Have your competent? doctor come back to you when they HAVE EXACT SPECIFICS FOR THIS DIET! This is just guidelines and NOT GOOD ENOUGH!
And then have your doctor check for the EXACT AMOUNT OF COFFEE TO DRINK DAILY for the same benefit! Your doctor better know the answer!
Coffee May Lower Your Risk of Dementia Feb. 2013
Coffee drinkers rejoice! Drinking coffee could lower the risk of Alzheimer’s disease
And this: Coffee's Phenylindanes Fight Alzheimer's Plaque December 2018
The latest here:
Healthy Plant-Based Eating Lowers Dementia Risk
Summary: It’s not just about eating plants, it’s about which plants you choose. A major study followed nearly 93,000 people over 11 years to investigate the link between plant-based diets and Alzheimer’s disease.
The researchers found that while eating more plants generally lowers risk, “unhealthful” plant-based diets, rich in refined grains and added sugars, actually increase the risk of dementia. The study suggests that switching toward a high-quality plant-based diet, even later in life, can significantly impact long-term brain health.
Key Facts
- The “Healthy” Benefit: Participants with the highest scores for a healthful plant-based diet had a 7% lower risk of dementia compared to those with the lowest scores.
- The “Unhealthy” Danger: Those who ate the most unhealthy plant foods (refined carbs and sugars) saw a 6% higher risk of dementia.
- The Power of Change: For people who changed their habits over a decade, shifting away from an unhealthful diet lowered risk by 11%, while shifting toward one increased risk by 25%.
- Late-Life Impact: The average starting age of participants was 59, proving that dietary improvements made in middle age and beyond still offer significant protective benefits for the brain.
- Broad Representation: The study is notable for its diversity, including African American, Japanese American, Latino, Native Hawaiian, and white participants.
Eating a higher quality plant-based diet is associated with a lower risk of Alzheimer’s disease and other related dementias compared to eating a lower quality plant-based diet, according to a study published April 8, 2026, in Neurology.
While the study shows an association based on observations, it does not prove that a higher quality plant-based diet causes a lower risk of dementia.
Researchers looked at three plant-based diets. The overall plant-based diet prioritizes eating more plant foods than animal products like meat, milk and eggs, without looking at quality. The healthful plant-based diet prioritizes healthy plant foods like whole grains, fruits, vegetables, vegetable oils, nuts, legumes and tea and coffee.
The unhealthful plant-based diet includes less healthy plant foods like refined grains, fruit juices, potatoes and added sugars. Researchers did not look at vegetarian or vegan diets.
“Plant-based diets have been shown to be beneficial in reducing the risk of diseases like diabetes and high blood pressure, but less is known about the risk of Alzheimer’s disease and other dementias,” said study author Song-Yi Park, PhD, of the University of Hawaii at Manoa’s Cancer Center in Honolulu.
“Our study found that the quality of a plant-based diet mattered, with a higher quality diet associated with a reduced risk, and a lower quality diet associated with an increased risk.”
The study involved 92,849 people with an average age of 59 at the start of the study. It included African American, Japanese American, Latino, Native Hawaiian and white participants. They were followed for an average of 11 years. During that time, 21,478 people developed Alzheimer’s disease or another related dementia.
Participants completed food questionnaires at the start of the study. Researchers determined how well people’s diets resembled the overall plant-based diet, the healthful plant-based diet and the unhealthful plant-based diet, by reviewing how many healthy and less healthy plant foods they ate, as well as animal fats, meat, dairy, eggs, fish and seafood. Participants were each given three scores based on how closely they followed the three plant-based diets.
Researchers then ranked the participants into five subgroups for each of the three diet scores.
After adjusting for factors like age, physical activity and diabetes, researchers found that when comparing people based on their score for the overall plant-based diet, the top subgroup who ate the most plant foods had a 12% lower risk of dementia compared to the lowest subgroup.
When people were compared based on their score for the healthful plant-based diet, the top subgroup had a 7% lower risk compared to the lowest subgroup. And when compared based on their score for the unhealthful plant-based diet, the top subgroup who ate the most unhealthy plant foods had a 6% higher risk of dementia than the lowest subgroup.
Among a smaller group of 45,065 participants who reported their diet again after 10 years, 8,360 participants later developed dementia. Researchers looked at diet changes over time.
When compared to people whose diets didn’t change, people whose diets changed the most toward following an unhealthful diet had a 25% higher risk of dementia while those whose diets changed the most away from following an unhealthful diet had an 11% lower risk.
“We found that adopting a plant-based diet, even starting at an older age, and refraining from low-quality plant-based diets were associated with a lower risk of Alzheimer’s and other dementias,” said Park.
“Our findings highlight that it is important not only to follow a plant-based diet, but also to ensure that the diet is of high quality.”
A limitation of the study was that researchers evaluated the diets based on food questionnaires completed by participants, but participants may not remember every detail of their diets accurately.
Funding: The study was supported by the National Institute on Aging and the National Cancer Institute at the National Institutes of Health.
Key Questions Answered:
A: Actually, the study suggests you might be at higher risk. “Unhealthful” plant-based diets (refined grains, potatoes, and sugar) were linked to a 6% increase in dementia risk. Being plant-based only helps the brain if you focus on “high-quality” whole foods.
A: Not at all. The study found that people who shifted their habits toward a healthier plant-based diet later in life still saw an 11% reduction in risk. Your brain is resilient, and “cleaning up” your diet in your 50s and 60s offers measurable protection.
A: While the study shows an association, other research suggests that refined sugars and grains cause spikes in blood sugar and inflammation. Since the brain is highly sensitive to metabolic health, these “unhealthy” plants likely stress the neural system rather than supporting it.
Editorial Notes:
- This article was edited by a Neuroscience News editor.
- Journal paper reviewed in full.
- Additional context added by our staff.
About this exercise and neuroscience research news
Author: Renee Tessman
Source: AAN
Contact: Renee Tessman – AAN
Image: The image is credited to Neuroscience News
Original Research: The findings will appear in Neurology
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