortisol release negatively impact memory centers, among other harmful effects. Practice relaxation techniques.
  • Get enough sleep: Lack of sleep increases Alzheimer’s risk. Most adults need 7-9 hours per night. Address any sleep apnea issues.
  • Protect your head: Use seat belts, avoid falls, and minimize repetitive brain injuries to lower the chances of future dementia.

While aging brings an increased risk of Alzheimer’s, focusing on controllable lifestyle factors provides the best hope for the prevention or delay of symptoms. Though difficult, healthy changes at any point in life offer benefits. Even small daily improvements can positively impact your long-term brain health.


In summary, Alzheimer’s disease causes growing disability and loss of independence as it damages areas of the brain needed for memory, thinking, and reasoning. Recognizing subtle early symptoms allows the best chance for early diagnosis and intervention efforts.

While age and genetics play a role, lifestyle choices including diet, exercise, mental stimulation, and managing risk factors are key to Alzheimer’s prevention. Though research continues for treatment options, the best defense still lies in overall brain health promotion throughout life. Paying attention to modifiable risk factors, even later in life, can help delay or avoid the onset of Alzheimer’s disease.


Q: What are the 10 early signs of Alzheimer’s?

A: The 10 earliest signs of Alzheimer’s disease are: memory loss affecting daily function, challenges completing familiar tasks, confusion about time or place, trouble understanding visual information, problems with spoken or written words, misplacing items, and being unable to retrace steps, poor judgment and decision making, withdrawal from social activities, changes in mood and personality, and loss of initiative.

Q: At what age is Alzheimer’s most common?

A: Though it can occur earlier, Alzheimer’s is most prevalent after age 65, with risk doubling about every 5 years beyond that. After age 85, nearly one-third of people develop Alzheimer’s. However, onset in a person’s 40s or 50s called younger-onset Alzheimer’s, occurs in about 5% of cases. 

Q: Is Alzheimer’s genetic? 

A: Alzheimer’s has a strong genetic component, though lifestyle and environmental factors also contribute to risk. Having a parent, sibling, or child with Alzheimer’s increases risk. The APOE e4 gene variant is linked to increased beta-amyloid protein buildup in the brain. However, not all those with this gene develop Alzheimer’s, and some without it still develop the disease.

Q: Can Alzheimer’s be prevented or cured?

A: There is currently no cure for Alzheimer’s disease, nor any way to stop or slow its underlying brain degeneration. However, focusing on a healthy lifestyle including diet, exercise, cognitive activity, social engagement, and managing medical issues provides the best chance to prevent or delay the onset of symptoms. Though difficult, healthy changes at any point in life offer benefits to long-term brain health.

Q: What should you do if you notice early symptoms of Alzheimer’s?

A: If you notice potential early signs of Alzheimer’s in yourself or someone close to you, schedule an evaluation right away, as early diagnosis offers the most options. Your doctor can check for reversible causes and underlying medical conditions, provide treatment if appropriate, and connect you with support resources to help manage symptoms and plan for the future. Staying mentally and socially active is also important.

Dr. Jun Ren is a dedicated and experienced registered dietitian and nutritionist who is committed to helping people achieve their health goals through personalized nutrition plans. With a passion for promoting healthy eating habits and preventing chronic diseases, Dr. Ren has been able to assist numerous clients in improving their overall quality of life.

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