Your midlife diet could keep your senior brain sharp
Fact checked by Nick Blackmer
Key Takeaways
- Eating a balanced and nutritious diet earlier in life may protect your cognitive function for your later years.
- While studies are exploring the link between diet and brain health, more research is needed on the relationship.
- It is never too late to improve your eating habits to support your lifelong health.
According to the preliminary results of a new study presented at the American Society for Nutrition’s annual NUTRITION 2024 conference, a nutritious diet early in life can protect against cognitive decline as you age.
The study analyzed data from the UK’s National Survey of Health and Development, a long-term health survey of over 3,000 people in the 1946 British Birth Cohort who were followed for almost seven decades.
The researchers discovered that participants who ate a higher-quality diet earlier in life were much more likely to have higher cognitive ability in their 60s and 70s than people who ate a lower-quality diet.1
Compared to other research on the subject, this study is unique because it shows how diet in early childhood and adulthood might affect cognition later in life. Most studies that have explored the link only looked at the quality of a person’s diet in their later adult years. This new study was the first to look at diet and cognitive abilities throughout life (from age 4 to 70).
“The benefits of diet [are] something we talk a lot about, and this study will add valuable information on how eating patterns directly and indirectly correlate with cognitive health,” Victor Henderson, MD, professor of epidemiology, population health, and neurology at Stanford University, told Verywell.
How Diet Affects Brain Health
What you eat affects many aspects of your overall well-being—from heart health to sleep, mood, and weight. Studies suggest that a nutritious diet may help protect against neurodegenerative disorders, including cognitive decline and dementia. A health-supporting diet may even help you live longer.23
Eating plans that are low in fat and processed sugars may boost brain health. Common examples of these types of diets include:2
- Mediterranean (plant-based foods and healthy fats)
- Nordic (eating locally sourced fruits, vegetables, and seafood)
- DASH (fruits, vegetables, whole grains, and lean protein)
- MIND (plant-based foods, nuts, fruit, leafy vegetables, whole grains, seafood, and poultry)
While the exact link between diet and brain health is not fully understood, researchers think that key micronutrients, such as B vitamins, iron, and antioxidants, may have a protective role in cognitive function (e.g., thinking, learning, and memory).2
It’s Never Too Late to Start Eating Better
Many adults didn’t get the chance to establish health-supporting eating habits early in life, and the effects of a diet that lacks nutrition are often felt when they hit middle age. At this phase of life, people often develop chronic conditions such as obesity, heart disease, diabetes, and sleep disorders.
However, experts stress that it is never too late to change your eating patterns to support and improve your health and reduce the symptoms of chronic disease.
“Diet can be a continuing factor in our health,” Kelly Cara, PhD, abstract presenter, a recent graduate of Tufts University’s School of Nutrition Science and Policy, and now a post-doctoral fellow at the American Cancer Society, told Verywell. “Cognitive health is one of many positive outcomes of eating a healthy diet. It is never too late to start.”
Many factors are involved in an individual’s diagnosis of dementia and cognitive decline, but diet is one modifiable lifestyle habit that can have a positive effect on well-being at any age. Changing what you eat now may help reduce your chances of developing cognitive problems later in life.4
What Foods Are Best for Brain Health?
Research suggests that the Mediterranean and DASH diets are beneficial for overall health as we age, but the MIND diet specifically targets the aging brain. In one study, 53% of participants who followed the MIND diet had lower rates of Alzheimer’s disease compared to people who followed Mediterranean the eating plan.5
To get the best results on the MIND diet, eat plenty of:6
- Whole grains (at least 3 servings a day)
- Vegetables (at least 1 serving per day)
- Leafy green vegetables (at least 6 servings a week)
- Nuts (at least 5 servings a week)
- Beans (at least 3 meals a week)
- Berries (at least 2 servings a week)
- Poultry (at least 2 meals a week)
- Fish (at least 1 meal a week)
- Olive oil as an added fat (if needed)
You can experiment with incorporating more of these foods into your diet, whether by mixing up your favorite recipes with new ingredients or adding these powerful foods to your plate more often.
What This Means For You
While more studies are needed to fully understand how your diet throughout your life affects your cognitive health, there is a lot of evidence that eating plenty of fruits, vegetables, and whole grains supports your lifelong well-being.
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