Your Aging Brain: What Happens as We Grow Older and How to Protect Your Brain Health

By Nancy Rarick

Healthy Aging | Brain Health | Women's Wellness | Life After 60

We often notice the physical changes that come with aging. Our bones may gradually lose density, our muscles may lose strength, and our skin may become thinner and less elastic. But what happens to our brains as we grow older?

More importantly, what can we do to keep our brains healthy, our minds engaged, and our memories strong as we move through our 60s, 70s, 80s, and beyond?

The good news is that although the brain changes with age, aging does not automatically mean losing our memory, independence, or ability to learn new things. Our brains remain remarkably adaptable throughout life.

Understanding these changes is the first step toward making informed choices that support lifelong brain health.

1. What Happens to the Brain as We Age?

The brain is an extraordinary organ consisting of billions of nerve cells, called neurons, that communicate through an intricate network of connections.

As we age, several changes can occur:

Changes in brain volume

Certain areas of the brain may gradually decrease in volume over time. These include the prefrontal cortex, which plays an important role in planning, decision-making, and attention, and the hippocampus, which is essential for learning and memory.

However, brain-volume changes vary considerably between individuals. They are not, by themselves, proof of dementia or serious cognitive impairment.

Changes in neural connections

Neurons communicate through connections called synapses. Some connections may become less efficient or decrease with age. This can affect how quickly we process information, retrieve memories, and respond to new situations.

Changes in myelin

Myelin is a protective covering around many nerve fibers that helps electrical signals travel efficiently. Age-related changes in myelin can affect communication between different areas of the brain.

Changes in neurotransmitters

Neurotransmitters are chemical messengers that allow nerve cells to communicate. Age-related changes in some neurotransmitter systems can influence attention, mood, memory, and other cognitive functions.

Changes in brain plasticity

Neuroplasticity is the brain's ability to adapt, reorganize, and form or strengthen connections in response to learning and experience.

One important protein involved in this process is brain-derived neurotrophic factor (BDNF), which supports neuronal health and plasticity. Research suggests that aging and certain health conditions can influence BDNF levels.

The encouraging news is that learning, physical activity, and stimulating experiences can continue to support brain function throughout adulthood.

Changes in blood flow and cellular health

The brain requires a continuous supply of oxygen and nutrients. Changes in blood vessels, cardiovascular health, inflammation, and cellular energy production can affect brain function.

This is one reason why taking care of our heart and circulation is also an important part of taking care of our brains.

2. Normal Brain Aging Is Not the Same as Dementia

It is important to understand that occasional forgetfulness does not necessarily indicate Alzheimer's disease or another form of dementia.

Normal age-related changes may include:

• Taking a little longer to recall someone's name.

• Needing more time to learn unfamiliar information.

• Occasionally forgetting where you placed your keys.

• Finding it harder to concentrate when several things happen simultaneously.

• Taking longer to switch between tasks.

These experiences can occur with normal aging.

More concerning changes include persistent difficulty managing finances, getting lost in familiar places, struggling with previously familiar daily activities, or experiencing significant changes in judgment and reasoning.

If memory or thinking problems begin interfering with everyday life, it is important to consult a healthcare professional. Some causes of cognitive difficulties are treatable, and early assessment can make a difference.

3. Fourteen Risk Factors Associated With Dementia

What can we do to reduce our risk of cognitive decline?

A landmark 2024 report from the Lancet Commission on Dementia Prevention, Intervention, and Care identified 14 potentially modifiable risk factors associated with dementia.

The researchers estimated that addressing these factors could potentially prevent or delay approximately 45% of dementia cases at a population level.

This is an important finding. It does not mean that every individual can eliminate 45% of their personal risk, or that dementia can always be prevented. Genetics, age, medical history, and other factors also matter.

The 14 risk factors include:

1. Less education: Limited educational opportunities earlier in life can affect cognitive reserve.

2. Hearing loss: Untreated hearing difficulties can contribute to social isolation and cognitive strain.

3. High LDL cholesterol: Elevated LDL cholesterol, particularly during midlife, is associated with increased dementia risk.

4. Depression: Depression is associated with cognitive health and deserves appropriate attention and treatment.

5. Traumatic brain injury: Significant head injuries can increase the risk of later cognitive problems.

6. Physical inactivity: Insufficient physical activity affects cardiovascular and metabolic health.

7. Smoking: Tobacco use damages blood vessels and contributes to vascular disease.

8. Diabetes: Poorly controlled blood sugar and type 2 diabetes are associated with increased cognitive health risks.

9. High blood pressure: Hypertension can damage blood vessels supplying the brain.

10. Obesity: Excess body weight, particularly during midlife, is associated with increased dementia risk.

11. Excessive alcohol consumption: Heavy alcohol use can damage the brain and increase other health risks.

12. Social isolation: Limited social connection is associated with increased dementia risk.

13. Air pollution: Exposure to polluted air, including fine particulate matter, is associated with poorer brain health.

14. Untreated vision loss: Vision impairment can affect cognitive stimulation, independence, and social engagement.

These factors remind us that brain health is influenced by much more than memory exercises or brain-training games. It is closely connected to our overall physical, emotional, and social well-being.

4. Three Areas Deserving Special Attention

Although the Lancet Commission does not identify three universally most important risk factors for every individual, several areas deserve particular attention.

Type 2 Diabetes and Blood Sugar Management

Type 2 diabetes is an important risk factor associated with cognitive decline and dementia.

Persistently elevated blood sugar can damage blood vessels and contribute to inflammation and other metabolic complications.

Chronic stress, poor sleep, physical inactivity, and an unhealthy dietary pattern can make blood sugar management more difficult.

What can we do?

• Limit sugary drinks and highly refined carbohydrates.

• Choose fiber-rich vegetables, legumes, and whole grains.

• Include adequate protein in meals.

• Maintain regular physical activity.

• Monitor blood glucose as recommended by your healthcare provider.

• Seek medical guidance to manage diabetes and other metabolic conditions.

There is no need to eliminate every carbohydrate. The goal is a balanced, sustainable eating pattern that supports metabolic health.

Air Pollution and Brain Health

Air pollution is another important environmental risk factor.

Traffic-related pollution can contain nitrogen dioxide, carbon monoxide, ozone, and fine particulate matter. Some of these pollutants can enter indoor environments as well.

Research has associated long-term exposure to air pollution with an increased risk of cognitive decline and dementia.

Practical steps to reduce exposure include:

• Check local air-quality reports when possible.

• Avoid strenuous outdoor exercise near heavy traffic or during periods of poor air quality.

• Keep windows closed when outdoor pollution levels are particularly high.

• Consider an appropriately sized HEPA air purifier for indoor particle reduction.

• Remove shoes before entering your home to reduce the amount of outdoor dust and contaminants brought inside.

• Avoid indoor smoking and reduce other sources of indoor air pollution.

An air purifier can help reduce airborne particles, but it does not remove every type of pollutant. Ventilation and source control remain important.

Alcohol Consumption

Alcohol deserves an honest conversation when discussing healthy aging.

Excessive alcohol consumption is associated with increased dementia risk and can negatively affect sleep, balance, blood pressure, and overall brain function.

It is also important to understand that alcohol is not a treatment for back spasms, muscle tension, or magnesium deficiency.

While some older studies suggested potential benefits from light alcohol consumption, alcohol should not be started as a strategy for protecting the heart or brain.

If you drink, consider discussing your consumption with your healthcare provider, particularly if you take medication or have health conditions that may interact with alcohol.

For brain health, avoiding excessive alcohol is an important step.

5. Nutrition: Feed Your Brain Well

The brain requires a consistent supply of nutrients to maintain its structure and function.

A Mediterranean-style eating pattern is one approach that has received considerable attention in research on cardiovascular and cognitive health.

Consider including:

• Extra-virgin olive oil: A source of monounsaturated fats and beneficial plant compounds.

• Leafy green vegetables: Rich in folate and other nutrients.

• Berries: Contain antioxidant compounds called polyphenols.

• Fatty fish: Provide omega-3 fatty acids.

• Nuts and seeds: Supply healthy fats, minerals, and fiber.

• Beans and lentils: Provide plant protein and fiber.

• Whole grains: Support a fiber-rich dietary pattern.

Olive oil is a particularly useful replacement for butter and other saturated-fat sources in many meals. However, it should not be considered a treatment for inflammation caused by air pollution.

Rather than looking for one miracle food, focus on the overall quality and consistency of your diet.

6. Exercise: One of the Best Investments in Brain Health

Physical activity benefits much more than our muscles and bones.

Regular exercise supports cardiovascular health, circulation, metabolic function, mood, sleep, and cognitive well-being.

For women over 60, a balanced exercise routine might include:

Aerobic exercise: Walking, swimming, dancing, or cycling can improve cardiovascular fitness.

Strength training: Resistance exercises help preserve muscle mass, strength, and independence.

Balance exercises: Tai chi and appropriate balance activities can help reduce the risk of falls.

Flexibility: Gentle stretching and mobility exercises help maintain comfortable movement.

The World Health Organization generally recommends that older adults aim for 150–300 minutes of moderate-intensity aerobic activity each week, along with muscle-strengthening activities on at least two days.

Balance-focused activity is also particularly important for older adults at risk of falls.

If you have health limitations or have been inactive, begin gradually and consult your healthcare professional about an appropriate exercise program.

7. Sleep, Stress, and Emotional Well-Being

Brain health is not just about what we eat or how much we exercise.

Our emotional well-being and quality of sleep matter, too.

Sleep

Sleep supports memory consolidation and other essential brain processes. Poor sleep can affect concentration, mood, and memory.

Aim for a consistent sleep schedule and a comfortable sleep environment. Persistent insomnia, loud snoring, or excessive daytime sleepiness deserves medical attention.

Stress management

Chronic stress can affect sleep, mood, concentration, and metabolic health.

Consider activities such as:

• Deep breathing.

• Meditation.

• Gentle yoga.

• Time outdoors.

• Journaling.

• Enjoyable hobbies.

You do not need to eliminate every source of stress. Learning healthier ways to respond to stress can make a meaningful difference to your well-being.

Social connection

Human connection is essential at every age.

Maintaining friendships, participating in community activities, joining a group, volunteering, and spending time with family can provide emotional support and mental stimulation.

Do not underestimate the value of a meaningful conversation or a shared activity.

8. Keep Learning: Your Brain Can Continue to Grow

One of the most encouraging aspects of neuroscience is neuroplasticity.

Our brains can continue adapting throughout life.

Learning something new challenges the brain and creates opportunities to strengthen neural connections.

You might try:

• Learning a new language.

• Taking a painting or music class.

• Reading books outside your usual interests.

• Playing strategy games.

• Learning a new recipe.

• Traveling and exploring unfamiliar places.

• Developing a new skill or hobby.

The objective is not simply to complete puzzles or memorize information. It is to stay curious, engaged, and willing to experience new things.

You are never too old to learn something new.

9. Your Brain Health Action Plan After 60

Protecting brain health does not require a complicated or expensive program.

Start with manageable habits that you can maintain.

Here are seven practical commitments:

1. Schedule regular medical checkups and monitor blood pressure, cholesterol, and blood sugar.

2. Move your body every day and include strength and balance exercises.

3. Eat a varied, nutrient-rich diet with plenty of vegetables, fruit, whole grains, and healthy fats.

4. Prioritize restorative sleep.

5. Maintain meaningful relationships and social activities.

6. Challenge your brain by learning something new.

7. Avoid smoking, limit alcohol, and reduce exposure to environmental pollutants where possible.

Remember that small, consistent improvements are often more sustainable than dramatic lifestyle changes.

10. It Is Never Too Late to Invest in Your Brain

Aging is a natural part of life, but we do not have to approach it passively.

Although we cannot control every aspect of brain aging, research increasingly shows that many lifestyle and health factors associated with dementia risk can be addressed.

We can work toward better cardiovascular health, stronger muscles, improved balance, healthier nutrition, meaningful relationships, and continued learning.

And perhaps most importantly, we can change the way we think about growing older.

Our 60s, 70s, and beyond can be years of exploration, growth, connection, and renewed purpose.

Your brain deserves the same attention and care that you give to the rest of your body.

Let's make healthy brain aging part of our commitment to living a longer, healthier, and more fulfilling life.

A Personal Invitation from Nancy

I am passionate about helping women over 60 understand their health, embrace change, and discover new possibilities for the years ahead.

Brain health is just one part of healthy aging. I believe that with the right knowledge, encouragement, and practical strategies, we can make informed choices that support our physical, mental, and emotional well-being.

If you would like to learn more about my approach to healthy aging, lifestyle renewal, and personal growth, I invite you to visit my website.

Visit nancyrarick.com and leave me a message. I would love to hear from you!

Here's to aging with strength, confidence, curiosity, and purpose.

Medical Disclaimer

This article is intended for general educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Individual health needs differ. Consult a qualified healthcare professional before making significant changes to your diet, exercise routine, medication, or treatment plan.

References and Further Reading

1. Livingston, G., et al. (2024). Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission. The Lancet. https://doi.org/10.1016/S0140-6736(24)01296-0

2. World Health Organization (2026). Risk reduction of cognitive decline and dementia: WHO guidelines, second edition.https://www.who.int/publications/i/item/9789240123557

3. World Health Organization. Physical activity.https://www.who.int/news-room/fact-sheets/detail/physical-activity

4. National Institute on Aging. Cognitive Health and Older Adults.https://www.nia.nih.gov/health/brain-health/cognitive-health-and-older-adults

5. National Institute on Aging. What Do We Know About Healthy Aging?https://www.nia.nih.gov/health/healthy-aging