Brain fog, memory lapses, and cognitive decline aren’t just inevitable parts of aging.
According to functional medicine expert Dr. Jin Sung, many of these symptoms stem from chronic inflammation triggered by everyday food choices—and one common culprit might be sitting in your pantry right now.
In a recent conversation with certified nutrition health coach Lilly, Dr. Sung revealed how gluten, stress, poor sleep, and sedentary habits silently damage brain health—sometimes decades before dementia is diagnosed.
The good news? Simple lifestyle changes can help protect your brain starting today.
Jump to:
- Gluten and Brain Inflammation: More Than Just Gut Issues
- Top Five Inflammatory Foods Harming Your Brain
- Four Pillars of Brain Protection
- Fasting for Brain Health: Who Should and Shouldn’t Try It
- How Long Until You Notice Results?
- What About Toxins, Heavy Metals, and EMFs?
- Biggest Mistakes People Make Optimizing Brain Health
- Practical Steps to Start Today
Gluten and Brain Inflammation: More Than Just Gut Issues
Gluten isn’t only a digestive concern. Dr. Sung explains that specific components of gluten can cross into the brain and trigger inflammatory reactions.
If you look at your foods and you see gluten in it, breads, pastas, or even whole wheat that has gluten in it. So, gluten is one of those inflammatory triggers.
One classic sign of gluten sensitivity is cerebellar dysfunction—problems with balance and coordination. Some people with gluten issues fail the same neurological tests given to intoxicated drivers.
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There’s even a condition called gluten ataxia, where gluten consumption directly impairs balance centers in the brain.
Why U.S. Gluten May Be Worse
Dr. Sung points out that gluten in the United States differs significantly from European varieties due to glyphosates and hybridization.
Many patients report tolerating bread in France without issues, yet experience brain fog and fatigue after eating similar products at home.
Top Five Inflammatory Foods Harming Your Brain
Dr. Sung identifies five major dietary triggers that promote inflammation and cognitive decline:
- Gluten – Found in breads, pastas, soy sauce, and “healthy” whole wheat products
- Dairy – Especially conventional milk and cheese; raw or goat dairy may be better tolerated
- Soy – Often hidden in processed foods
- Nightshades – Tomatoes, peppers, eggplants, and potatoes
- Lectins – Present in beans, grains, and certain vegetables
For patients with chronic health issues or autoimmune conditions, Dr. Sung recommends starting with an autoimmune paleo (AIP) diet, which eliminates all five inflammatory foods.
Testing Food Sensitivities the Right Way
Reintroducing foods requires patience. Dr. Sung advises adding one new food every three to five days to identify symptomatic reactions like bloating or brain fog.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
However, immunological responses can last 30 to 90 days. Eating trigger foods “just once a week” keeps inflammation perpetually active.
I get this from patients. “I was so good for a week and I had a little pizza.” Their immune reaction never goes away because they’re eating it once a week.
Four Pillars of Brain Protection
When asked what he would prioritize to prevent Alzheimer’s, Dr. Sung didn’t hesitate.
Today would be stress reduction, sleep, food, and then exercise. Those are the four things.
1. Stress Reduction: Cut Out Toxic Relationships
Chronic stress floods your body with cortisol, creating brain fog and impairing short-term memory, particularly in the hippocampus.
Dr. Sung urges patients to eliminate unnecessary stressors—even toxic friendships.
Reducing stress clears the mental “film” that clouds thinking, similar to putting on glasses for the first time.
2. Sleep: Activate Your Brain’s Cleaning System
Deep sleep triggers the glymphatic system, which flushes waste from the brain.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Optimize sleep by making your bedroom dark, cool, and quiet. Remove alarm clocks with glowing displays and avoid screens before bed.
Poor sleep also disrupts autophagy—the body’s natural process for clearing damaged cells.
3. Nutrition: Eliminate Inflammatory Triggers
Beyond avoiding the top five inflammatory foods, Dr. Sung emphasizes blood sugar regulation.
People with insulin resistance or diabetes struggle to fuel their brains with glucose efficiently. Switching to ketones through fasting or a ketogenic diet can dramatically improve cognitive function.
You make your brain utilize ketones rather than glucose for fuel. And for those individuals, it can be like turning on the light.
4. Exercise: Boost Oxygenation and Neural Connections
Movement stimulates neuroconnections and increases oxygen delivery to the brain.
Dr. Sung recommends high-intensity interval training and resistance training over walking alone.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- Interval training: One minute hard effort, 20 seconds rest, repeat
- Resistance training: Builds muscle mass critical for mitochondrial and hormonal health
- Balance exercises: Particularly beneficial for cerebellar function
Parkinson’s patients benefit from fast movements like boxing. Similar principles apply to preventing cognitive decline.
Fasting for Brain Health: Who Should and Shouldn’t Try It
Dr. Sung practices intermittent fasting personally, eating within a smaller window and doing a 24-hour fast weekly.
Given his family history of diabetes and hypertension, fasting helps him manage blood sugar and maintain metabolic health.
Prolonged fasting (24 to 72 hours) can trigger deeper autophagy and stimulate brain-derived neurotrophic factors (BDNF), which support brain health.
Who Should Avoid Fasting
Fasting isn’t for everyone. Hypoglycemics—people who get shaky or irritable between meals—can worsen their condition by fasting.
Others who should skip prolonged fasts include:
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
- People with gastritis or inflammatory stomach conditions
- Lean individuals doing heavy physical labor
- Anyone who crashes or feels worse after fasting
Understanding your body when not to do certain things is almost as important as trying to do something.
How Long Until You Notice Results?
Dr. Sung offers clear timelines for lifestyle changes:
- 7 to 10 days: Notice initial positive changes
- 30 days: Definite improvement or worsening (signals whether approach is working)
- 90 days: Turn the corner on chronic issues
- 6 months to 1 year: Full recovery from long-standing problems
If you’re not feeling better within 7 to 10 days, what you’re doing likely isn’t working.
What About Toxins, Heavy Metals, and EMFs?
Dr. Sung acknowledges that heavy metals, microplastics, pesticides, and even Wi-Fi can impact brain health.
However, he emphasizes that lifestyle factors come first. Addressing sleep, stress, nutrition, and exercise builds a strong foundation before tackling environmental toxins.
For individuals sensitive to electromagnetic frequencies, simple changes like hardwiring internet connections instead of using Wi-Fi can make a difference.
Biggest Mistakes People Make Optimizing Brain Health
Going to extremes causes more harm than good. Exercising until you crash or fasting when hypoglycemic stresses your system unnecessarily.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
Dr. Sung advises understanding your metabolic capacity—the threshold beyond which your body can’t recover.
Build slowly. Start with two of the four pillars—ideally sleep and stress reduction—then add nutrition and exercise.
Practical Steps to Start Today
Brain health doesn’t require expensive supplements or extreme protocols. Dr. Sung’s advice is refreshingly simple:
- Reduce stress: Cut toxic relationships, practice mindfulness
- Optimize sleep: Dark, cool room; no screens before bed
- Clean up diet: Eliminate or test gluten, dairy, soy, nightshades, lectins
- Move your body: High-intensity intervals and resistance training
These foundational changes protect your brain long before symptoms appear—because cognitive decline often starts decades before diagnosis.
As Lilly shared about her grandmother’s experience with dementia, losing cognitive function means losing everything: memories, speech, mobility, identity.
But dementia isn’t inevitable. Small, consistent lifestyle changes today can preserve mental clarity and independence for decades to come.
If you want something simple that actually works, this is one of the most effective tools I’ve used to build strength, conditioning, and endurance without needing a full gym setup.
- Full-body training with one weight using swings, squats, and presses
- Solid cast iron build that feels stable and lasts for years
- Comfortable grip that makes high-rep workouts easier to handle
