Why Your Memory Will Love a Keto Diet

Imagine if the secret to preventing memory loss and protecting your brain lay not in a pill, but on your plate. Scientists have long sought ways to stave off cognitive decline, but new research suggests that the key to maintaining mental sharpness may be hidden in the foods we eat. A groundbreaking study has uncovered a fascinating link between diet, gut health, and brain function—one that could change the way we think about aging and neurodegenerative diseases like Alzheimer’s. Could a shift in dietary habits hold the power to protect your mind for years to come? Let’s unravel this compelling discovery.

Key Takeaways

• Keto Diet and Brain Fuel: The ketogenic diet, by reducing carbohydrate intake and increasing healthy fats, promotes ketone production, which serves as an efficient energy source for the brain, potentially reducing the risk of mild cognitive impairment (MCI) and Alzheimer’s disease.

• Gut-Brain Connection: New research suggests that the microbiome in the gut plays a crucial role in brain health, and adopting a Mediterranean-style ketogenic diet (MMKD) can help restore microbial balance, reducing harmful fungi linked to cognitive decline.

• Inflammation Reduction: The MMKD not only enhances gut diversity but also helps suppress the growth of inflammation-causing bacteria and fungi, such as Candida, which have been linked to Alzheimer’s disease and other inflammatory conditions.

Unlocking Brain Health: The Role of Fats, Carbs, and Gut Bacteria

If you’re a loyal follower of Brain Health Breakthroughs, there’s a good chance you’ve read about the benefits of a ketogenic diet in one of our articles.

Researchers have found this type of diet may help prevent mild cognitive impairment, which can lead to Alzheimer’s disease. Recently, researchers made another discovery that reveals new details of how diet can influence brain health.

Let’s delve into their findings, as well as discuss what this keto diet entails. According to the Alzheimer’s Association, 15 to 20 percent of people over 65 experience mild cognitive impairment (MCI), or a decline in memory and ability to think and focus clearly.¹ Now, medical experts don’t categorize MCI as a form of dementia, as these people can function fairly well and live independently. However, MCI is associated with a higher risk of Alzheimer’s disease later in life.² Many scientists believe if you can delay or prevent MCI, then you have a good chance of delaying or preventing Alzheimer’s disease.

That’s where the keto diet comes in...

What Does the Keto Diet Have to Do with Memory Loss?

Simply put, a keto diet involves drastically reducing carbohydrate intake and replacing it with fat. This reduction in carbohydrates puts your body into a metabolic state called ketosis. As a result, your body begins burning fats for fuel instead of carbohydrates. As you probably already know, carbohydrates are metabolized into glucose or blood sugar. In turn, this leads to a host of troublesome health issues, including everything from diabetes to dementia.

On the flip side, fats are an alternate way of providing your body with an energy source, without spiking blood sugar.

Why is this beneficial? When your body is in ketosis it becomes incredibly efficient at burning fat for energy. Importantly, it also turns fat into ketones in the liver, which can supply energy to the brain.³ Recently, scientists discovered yet another benefit of the keto diet that impacts brain health.

Preventing Dementia Might Begin in the Gut

As we’ve reported in this newsletter before, recent research has revealed a strong link between overall brain health and overall gut health. In particular, studies suggest a link between certain bacterial communities living in the gut and neurological disorders, including MCI, dementia, and Alzheimer’s disease.

So, it’s not a surprise that scientists at the Wake Forest School of Medicine explored how modifying one’s diet may influence the microbial communities as a whole in the gut. These microbial communities include bacteria, fungi, and other microbes that live in the human intestinal tract.

Researchers studied a group of 17 older adults whose average age was 65. Eleven of the participants had MCI and six had no cognitive issues at the beginning of the study. Interestingly, the gut bacteria of those with MCI had a distinctive “signature,” featuring certain types of fungi, not found in their cognitively normal-functioning peers. This discovery was a scientific “first” since MCI has only been associated with a high-risk profile of Alzheimer’s biomarkers in cerebrospinal fluid. But things were about to get even more interesting.

Brain Benefits of Specific Diets

Researchers turned to a diet they called a Mediterranean-style keto diet (MMKD) which provided high levels of healthy, low-saturated fats featuring lean meats, fish, and olive oil. This diet was also low carbohydrate with carbohydrates making up less than ten percent of total caloric intake. That’s very low!

For six weeks, the researchers assigned the adults to eat either an MMKD that’s high in healthy fats or the American Heart Association diet, which is low in fat and high in carbohydrates. Despite participants with MCI initially having less fungal diversity in their guts, after eating an MMKD their healthy gut diversity was restored. “Although we do not fully understand how these fungi contribute to Alzheimer’s disease, this is the first study of its kind to reveal their role in our mental health, which we hope will ignite thinking in the scientific community to develop a better understanding of them connecting Alzheimer’s disease,” says principal investigator HariomYadav, Ph.D. “It also indicates that dietary habits such as eating a ketogenic diet can reduce harmful fungi in the gut, which might help in reducing Alzheimer’s disease processes in the brain,” he explains.

Fights Inflammation

Some types of bacteria produce substances known to suppress the growth of certain fungi. The authors say that this may explain why eating an MMKD curbs the growth of fungi called Candida in the guts of participants with MCI. It’s important to note that Candida has been linked to a range of inflammatory diseases of the gut, not to mention Alzheimer’s disease. Studies show that inflammation plays an important role in Alzheimer’s disease. 4 and researchers believe that because a keto diet thwarts Candida and reduces inflammation, it may help reduce the risk of Alzheimer’s. Prof. Yadav and his team published their findings in the journal EbioMedicine.⁵

My Takeaway

Prof. Yadav’s investigation was a small pilot study with limitations that the authors acknowledge. In particular, the small sample size made it impossible to account for other variables that can increase one’s Alzheimer’s risk. It’s also important to clarify that the MMKD is not a standard keto diet. The folks in this study ate a keto diet low in saturated fat and high in healthy oils. They didn’t gorge themselves on burgers and steaks like many people who follow the keto diet choose to do.

In my opinion, these healthy, lean fats and oils are what made all the difference in the positive results in gut and brain health. Regardless, I’m eager to see more research on the keto diet and brain connection. I’m a firm believer that any diet that can balance the gut microbiome and fight inflammation at the same time will be a game changer for anyone who is at risk for MCI or Alzheimer’s disease, not to mention a host of other health problems like cancer.

For more information on the cognitive benefits of a keto diet, read https://www.awakeningfromalzheimers.com/reap-the-cognitive-benefits-of-ketones-without-the-full-ketogenic-diet/

Summary

Scientists have long studied ways to prevent cognitive decline, and new research has uncovered a compelling connection between diet, gut health, and brain function. The study examined the effects of a Mediterranean-style ketogenic diet (MMKD) on older adults, revealing that those who followed this diet experienced improved gut microbial diversity and a reduction in harmful fungi linked to Alzheimer’s disease. The keto diet’s ability to promote ketone production and reduce inflammation may be key to lowering the risk of mild cognitive impairment (MCI) and, ultimately, Alzheimer’s. These findings emphasize the importance of dietary choices in maintaining long-term brain health and offer hope for a future where memory loss can be mitigated through nutrition.

Frequently Asked Questions

What is the ketogenic diet, and how does it work?

The ketogenic diet is a low-carb, high-fat eating plan that puts the body into ketosis, a state where fat is burned for energy instead of carbohydrates, producing ketones that fuel the brain efficiently.

How does the keto diet impact brain health?

Research suggests that ketones provide an alternative energy source for the brain, helping to reduce inflammation, improve gut health, and potentially lower the risk of cognitive decline and Alzheimer’s disease.

What is the connection between gut health and cognitive function?

The gut microbiome plays a crucial role in overall health, including brain function. An imbalance in gut bacteria has been linked to neurological disorders, while a balanced microbiome may support cognitive health.

Is the Mediterranean-style ketogenic diet different from a standard keto diet?

Yes, the MMKD emphasizes healthy, unsaturated fats such as olive oil, lean meats, and fish, whereas the standard keto diet can sometimes include high amounts of saturated fats from processed meats and dairy.

Can diet alone prevent Alzheimer’s disease?

While diet plays a significant role in brain health, other factors such as genetics, lifestyle, exercise, and mental stimulation also contribute to reducing the risk of Alzheimer’s and cognitive decline.