If your mind feels slower than it used to, you lose your train of thought mid-sentence, or you keep forgetting where you put things, you are asking one of the most common questions about brain health. The short answer is that cognitive health is the ability to think, learn and remember clearly, and the NIA’s cognitive health page describes it as one part of overall brain health. Memory and attention are separate skills that can slip for different reasons, so the first useful step is working out which one is giving you trouble.
What does cognitive health include?
The National Institute on Aging describes cognitive health as the ability to think, learn and remember clearly, and says you need it for everyday tasks such as driving, paying bills, taking medicine and cooking. Genetic, environmental and lifestyle factors all play a part. You cannot change your genes, but many environmental and lifestyle factors can be changed or managed.
Several separate skills sit under that umbrella. This table sets out the four ideas people most often mix up.
| Concept | What it covers | What the sources say |
|---|---|---|
| Memory | Holding on to what you learned or did, and getting it back later | The NIA says serious memory problems make everyday tasks hard, such as driving, using the phone and finding your way home. |
| Attention | Focusing on what is in front of you right now | The NIA says depression can lead to confusion or attention problems. |
| Executive function | Planning, reasoning, and keeping one idea in mind while weighing others | The NINDS Brain Basics fact sheet says the frontal lobes do much of the work when you plan a schedule or use reasoned arguments. |
| Diagnosed disease | A named condition with its own cause, such as stroke, delirium or Alzheimer’s disease | The NIA says stroke can damage blood vessels in the brain, and NINDS says Alzheimer’s disease initially affects memory formation. |
How is memory different from attention?
Memory is about storing what you learned or did and bringing it back later. Attention is about focus in the present: staying with a conversation, a recipe or a bill while other things compete for your mind. They are separate skills, and they are often affected by different things.
The NIA’s memory page lists factors that can cause memory problems, including sleep problems, low vitamin B12 and medication side effects. The NIA says depression can lead to confusion or attention problems, and describes delirium as a sudden state of confusion.
| Possible cause | What it can look like |
|---|---|
| Sleep problems | Memory problems |
| Stress and negative emotions | Forgetfulness, which the NIA says is usually temporary |
| Medicine side effects | Confusion or memory loss |
| Low vitamin B12 | Memory problems |
| Depression | Confusion or attention problems |
| Delirium | A sudden state of confusion, often during a hospital stay |
Is a brain health check legit, and what is a mental acuity test?
A check run by a doctor is a real medical step. The NIA’s memory page says a doctor can perform tests and assessments to help find the source of memory problems, and may refer you to a neurologist, a doctor who specializes in diseases of the brain and nervous system. People with memory problems should make a follow-up appointment to check their memory every six to 12 months.
The NIA’s memory page lists the signs that it might be time to talk with a doctor:
- Asking the same questions over and over
- Getting lost in places you used to know well
- Having trouble following recipes or directions
- Becoming more confused about time, people and places
- Not taking care of yourself, such as eating poorly, not bathing or behaving unsafely
Forgetting something once in a while is normal at any age. If memory problems last after a few weeks, the NIA says to talk with your doctor.
Online quizzes and app scores are a different thing from a clinical assessment. The FTC health products compliance guidance, as of October 5, 2026, says health-related advertising must be truthful, not misleading and backed by science, and that the message an ad implies counts as a claim too. This is information, not legal advice.
What are the healthy tips for the brain?
The NIA’s cognitive health page lists habits that it says may support cognitive health and may reduce your risk of cognitive decline. Here they are in one table, with the NIA’s own wording turned into plain steps.
| Habit | What the NIA says |
|---|---|
| Stay physically active | Federal guidelines recommend at least 150 minutes of physical activity a week. Walking is a good start. |
| Sleep enough | Generally seven to nine hours each night. |
| Eat nutritionally dense food | Choose foods that are low in animal fats and high in vitamins and fiber. |
| Manage chronic conditions | High blood pressure, diabetes, depression and high cholesterol all matter for the brain. |
| Treat hearing and vision loss | Age-related sensory conditions are worth treating. |
| Limit alcohol and quit smoking | Some medicines can be dangerous when mixed with alcohol. Quit smoking, and avoid other nicotine products. |
| Review your medicines | Ask your doctor about side effects on memory, sleep and brain function. Do not stop a prescribed medicine without talking to your provider first. |
| Reduce fall risk | Falls and accidents can lead to brain injuries. |
| Stay socially connected | Volunteering, joining a group, or meeting online with people who share your interests. |
| Keep your mind engaged | Structured cognitive training appears to help older adults. |
| Manage stress | Stress and negative emotions can cause forgetfulness. Being active and socially engaged can help with memory and mood. |
| Get recommended health screenings | The NIA lists getting recommended health screenings as one of its steps for cognitive health. |
For the sleep and stress side of this, read how to support brain health.
Can brain games improve memory?
The NIA says cognitive training, designed to improve specific skills, appears to benefit the cognitive health of older adults. In the ACTIVE clinical trial, healthy adults over 65 (average age 73 at the start) improved in the area they trained: memory, reasoning or speed of processing. Gains in reasoning and speed remained up to 10 years after training. A separate analysis of 215 cognitive training trials, involving roughly 12,500 older adults, found improved cognition in healthy older adults and in people with mild cognitive impairment.
The NIA also warns that there is not enough evidence that commercially offered computer-based brain training apps have the same impact on thinking as the training used in clinical trials. Reading and other informal mental activities may offer benefits too, according to long-term observational studies. The NIA’s Preventing Alzheimer’s Disease page covers these findings.
Is social interaction good for the brain?
The NIA says researchers analyzed data from more than 7,000 participants age 65 and older. They found that high social engagement, such as visiting with neighbors and volunteering, was associated with better cognitive health later in life. An association is a link seen in the data, not proof that socializing causes the difference. The NIA suggests volunteering or joining an activity group, through an Area Agency on Aging, a senior center, a public library or an online group.
What happens if you don’t socialize for years?
What the NIA does say is that memory problems tied to stress, loneliness or big life changes, such as the death of a spouse, are usually temporary and improve as the emotions fade. If they persist after a few weeks, talk with your doctor. The NIA also notes that depression has been linked to dementia and that it is important to seek treatment for serious health problems like it.
What speeds up brain aging?
The NIA says genetic, environmental and lifestyle factors may contribute to a decline in thinking skills. Genetic factors cannot be controlled, but many environmental and lifestyle factors can be changed or managed. Among the health and lifestyle factors it links to cognitive health are:
- Chronic conditions such as high blood pressure, diabetes, depression and high cholesterol
- Stroke, which can damage blood vessels in the brain
- Untreated hearing or vision loss
- Smoking and alcohol use (the NIA advises quitting smoking and limiting alcohol)
- Poor sleep, and some medicines that can cause confusion or memory loss
- Falls and head injuries
The NIA’s Preventing Alzheimer’s Disease page notes that changes in the brain occur many years before the first symptoms of Alzheimer’s appear. It describes these early changes as a possible window of opportunity to prevent or delay memory loss, while adding that nothing has been proven yet to prevent Alzheimer’s.
What heals the brain the most?
The more concrete point comes from the NIA’s memory page: many memory problems have a treatable cause, such as thyroid, kidney or liver problems, low vitamin B12, medicine side effects or sleep problems. Those problems usually go away once the condition is successfully treated. Finding the cause is the most useful first move.
Can cognitive decline and dementia be reversed?
Memory problems from a treatable cause often improve once that cause is treated. For Alzheimer’s disease and other dementias, the NIA says nothing has been proven yet to prevent Alzheimer’s. It also says researchers cannot say for certain whether healthy lifestyle changes will protect against dementia, but that taking these steps may help reduce your risk. The NIA’s prevention page does not describe reversing dementia. If you have a diagnosis, the next step is a follow-up with the clinician who assessed it.
What does slow cognitive decline mean?
Cognitive decline means thinking skills, such as learning, remembering and handling everyday tasks, get weaker over time. To slow it means reducing how quickly that happens. The NIA uses the phrase “delay or slow age-related cognitive decline” when it discusses cognitive training. The prevention page also cites a 2017 review led by the National Academies of Sciences, Engineering, and Medicine, which found “encouraging but inconclusive” results for blood pressure management, physical activity and cognitive training. For the blood pressure side, see blood pressure and brain health.
What habit helps avoid dementia?
No single habit is proven to avoid dementia. The NIA says exercise may help brain health and thinking, but no clear link between physical activity and preventing Alzheimer’s has been documented, and questions remain about which types, how much and how often. Still, experts already encourage exercise for its many benefits, and walking is a good place to start.
Are there three foods neurologists want seniors to avoid?
Its advice is about the overall pattern: nutritionally dense foods, low in animal fats, high in vitamins and fiber. If one food is a particular concern for you, ask your doctor or a registered dietitian.
What is the MIND diet?
The NIA points to the MIND diet as one of the eating patterns researchers are studying. In a recent clinical trial, people who followed it had only small improvements in cognition, similar to people on a control diet with mild calorie restriction. Researchers are still studying these diets and individual foods.
Do supplements prevent cognitive decline?
The NIA says no vitamin or supplement is currently recommended for preventing Alzheimer’s or other forms of cognitive decline. It adds that recent clinical trials have shown a daily multivitamin may improve memory and cognition in older adults.
Ginkgo is often marketed for brain health. In the Ginkgo Evaluation of Memory (GEM) study, described by the NCCIH ginkgo overview, more than 3,000 people age 75 or older with normal cognition or mild cognitive impairment took ginkgo or a placebo for a median of six years. Dementia rates did not differ between the groups. The same overview says ginkgo may have a modest benefit for dementia symptoms, but the findings are inconsistent. It also says supplements marketed for brain health have uncertain effects on thinking in healthy people, and much of that research is of low quality.
What are the best supplements for brain health?
The NIA does not single out one supplement as the best. The most useful way to compare products is to work through three questions:
- What exactly does the product say it does for the brain?
- Has that exact ingredient been studied for that use, in people like you?
- Does the label list the same ingredient you read about?
The FTC’s guidance says the implied message of an ad counts as a claim and must be backed by science, so compare the wording of the pitch with what the research shows. The NIA also notes that medicines can interact with dietary supplements, so bring your list to your doctor before you start anything new.
Your next step
Start by naming the concern. Is it memory, meaning forgetting what you learned or did? Is it attention, meaning losing focus in the moment? Or is it a change that has lasted more than a few weeks? Bring the signs above to your next appointment. For the everyday symptoms, read Memory and Brain Fog, and for habits you can build now, start with how to support brain health.
By the Global MH Summit Research Team