# Alzheimer
What is it
Alzheimer is a brain disease in which brain cells gradually die. This leads to loss of memory and cognitive functions — thinking, reasoning, speaking, concentration. Alzheimer is a form of dementia, and the most common cause of dementia worldwide.
In the Alzheimer brain, two types of abnormalities develop and accumulate: protein clumps (amyloid plaques) outside the cells and tangled protein threads (tau-tangles) inside. These damage the connections between brain cells (synapses) and cause cell loss. The process usually begins unnoticed years before the first symptoms.
Alzheimer is a progressive, incurable disease. It is usually only noticed when memory and thinking ability noticeably decline. By that time, the brain changes have already been active for years.
Causes
The cause of Alzheimer is not yet fully understood. Multiple factors likely play a role:
**Genetics:** Certain genes influence risk. The APOE4 gene is strongly associated with increased risk. People who have two copies of this gene are more likely to develop Alzheimer than others.
**Age:** Alzheimer almost always occurs from age 65 onwards. The older you become, the higher the risk. This is the strongest risk factor.
**Family history:** Family members of people with Alzheimer have more risk themselves, especially if multiple family members have it.
**Cardiovascular health:** A healthy heart and blood vessels appear to be protective. Heart and blood vessel disease, high blood pressure, high cholesterol and diabetes are associated with increased Alzheimer risk.
**Lifestyle:** Regular physical exercise, cognitive activity, social contact and healthy diet are associated with lower risk. Sleep quality also plays a role.
**Brain injury:** Previous head injuries can increase risk.
**Inflammation:** Various studies suggest that chronic inflammation in the brain contributes to Alzheimer changes, possibly through changes in the brain's immune cells.
How the disease progresses
Alzheimer progresses in three roughly distinguishable phases, which often gradually merge into each other. The duration and speed differ greatly from person to person.
**Early phase:** This can last for years. Many people have minor memory lapses, difficulty finding words, or have trouble with complex tasks. They notice themselves that things are changing. Family may not always notice it yet. The person can usually still function reasonably independently.
**Middle phase:** This is usually the longest phase, sometimes many years. Memory gets worse, confusion increases. The person may have difficulty recognizing people and places. Behavioral changes occur. Help needed with daily tasks such as washing and dressing. Sleep disturbances are common. Wandering and restlessness may occur.
**Late phase:** Physical decline becomes dominant. Speech becomes minimal or impossible. The person no longer recognizes loved ones. Help is needed for all daily life activities — eating, drinking, toileting, mobility. Eating and swallowing problems can develop. Infections (especially pneumonia) and other medical complications become more likely.
The speed of decline varies greatly. Some decline slowly over ten or more years; others progress faster.
Symptoms by phase
**Early phase:**
- Memory problems (forgetting small things, for example appointments or names)
- Difficulty finding words
- Difficulty with routine tasks at work or hobby
- Mild confusion about dates or sense of time
- Mild mood or behavioral changes
- Caution or withdrawal in social situations
**Middle phase:**
- Serious memory problems (not recognizing acquaintances, forgetting recent events)
- Confusion about place and time
- Behavioral changes (restlessness, aggression, suspicion, wandering, repetitive behavior)
- Sleep problems
- Incontinence
- Speech and language difficulties
- Eating problems
**Late phase:**
- Loss of speech and understanding
- Loss of control over toilet and bowel functions
- Loss of mobility (inability to walk)
- Eating and swallowing difficulties
- Physical rigidity
- Reflex actions (twitches and reflexes)
- Repeated infections
- Usually in fetal position
What it means for daily life
Alzheimer affects not only the person with the disease, but entire families and loved ones.
**For the person with Alzheimer:** In the early stage, many people notice changes themselves and can become anxious or frustrated. They may no longer perform their work well or lose trust in their memory. As the disease progresses, independence becomes increasingly difficult. Many people need help with personal hygiene, dressing, eating. In the late stage, complete dependence is the rule. Communication becomes minimal. Many people seem aware of changes, but in some this awareness seems to diminish.
**For caregivers:** Family members usually provide care in the early and middle stages. This brings emotional burden, physical exhaustion, and often financial consequences. There must be supervision, help with daily tasks, medication management, appointments. Many caregivers feel overwhelmed. In the late stage, professional help (home care, nursing home) is usually needed.
**Practical changes:** The home may need to be adapted for safety. Driving must be stopped. Financial and legal matters (inheritance, power of attorney) must be arranged while this is still possible. Medical appointments become more frequent.
**Emotional:** Grief, sadness, frustration and guilt are common among loved ones. The person who was known changes or gradually disappears.
Outlook
Alzheimer is currently incurable. There is no treatment that stops or reverses the process.
**Medications:** There are some medications used in certain stages. These can slow the progression somewhat or reduce certain symptoms, but do not prevent decline. Most medications work best in earlier stages.
**Research:** Much research is underway into new approaches — for example targeting amyloid proteins, anti-inflammatory drugs, or changes in diet and lifestyle. Much is promising, but there are still no breakthroughs that alter the course of the disease.
**Survival data:** Worldwide, people with Alzheimer die on average 8–10 years after diagnosis, but this varies greatly (from 3 to 20 years). Survival rates say nothing about one individual. Death usually does not come directly from Alzheimer, but from complications (pneumonia, malnutrition, other medical conditions).
**Outlook per person:** This depends on age at diagnosis, rate of decline, presence of other diseases, and care and support available. No one can predict how it will be for you or your loved ones.
**Quality of life:** Many people with Alzheimer in the early stage can still be relatively independent and active for years. Attention to safety, routine, social contact and meaningful activities helps quality of life.
Frequently asked questions
**Is Alzheimer the same as normal age-related forgetfulness?**
No. Normal forgetfulness comes with age — for example, not remembering a name for a moment, or forgetting where you put your keys. Alzheimer is different: memory deteriorates significantly, the onset of symptoms increases, and daily functioning becomes impaired. If you are truly concerned about yourself or a loved one, testing is worthwhile.
**Can you prevent Alzheimer?**
Complete prevention is probably not possible, especially if you have certain genes. But scientific research suggests that certain things can reduce the risk: physical exercise, mental activity, social contacts, healthy diet, and good sleep. Cardiovascular health also seems protective. This offers no guarantee, but can contribute to healthy aging.
**Can my child inherit Alzheimer from me?**
In most people with Alzheimer's (late-onset, after age 65), the risk for children is somewhat higher than average, but not certain. If you have family members with Alzheimer's before age 60 (very rare, early-onset), genetic testing can sometimes be worthwhile. This requires a conversation with a genetic counselor.
**What can I do if someone close to me develops Alzheimer's?**
It's important to inform yourself, support the person, and ensure safety (for example, stop driving, monitor access to medications). For yourself: take good care of yourself, seek support from other caregivers or professional help. A general practitioner can refer you to specialized care and support.
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_This information never replaces a doctor's judgment. Always discuss your situation with your own healthcare provider._