Alzheimer’s Disease—Yes, It’s Preventable!

By Dr. Mercola
An estimated 5.4 million Americans have Alzheimer's disease, a severe form of dementia,1 and hundreds of thousands more may suffer from an often misdiagnosed subtype called "hippocampal sparing" Alzheimer's, according to recent findings.

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"[Alzheimer's] is a preventable disease. It surprises me at my core that no one's talking about the fact that so many of these devastating neurological problems are, in fact, modifiable based upon lifestyle choices… What we've crystallized it down to now, in essence, is that diets that are high in sugar and carbohydrates, and similarly diets that are low in fat, are devastating to the brain.When you have a diet that has carbohydrates in it, you are paving the way for Alzheimer's disease. I want to be super clear about that. Dietary carbohydrates lead to Alzheimer's disease. It's a pretty profound statement, but it's empowering nonetheless when we realize that we control our diet. We control our choices, whether to favor fat or carbohydrates."

Alzheimer's Is Directly Related to Elevated Blood Sugar Levels 

A study published in the New England Journal of Medicine in August 2013 demonstrates that even mild elevation of blood sugar—a level of around 105 or 110—is associated with an elevated risk for dementia. Dr. Perlmutter believes it's very important for physicians to become cognizant of this link, and to stop downplaying the risks associated with even mildly elevated blood sugar. So what is an ideal fasting blood sugar level? Dr. Perlmutter suggests that anything over 92 or 93 is too high. He believes the ideal fasting blood sugar level is around 70-85, with 95 as the maximum. If your fasting blood sugar is over 95 mg/dl, it's definitely time to address your diet to lower it. If you're fat adapted, there's no reason to shun fasting blood sugar levels below 70, as your body is then able to tap into body fat as an energy source.

The Importance of Saturated Fats for Healthy Brain Function 

Our ancestral diet was very high in saturated fats and virtually void of non-vegetable carbohydrates. Today, not only do we eat tremendous amounts of carbohydrates, these carbs are refined and highly processed. In the last decade, we've also shifted over to genetically engineered grains and sugar (GMO sugar beets and corn). Adding insult to injury, for the past 60 years conventional medical authorities have also warned that saturated fats cause heart disease and should be severely restricted.

This inappropriate fat phobia has undoubtedly played a significant role in the dramatic rise in dementia and other neurological disorders, because your brain cannot function properly without fats! The type of fat you eat makes all the difference in the world, though. You want to avoid all trans fats or hydrogenated fats that have been modified in such a way to extend their longevity on the grocery store shelf. This includes margarine, vegetable oils, and various butter-like spreads. Sources of healthy fats to add to your diet include:

Coconuts and coconut oil (coconut oil actually shows promise as an effective Alzheimer's treatment in and of itself)

Other Dietary Considerations

Here's a summary run-down of diet-related strategies that will help optimize your brain function and prevent Alzheimer's: Avoid sugar and refined fructose. Ideally, you'll want to keep your sugar levels to a minimum and your total fructose below 25 grams per day, or as low as 15 grams per day if you have insulin/leptin resistance or any related disorders. Avoid gluten and casein (primarily wheat and pasteurized dairy, but not dairy fat, such as butter). Research shows that your blood-brain barrier is negatively affected by gluten. Gluten also makes your gut more permeable, which allows proteins to get into your bloodstream, where they don't belong. That then sensitizes your immune system and promotes inflammation and autoimmunity, both of which play a role in the development of Alzheimer's. Optimize your gut flora by regularly eating fermented foods or taking a high-potency and high-quality probiotic supplement. Increase consumption of all healthy fats, including animal-based omega-3. Health-promoting fats that your brain needs for optimal function are listed above. Also make sure you're getting enough animal-based omega-3 fats, such as krill oil. (I recommend avoiding most fish because, although fish is naturally high in omega-3, most fish are now severely contaminated with mercury.) High intake of the omega-3 fats EPA and DHA help by preventing cell damage caused by Alzheimer's disease, thereby slowing down its progression, and lowering your risk of developing the disorder. Reduce your overall calorie consumption, and/or intermittently fast. Ketones are mobilized when you replace carbs with coconut oil and other sources of healthy fats. As mentioned above intermittent fasting is a powerful tool to jumpstart your body into remembering how to burn fat and repair the inulin/leptin resistance that is also a primary contributing factor for Alzheimer's. To learn more, please see this previous article. Improve your magnesium levels. There is some exciting preliminary research strongly suggesting a decrease in Alzheimer's symptoms with increased levels of magnesium in the brain. Unfortunately, most magnesium supplements do not pass the blood brain levels, but a new one, magnesium threonate, appears to and holds some promise for the future for treating this condition and may be superior to other forms. Eat a nutritious diet, rich in folate. Vegetables, without question, are your best form of folate, and we should all eat plenty of fresh raw veggies every day. Avoid supplements like folic acid, which is the inferior synthetic version of folate.

General Lifestyle Guidelines for Alzheimer's Prevention

Besides diet, there are a number of other lifestyle factors that can contribute to or hinder neurological health. The following strategies are therefore also important for any Alzheimer's prevention plan: Exercise regularly. It's been suggested that exercise can trigger a change in the way the amyloid precursor protein is metabolized,11 thus, slowing down the onset and progression of Alzheimer's. Exercise also increases levels of the protein PGC-1alpha. Exercise also leads to hippocampus growth and memory improvement.12 I would strongly recommend reviewing the Peak Fitness Technique for my specific recommendations. Optimize your vitamin D levels with safe sun exposure.Strong links between low levels of vitamin D in Alzheimer's patients and poor outcomes on cognitive tests have been revealed. Researchers believe that optimal vitamin D levels may enhance the amount of important chemicals in your brain and protect brain cells by increasing the effectiveness of the glial cells in nursing damaged neurons back to health. Vitamin D may also exert some of its beneficial effects on Alzheimer's through its anti-inflammatory and immune-boosting properties. Sufficient vitamin D (50-70 ng/ml) is imperative for proper functioning of your immune system to combat inflammation that is also associated with Alzheimer's. Avoid and eliminate mercury from your body. Dental amalgam fillings, which are 50 percent mercury by weight, are one of the major sources of heavy metal toxicity, however you should be healthy prior to having them removed. Once you have adjusted to following the diet described in my optimized nutrition plan, you can follow the mercury detox protocol and then find a biological dentist to have your amalgams removed. Avoid and eliminate aluminum from your body. Sources of aluminum include antiperspirants, non-stick cookware, vaccine adjuvants, etc. For tips on how to detox aluminum, please see my article, "First Case Study to Show Direct Link between Alzheimer's and Aluminum Toxicity." Avoid flu vaccinations as most contain both mercury and aluminum, well-known neurotoxic and immunotoxic agents. Avoid anticholinergics and statin drugs. Drugs that block acetylcholine, a nervous system neurotransmitter, have been shown to increase your risk of dementia. These drugs include certain nighttime pain relievers, antihistamines, sleep aids, certain antidepressants, medications to control incontinence, and certain narcotic pain relievers. Statin drugs are particularly problematic because they suppress the synthesis of cholesterol, deplete your brain of coenzyme Q10 and neurotransmitter precursors, and prevent adequate delivery of essential fatty acids and fat-soluble antioxidants to your brain by inhibiting the production of the indispensable carrier biomolecule known as low-density lipoprotein. Challenge your mind daily. Mental stimulation, especially learning something new, such as learning to play an instrument or a new language, is associated with a decreased risk of Alzheimer's. Researchers suspect that mental challenge helps to build up your brain, making it less susceptible to the lesions associated with Alzheimer's disease.