According to research reviewed by Gram, older adults with mild cognitive impairment showed improvements of about 2 points on the MoCA thinking test after six months of computer-based brain training combined with online nutrition counseling. In a 2026 randomized trial of 270 people, the specific type of training or diet plan made no clear difference.
A new trial from 2026 looked at whether brain training and nutrition coaching could help people with mild cognitive impairment, a stage where memory and thinking are weaker than normal but daily life is usually still manageable. The study followed 270 adults in Germany aged 60 and older for six months. Everyone completed online sessions, with some receiving advanced brain training and others basic training, and some receiving plant-based diet coaching and others standard healthy-eating advice. All four groups improved by about 2 points on the Montreal Cognitive Assessment, a 30-point thinking test. The type of program made no clear difference, and 55% of participants reached scores in the normal range. According to research reviewed by Gram, the findings suggest that taking part in both brain training and nutrition coaching may be worthwhile, though the study could not prove these programs caused the gains.
Key Statistics
A 2026 randomized controlled trial of 270 adults with mild cognitive impairment found that all four study groups improved by about 2 points on the Montreal Cognitive Assessment after six months.
In the same 2026 trial, 55% of participants scored in the normal range on the Montreal Cognitive Assessment after six months, although the study had no group that received no program for comparison.
The 2026 BrainFit-Nutrition trial found no significant difference between advanced and basic brain training or between plant-based and standard nutrition counseling, with an overall time effect that was small (partial eta-squared of 0.018).
The Quick Take
- What they studied: Researchers asked whether computer-based brain training and online nutrition coaching could improve thinking and memory in people with mild cognitive impairment, and whether the more detailed versions of these programs worked better than simpler versions.
- Who participated: 270 adults in Germany, aged 60 and older, who had been diagnosed with mild cognitive impairment. Everyone took part from home, and they were randomly split into four groups.
- Key finding: All four groups improved by about 2 points on the Montreal Cognitive Assessment after six months. The detailed and basic versions of each program produced similar results, and the overall time effect was small.
- What it means for you: Staying mentally active and eating a healthy diet may be reasonable steps for people with mild memory problems. This study cannot tell us how much of the improvement came from the programs themselves, so talk with a doctor before making changes.
The Research Details
This was a randomized controlled trial, which means participants were placed into groups by chance. This helps make the groups similar at the start, so differences found later are more likely to come from the programs. The study used a 2 by 2 design, which tests two different questions at once. One question was about brain training: half the participants received individualized training that adjusts to each person’s abilities, while the other half received basic training. The second question was about nutrition: half received whole-food plant-based counseling, and the other half received advice based on guidelines from the German Nutrition Society.
All sessions and testing were done remotely, using online tools and video or digital contact. Thinking ability was measured at the start and after six months using the Montreal Cognitive Assessment, a widely used 30-point screening test that checks memory, attention, language, and reasoning. The main analysis included 270 people who were assigned to groups, although 228 completed the final test and were included in one of the main calculations.
The researchers also planned to compare the two versions of each program directly. Each version was designed to look similar from the outside, so that the basic versions served as an active comparison rather than doing nothing at all. This helps show whether the specific details of a program matter.
A randomized design is one of the strongest ways to test whether an intervention works, because chance, rather than the researchers’ choices, decides who gets which program. Comparing two versions of each program also helps answer a practical question: whether expensive or complicated versions are needed, or whether simpler options can work just as well. Testing both brain training and nutrition together also reflects how people might actually use these approaches in daily life.
Remote delivery makes the study more realistic for people who cannot easily travel to a clinic. It also shows that these programs can be delivered at home, which may make them easier to reach for older adults.
The trial was pre-registered in a public registry (ISRCTN10560738) in 2021, which means the researchers committed to their plan before collecting results. This makes it harder to change the goals after seeing the data. The journal is a respected publication in the field of dementia research.
However, a few points lower confidence. The main comparison used only the participants who finished the study, which can bias results if people who dropped out were different. The main statistical result was close to the usual cutoff for significance, and the size of the time effect was small. Also, the study had no group that received no program at all, so the researchers could not measure how much of the improvement would have happened anyway, such as from practice with the test.
What the Results Show
After six months, people in all four groups showed a gain of about 2 points on the Montreal Cognitive Assessment. The average scores ranged from about 1.77 points in the group that received advanced brain training with plant-based counseling to about 2.44 points in the group that received advanced brain training with standard nutrition advice. Even though these numbers look different, the differences were not large enough to be considered meaningful. This means the four programs performed about the same.
When the researchers looked at the overall pattern, they found a statistically significant effect of time, meaning that scores changed over the six months. However, the size of this effect was small, which means that the time effect explained only a small part of the differences between people. The result was also close to the line researchers use to decide whether a finding is likely real, so it should be read with some caution.
After six months, 55% of participants scored in the range that is considered normal, rather than in the range that suggests mild cognitive impairment. This is an encouraging number, but without a comparison group that received no program, it is not possible to know how many of these people would have improved on their own.
The researchers concluded that the specific content of each program, whether advanced or basic, did not appear to change the outcome. Instead, the results suggest that doing something in both areas may be more important than choosing the most detailed version.
The study also looked at the differences between the detailed and basic versions of brain training and nutrition coaching, and found that neither version clearly outperformed the other. This suggests that people with mild cognitive impairment may not need the most advanced or expensive programs to see a benefit, although this finding needs confirmation in larger studies.
Because the programs were delivered online, the results also show that remote support can be a practical option for older adults. Participants were able to complete a six-month program from home, which is an important point for people who have trouble traveling to clinics. The researchers did not report detailed results for every secondary measure in the summary, so readers should look at the full paper for those details.
Earlier research has suggested that brain training and healthy eating may support thinking skills, particularly when combined. This study adds to that evidence by testing both approaches together in a large, carefully designed trial done entirely online. Some past studies on brain training have found short-term gains on specific tasks, but fewer have shown benefits on a broad screening test like the Montreal Cognitive Assessment over several months.
The finding that simpler programs worked as well as detailed ones is useful, because it suggests that accessible options may be just as valuable. Still, the researchers themselves noted that more studies are needed. Future trials should include a usual-care group, examine how these changes work in the brain, track whether the benefits last, and measure costs.
The most important limitation is that the study did not include a group that received no program or only usual care. Without this comparison, it is impossible to know how much of the improvement came from the programs and how much would have happened anyway. Repeated testing can also lead to better scores simply from practice, which is another reason a comparison group matters.
The main analysis included only participants who completed the study, which can change results if people who dropped out were different in important ways. The size of the overall time effect was small, so the improvement may not translate into noticeable changes in daily life, such as managing money, cooking, or driving. The study also did not measure whether these thinking changes last beyond six months.
Finally, all participants were in Germany and were volunteers who were willing to join an online study. Results may look different in other countries, among people with fewer digital skills, or among those with more severe memory problems.
The Bottom Line
Based on this trial, staying mentally active and eating a healthy diet are reasonable, low-risk steps for people with mild cognitive impairment. Confidence that these steps help is moderate, because the study was well designed but lacked a no-program comparison group and showed only a small overall effect. Doing both brain training and nutrition changes seems more useful than doing one alone, though the study did not directly compare doing one versus both. Choosing a simpler program appears to be fine, since advanced versions did not clearly work better.
People who have been told they have mild cognitive impairment, and their family members, may find these results useful. Caregivers and healthcare providers looking for low-cost, home-based options may also want to read the full study. People with dementia, severe memory loss, or other serious health conditions should not rely on these findings alone and should speak with a doctor before making major changes. People with healthy memory may still benefit from these habits, but this study did not test them in that group.
In this study, changes were measured after six months, so that is the timeframe the research supports. Some participants may notice changes sooner, but the trial did not track progress week by week. Whether benefits continue after the program ends is not yet known. Realistic expectations are that any gains are likely to be modest, and consistent effort over months may matter more than short bursts of activity.
Frequently Asked Questions
Can brain training and diet changes help improve memory in people with mild cognitive impairment?
Research reviewed by Gram found that a six-month program combining computer-based brain training with online nutrition counseling was linked to about 2-point gains on the Montreal Cognitive Assessment in a trial of 270 adults. Because there was no untreated comparison group, the gains cannot be attributed to the programs alone.
What is the MoCA test and how much does a 2-point change matter?
The Montreal Cognitive Assessment is a 30-point screening test that checks memory, attention, language, and reasoning. In a 2026 trial, a 2-point gain was modest, and the study did not show whether this change affects everyday tasks such as managing money, cooking, or driving.
Is a simpler brain training program as good as an advanced one?
In the 2026 BrainFit-Nutrition trial, individualized and basic brain training produced similar results on the MoCA after six months. Plant-based nutrition counseling and standard German Nutrition Society advice also showed no significant difference, suggesting that taking part in both areas may matter more than the specific version.
What percentage of people with mild cognitive impairment reached normal scores after brain training and nutrition counseling?
In this 2026 trial of 270 adults, 55% of participants scored in the normal range on the MoCA after six months. This figure describes the whole group and is not proof that the programs caused the change, since no participants received no intervention for comparison.
Want to Apply This Research?
- Track weekly brain training sessions completed, aiming for at least three sessions per week, and log the number of minutes spent in each session. Record daily servings of vegetables, fruits, legumes, whole grains, and nuts, since these are central to whole-food plant-based eating. If possible, schedule a cognitive screening such as the Montreal Cognitive Assessment with a healthcare provider every six months to track changes over time.
- Set a simple weekly goal, such as completing three 15-minute brain training sessions and adding one new plant-based meal each week. Use reminders to make these habits part of a daily routine, such as training in the morning and cooking a vegetable-based dinner in the evening. Encourage gradual changes rather than overhauling the entire diet at once, and choose a training program that feels manageable rather than the most advanced one available.
- Review progress monthly by looking at training consistency, dietary patterns, and any changes in daily memory or focus that you or a family member notice. Share these logs with a doctor at regular visits so they can help interpret changes. Keep track of how long healthy habits are maintained, since the study could not show whether benefits last beyond six months, and long-term tracking can help answer that question for you personally.
This article summarizes a single randomized trial and is for general information only. It is not medical advice. Mild cognitive impairment should be evaluated by a qualified healthcare provider, who can recommend appropriate care. Do not start, stop, or change any treatment, diet, or exercise program based on this article without speaking to your doctor, especially if you take medications or have other health conditions.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.