How to Improve Cognitive Health After 50: The Role of Nutrition and Exercise
Most of us want to stay physically healthy and independent as we get older. But maintaining the health of our brain is just as important.
What can you do today to support your memory, thinking and overall cognitive health as you age? And can nutrition and exercise help reduce the risk of cognitive decline?
Research increasingly suggests that many of the lifestyle factors we associate with cardiovascular and metabolic health may also play an important role in maintaining cognitive health.
Nutrition. Exercise. Cardiovascular fitness. Blood pressure. Blood sugar. Cholesterol. Sleep. Social connection.
There isn’t one food, supplement or exercise that can guarantee you’ll maintain perfect memory or prevent cognitive decline.
But that doesn’t mean cognitive aging is completely outside of our influence.
In fact, one of the most encouraging messages from the research is that many of the things we already know are good for our bodies may also be good for our brains.
I’m Kevin Grodnitzky, MS, RDN, LDN, a Registered Dietitian Nutritionist and founder of Nutrition Coaching Center.
I recently presented a workshop on Nutrition, Fitness & Brain Health examining what the research tells us about nutrition, exercise, cardiovascular fitness, memory and cognitive health.
Here are some of the most important things you can do to support your cognitive health as you age.
Can Lifestyle Help Reduce Cognitive Decline?
Our brains change as we get older, but not everyone experiences cognitive aging in the same way.
Age and genetics are obviously important factors we can’t change. But researchers have also identified a number of potentially modifiable factors associated with cognitive health.
These include physical activity, cardiovascular and metabolic health, smoking, blood pressure, diabetes, diet and other lifestyle factors.
That’s encouraging because it shifts the conversation away from searching for a miracle “brain food.”
Instead, we can ask a much more useful question:
What can I do today to create the healthiest possible environment for my brain as I age?
What Is the Best Diet for Cognitive Health?
You’ve probably heard about the Mediterranean diet and the MIND diet.
These eating patterns emphasize foods such as:
- Vegetables, particularly leafy greens
- Berries and other fruits
- Whole grains and other fiber-rich foods
- Nuts and seeds
- Fish
- Olive oil and other unsaturated fats
- Minimally processed foods
They also generally limit foods high in saturated fat and highly processed foods.
Observational research has associated greater adherence to Mediterranean- and MIND-style diets with better cognitive outcomes.
But it’s important to understand the limitations of the evidence.
In a large three-year randomized clinical trial involving older adults, cognition improved in both groups, but researchers did not find a statistically significant difference in cognitive change between the MIND-diet group and the control group.
So I wouldn’t tell someone that following the MIND diet will prevent cognitive decline.
I would say that an overall nutrient-dense dietary pattern is strongly aligned with cardiovascular and metabolic health—and may also be beneficial for maintaining cognitive health as we age.
Berries, Leafy Greens and Cognitive Health
Berries and leafy green vegetables receive a lot of attention in brain-health research.
Berries contain flavonoids and other bioactive compounds, while leafy greens provide folate, carotenoids, vitamin K and numerous other nutrients.
Some observational studies have associated greater intake of these foods with healthier cognitive aging.
They’re excellent foods to include in your diet.
But I wouldn’t think of blueberries or spinach as medicine for your brain.
The overall quality of your diet is likely far more important than any individual “superfood.”
Omega-3s and Brain Function
Fatty fish such as salmon, sardines and trout provide the long-chain omega-3 fatty acids EPA and DHA.
DHA is an important structural component of neuronal cell membranes and contributes to normal neuronal function and signaling.
EPA has important roles in inflammatory and lipid signaling and is involved in the production of compounds that help regulate and resolve inflammatory responses.
These are important biological functions.
But that doesn’t mean taking large amounts of fish oil will prevent cognitive decline.
I prefer to think of omega-3-rich foods as one component of an overall healthy dietary pattern rather than as a stand-alone solution for brain health.
Exercise and Cognitive Health
Exercise may be one of the most interesting areas of cognitive-health research.
Regular physical activity already has well-established benefits for cardiovascular health, blood pressure, glucose regulation, body-weight management, mobility and physical function.
Research has also repeatedly associated greater physical activity and higher cardiovascular fitness with better cognitive outcomes.
And some of the long-term research is fascinating.
Cardiovascular Fitness May Matter to Your Brain
One particularly interesting study I discussed in my recent Nutrition, Fitness & Brain Health presentation followed a group of Swedish women for approximately 44 years.
Their cardiovascular fitness was measured in midlife.
During follow-up, dementia developed in approximately:
5% of the highly fit women
25% of women with medium fitness
32% of women with low fitness
After statistical adjustment, the highly fit women had an 88% lower risk compared with the medium-fitness group. Among the highly fit women who eventually developed dementia, onset also occurred considerably later.
Those numbers are striking.
But this is where it’s important to separate association from causation.
This was an observational study. It doesn’t prove that becoming highly fit will reduce an individual’s risk by 88%.
Nevertheless, it adds to a larger body of evidence suggesting that cardiovascular fitness may be an important component of healthy cognitive aging.
And considering all of the other established health benefits of cardiovascular exercise, that’s another compelling reason to stay active.
Don’t Forget Strength Training
Cardiovascular exercise gets much of the attention when discussing brain health, but strength training deserves a place in the conversation too.
Maintaining muscle and strength becomes increasingly important as we age.
Resistance training can help preserve muscle mass, strength, mobility, glucose regulation and our ability to remain physically independent.
Research also suggests that resistance exercise may have beneficial effects on certain aspects of cognitive function.
For adults over 50, I generally don’t want people thinking they have to choose between cardio and strength training.
Both belong in a comprehensive healthy-aging program.
Blood Pressure, Blood Sugar and Cholesterol: Your Brain Is Part of Your Body
We sometimes talk about brain health as though the brain exists independently from everything else.
It doesn’t.
Your brain depends on an extensive network of blood vessels and a continuous supply of oxygen and nutrients.
High blood pressure can damage blood vessels.
Diabetes is associated with poorer cognitive outcomes and increased risk of cognitive decline.
Smoking damages vascular health.
Cardiovascular disease and vascular injury can affect the brain as well as the heart.
This is one of the most important concepts I want people over 50 to understand:
Taking care of your cardiovascular and metabolic health is also part of taking care of your brain.
Do Brain-Health Supplements Improve Cognition?
Walk through almost any supplement aisle and you’ll find products promising better memory, focus and brain health.
Unfortunately, the marketing is often much stronger than the evidence.
There isn’t convincing evidence that the typical “brain health” supplement will prevent cognitive decline in an otherwise well-nourished person.
Correcting an actual nutrient deficiency is different.
Vitamin B12, folate and other nutrients are necessary for normal neurological function, and deficiencies should be identified and treated appropriately.
But taking more isn’t necessarily better.
Before spending significant amounts of money on supplements marketed for your brain, I’d focus on the fundamentals first.
Sleep, Stress and Social Connection Matter Too
Nutrition and exercise aren’t the entire story.
Adequate sleep is important for memory, learning and normal brain function.
Chronic stress can affect both physical and psychological health.
Staying socially engaged and continuing to challenge yourself mentally may also contribute to healthier cognitive aging.
The good news is that you don’t need to optimize every aspect of your life perfectly.
Consistency matters more than perfection.
What Can You Do Today to Support Cognitive Health?
If you’re over 50 and want to support your brain as you age, start with the fundamentals:
Eat an overall nutrient-dense, Mediterranean/MIND-style diet.
Eat plenty of vegetables, fruits and fiber-rich foods.
Include healthy unsaturated fats and appropriate sources of omega-3s.
Exercise regularly.
Improve your cardiovascular fitness.
Strength train consistently.
Know and manage your blood pressure.
Pay attention to cholesterol and blood sugar.
Don’t smoke.
Prioritize adequate sleep.
Stay socially connected.
Keep challenging yourself mentally.
And don’t depend on an individual food or supplement to compensate for an unhealthy lifestyle.
Weight Loss After 50 Can Be About Much More Than Weight
This is where brain health connects naturally with the work I do with my clients.
I’ve specialized in helping people lose weight for years.
Some of my clients have lost more than 100 pounds without weight-loss medication. For many people I work with, losing approximately 25–50 pounds without a GLP-1 medication can be a realistic goal, depending on starting weight, health, lifestyle and individual circumstances.
But particularly after 50, I don’t believe successful weight loss should be measured only by what happens on the scale.
Losing weight can be an opportunity to improve the bigger picture.
Improve your nutrition.
Become more active.
Improve cardiovascular fitness.
Build and maintain muscle.
Work on blood pressure, cholesterol and blood sugar.
Improve your relationship with food.
And establish habits you can realistically maintain as you get older.
Whether you’re losing weight through nutrition and exercise alone or using a GLP-1 medication such as Zepbound or Wegovy, these fundamentals still matter.
The Bottom Line
We can’t guarantee that any particular diet, exercise program or lifestyle will prevent cognitive decline.
But we have plenty of reasons to take the health of our brains seriously long before cognitive problems develop.
And many of the behaviors that may support cognitive health also provide benefits throughout the rest of the body.
Eat well. Exercise. Improve your fitness. Maintain your strength. Manage cardiovascular and metabolic risk factors. Sleep. Stay connected. Keep using your brain.
You don’t have to wait until you’re older to benefit.
Better nutrition can improve your health today.
Exercise can improve your fitness today.
Strength training can make you stronger today.
Weight loss can improve important health markers today.
And at the same time, you may be creating a healthier foundation for your brain in the years ahead.
Want to Improve Your Health After 50?
If you’re 50+ and want to lose 25 pounds or more while improving your nutrition, fitness and overall health, my 12-Week VIP Health & Weight Loss Transformation Program provides personalized nutrition and meal planning, weekly one-on-one coaching, exercise guidance, accountability, education, daily motivation and ongoing support.
GLP-1 support is also available for clients using weight-loss medication.
The goal isn’t simply to weigh less.
It’s to become healthier, stronger and better prepared for the years ahead.
Schedule a consultation with Nutrition Coaching Center to learn more.
Kevin Grodnitzky, MS, RDN, LDN
Registered Dietitian Nutritionist
Nutrition Coaching Center
The Weight Loss Dietitian