Several approaches can help with Alzheimer’s disease, ranging from medications that slow cognitive decline to lifestyle changes that protect brain health. No single treatment reverses Alzheimer’s, but combining medical therapies with the right daily habits can meaningfully slow progression, ease symptoms, and improve quality of life for both the person with the disease and their caregivers.
Medications That Slow the Disease Itself
Two newer immunotherapy drugs, lecanemab (Leqembi) and donanemab (Kisunla), are the first FDA-approved treatments that target the underlying biology of Alzheimer’s rather than just managing symptoms. Both work by clearing amyloid plaques from the brain. In clinical trials, donanemab reduced the rate of cognitive and functional decline compared to placebo over 76 weeks, with statistically significant improvements in both thinking ability and the capacity to handle daily tasks like managing finances or remembering appointments.
These treatments are only approved for people in the early stages: mild cognitive impairment or mild dementia. Eligibility requires confirmation of amyloid buildup in the brain through a PET scan or spinal fluid test. They are not options for moderate or advanced Alzheimer’s, which is why early diagnosis matters so much.
Medications That Manage Symptoms
For people already living with mild to moderate Alzheimer’s, a class of drugs called cholinesterase inhibitors (donepezil, rivastigmine, galantamine) remains the standard treatment. These medications boost levels of acetylcholine, a chemical messenger involved in memory and learning, and are considered cognitive enhancers. They don’t stop the disease from progressing, but they can delay decline in thinking, daily functioning, and behavior.
As the disease moves into moderate and severe stages, memantine is often added. Memantine works differently: it regulates glutamate, a brain chemical that, when overactive, can damage nerve cells. It’s particularly helpful for agitation and sundowning, the restlessness and confusion that often worsen in the late afternoon and evening. Research shows that combining a cholinesterase inhibitor with memantine improves cognitive function beyond what either drug achieves alone, reduces the need for caregiver assistance, and delays nursing home placement.
The MIND Diet
Diet is one of the most accessible tools for protecting brain health. The MIND diet, a hybrid of the Mediterranean and DASH diets, was specifically designed to support cognitive function. It emphasizes leafy greens, berries, nuts, whole grains, fish, poultry, olive oil, and beans while limiting red meat, butter, cheese, pastries, and fried food.
A prospective study of 923 adults followed over an average of 4.5 years found that those who followed the MIND diet most closely had a 53% lower rate of developing Alzheimer’s compared to those who followed it least. Even moderate adherence was meaningful: people in the middle range of MIND diet scores still had a 35% reduction in risk. The strongest followers showed a rate of cognitive decline equivalent to being 7.5 years younger than the weakest followers. Unlike many dietary interventions, you don’t have to be perfect. Even partial adherence offers protection.
Exercise and Brain Volume
Physical activity is one of the best-studied ways to protect the brain as you age. A meta-analysis of exercise interventions found that regular physical activity preserves the volume of the hippocampus, the brain region most critical for forming new memories and one of the first areas damaged by Alzheimer’s. The key finding: exercise programs lasting longer than 24 weeks produced significant effects, while shorter programs did not. You don’t need to train like an athlete. Programs involving less than 150 minutes per week of activity showed a significant benefit, which works out to about 30 minutes of walking, swimming, or cycling on most days.
Consistency over months matters more than intensity. The goal is sustained activity that becomes part of your routine, not bursts of vigorous exercise followed by long stretches of inactivity.
Sleep and Brain Cleaning
During deep sleep, your brain activates a waste-clearance system that flushes out toxic proteins, including the amyloid that accumulates in Alzheimer’s. This system, sometimes called the glymphatic system, works by expanding the spaces between brain cells during sleep, allowing cerebrospinal fluid to flow through and carry away metabolic waste. During waking hours, this system is largely disengaged.
The most important phase is slow-wave sleep, the deepest stage of non-REM sleep. Slow brain waves during this stage create pulses of fluid that drive the cleaning process. Poor sleep, sleep apnea, and chronic sleep disruption all reduce the time spent in this deep phase, potentially allowing harmful proteins to build up over years. Prioritizing 7 to 8 hours of quality sleep, treating sleep disorders, and maintaining consistent sleep and wake times are practical ways to support this process.
Omega-3 Fatty Acids
Among supplements studied for Alzheimer’s prevention, omega-3 fatty acids have the strongest evidence. A large analysis incorporating 48 longitudinal studies and over 103,000 participants found that dietary intake of omega-3s lowered the risk of dementia or cognitive decline by roughly 20%. DHA, the type of omega-3 most concentrated in the brain, drove much of this benefit. Each additional 0.1 grams per day of DHA or EPA intake was associated with an 8 to 10% lower risk of cognitive decline.
Dosage appears to matter. Trials using high doses (0.9 to 1.8 grams per day of combined DHA and EPA) improved cognitive function, while low doses (under 0.7 grams per day) showed no benefit. In one cohort study, long-term omega-3 supplement users had a 64% reduced risk of developing Alzheimer’s over six years. There’s also an interesting genetic angle: people who carry the APOE ε4 gene variant, the strongest genetic risk factor for Alzheimer’s, may benefit most from omega-3 intake, while noncarriers showed less of an effect.
Cognitive Stimulation Therapy
Structured mental and social engagement, known as cognitive stimulation therapy (CST), involves group activities like word games, discussions, puzzles, and creative tasks. It’s one of the most effective non-drug treatments for people already diagnosed with dementia. In a randomized trial, participants who received eight weeks of CST showed significant cognitive improvement: their scores on a standard cognitive test rose from 16.15 to 18.27, while the control group’s scores actually declined from 16.30 to 14.83 over the same period.
CST also reduced behavioral symptoms like agitation and anxiety, and it lowered caregiver burden. Word recall, orientation, ability to follow commands, and recognition memory all improved in the treatment group. These sessions don’t require special equipment or a clinical setting. Many community organizations, senior centers, and memory care programs offer CST groups, and some elements can be adapted for home use.
Treating Hearing Loss
Hearing loss is increasingly recognized as a modifiable risk factor for cognitive decline. An NIH-funded clinical trial of nearly 1,000 adults ages 70 to 84 found that among those at higher risk for dementia, wearing hearing aids reduced the rate of cognitive decline by almost 50% over three years. Participants who received hearing aids also reported substantial improvements in their ability to communicate, which likely contributes to the cognitive benefit by keeping people socially engaged.
If you or a family member with Alzheimer’s risk has untreated hearing loss, addressing it is one of the simpler interventions available.
Managing Agitation and Sundowning
Behavioral symptoms like agitation, aggression, and sundowning are among the most distressing parts of Alzheimer’s for caregivers. Several non-drug strategies can help. Reducing noise and clutter in the home lowers sensory overload. Playing soothing music and keeping familiar photos and objects visible provides comfort and orientation. Letting natural light into the home during the day helps regulate the internal body clock, which tends to become disrupted as the disease progresses.
When agitation does arise, distraction often works better than reasoning or correction. Offering a snack, suggesting a walk, folding laundry together, or turning on a favorite show can redirect attention. Sticking to a predictable daily schedule reduces confusion and the anxiety that comes with it. Arranging time outdoors or near a window for sunlight exposure each day is particularly helpful for reducing late-afternoon restlessness.