Protect Your Brain, Extend Your Life: 7 Mistakes to Avoid for Better Cognitive Health with Dr Tommy Wood #681
Dr. Tommy Wood, Assistant Professor of Paediatrics and Neuroscience, discusses seven common mistakes in brain health and longevity. He covers mindset, social connection, blood pressure, early blood testing (homocysteine), effective supplements, oral health, and navigating modern toxic loads like microplastics and air pollution, emphasizing that it's never too late to start making positive changes.
Deep Dive Analysis
21 Topic Outline
Introduction to Brain Health and Longevity Mistakes
Mistake 1: Impact of Perception on Aging
Mindset and Physiological Stress Response
Mistake 2: Neglecting Social Connection for Health
The 3S Model for Brain Function
Social Isolation as a Form of Stress
Mistake 3: Ignoring High Blood Pressure Risks
Resting Heart Rate and Overall Health
Mistake 4: Delaying Blood Testing Until Sickness
The Importance of Homocysteine and B Vitamins
Omega-3 Status and Nutrient Interactions
Mistake 5: Dismissing All Supplements
Benefits of Multivitamins and Creatine for Brain
Mistake 6: Neglecting Oral Health and Dementia Risk
Xylitol Gum and Oral Microbiome Benefits
Mistake 7: Addressing Modern Toxic Load
Microplastics: Exposure and Mitigation Strategies
Water Filtration for Health
Air Pollution: Outdoor, Indoor, and Mitigation
The Power of Sweating for Detoxification
Final Empowering Message: Never Too Late to Start
9 Key Concepts
Developmental Theory of Aging
Aging is a continuation of developmental processes, where a decline in function occurs when the body stops receiving inputs that maintain function.
General Adaptation Syndrome
Hans Selye's term for the body's non-specific response to stress, signaling that adaptation is required, which can be beneficial for growth and learning.
Stress is Enhancing Mindset
The belief that stress can improve performance and facilitate adaptation, which can physiologically alter the body's response to stress by increasing beneficial hormones like DHEA.
Survival of the Kindest
An evolutionary theory, proposed by Dacher Keltner based on Darwin's later work, suggesting that human groups that are most empathetic and caring for each other are more likely to survive.
3S Model
A framework for understanding brain health where Stimulus (how we use our brains) drives adaptation, Supply (blood, energy, nutrients) fuels it, and Support (rest, sleep, avoiding toxins) enables recovery and growth.
Homocysteine
A blood marker related to methylation and B vitamin status (B12, folate, B6, riboflavin), where elevated levels are associated with increased risk of cardiovascular disease and accelerated brain atrophy and cognitive decline.
MTHFR Polymorphism
A common genetic variation affecting an enzyme (methylene tetrahydrofolate reductase) involved in the methylation pathway, which can influence homocysteine levels but is largely manageable with adequate riboflavin intake.
Microplastics
Tiny plastic particles resulting from the breakdown of larger plastics, which humans are exposed to primarily through food and drink, and whose health impacts are still being researched but are linked to certain plasticizers.
PM 2.5
Fine particulate matter (2.5 micrometers or less in diameter) in the air, often from cars and roads, which is frequently studied and associated with increased risk of heart attacks and dementia.
12 Questions Answered
A positive perception of aging is associated with living, on average, seven and a half years longer, likely because it encourages positive engagement with the world and influences physiology.
Social connection is a core biological requirement that promotes health by activating the vagal nerve, improving heart rate variability, decreasing stress responses, and maintaining brain structure and function, particularly in areas responsible for complex cognition.
High blood pressure is a critical, modifiable risk factor for the majority of dementias (Alzheimer's and vascular dementia), and reducing systolic blood pressure by about 10 points can significantly lower dementia risk.
Early blood testing allows you to track key metrics like HbA1c and homocysteine over time, identifying subtle shifts towards disease states and enabling early intervention to prevent chronic conditions and cognitive decline.
Homocysteine is a blood marker linked to B vitamin status; elevated levels are associated with a higher risk of cardiovascular disease, dementia, more rapid brain atrophy, and faster cognitive decline.
Yes, a basic multivitamin (e.g., 100% RDA of essential vitamins) has been shown in studies like the Cosmos trial to significantly reduce brain aging and improve cognitive function, making brains act as if they are two years younger.
Creatine is incredibly safe and may benefit the brain, particularly in cognitively degraded states, improving memory in older people, aiding recovery after traumatic brain injury, and maintaining cognitive function during sleep deprivation, as well as potentially improving depression symptoms.
Poor oral health, specifically gum disease, is linked to increased dementia risk because bacteria from the mouth can enter the bloodstream and brain, triggering systemic inflammation and potentially contributing to the formation of amyloid plaques.
While initial estimates of microplastic consumption were overblown, plasticizers are linked to negative health effects; minimize exposure by reducing canned foods, storing food in glass, using non-plastic utensils, and avoiding plastic bottles where possible.
While tap water is generally safe, filtering can reduce exposure to contaminants like lead, PFAS, and phthalates, offering a low-risk, potentially beneficial intervention for long-term health.
Both outdoor (e.g., PM 2.5) and indoor air pollution are linked to increased dementia risk; maintaining good B vitamin status can mitigate some risk, and using air purifiers in frequently used rooms can significantly reduce exposure and improve health markers like blood pressure.
No, it is never too late; studies show that individuals in their 60s, 70s, and 80s who start exercise, dietary changes, cognitive training, or improve sleep can still see significant benefits in brain health.
12 Actionable Insights
1. Cultivate a Positive Aging Mindset
View aging as a process that brings wisdom and emotional intelligence, rather than something to fight, as a positive outlook is linked to living longer and better engagement with the world.
2. Prioritize Social Connection
Actively engage with others, share meals, and participate in group activities, as social interaction is a fundamental biological need that promotes brain health, reduces stress, and is a strong predictor of well-being.
3. Monitor Blood Pressure Regularly
Get your blood pressure checked and monitor it at home (2-3 times daily) to keep it below 120/80, as high blood pressure is a critical, modifiable risk factor for dementia.
4. Track Key Blood Markers Early
Don’t wait until you’re sick; get baseline blood tests for markers like homocysteine and HbA1c, and track changes over time to intervene early and prevent chronic disease and cognitive decline.
5. Ensure Adequate B Vitamin & Omega-3 Status
If homocysteine is elevated (ideally below 10, definitely below 13), supplement with B vitamins (folate, B12, B6, riboflavin) and ensure sufficient omega-3 intake, as these nutrients synergistically reduce brain atrophy and cognitive decline.
6. Consider a Basic Multivitamin
Take a simple multivitamin (e.g., 100% RDA of basic vitamins) daily, as studies show it can significantly reduce brain aging and improve cognitive function, especially in older adults.
7. Address Oral Health Proactively
Maintain good oral hygiene and treat gum disease promptly, as bacteria from gum disease can enter the bloodstream and brain, increasing the risk of cardiovascular disease and dementia.
8. Minimize Plastic Exposure
Reduce consumption of canned foods, store food in glass instead of plastic, use non-plastic utensils, and buy loose produce to lower exposure to plasticizers linked to cognitive and heart issues.
9. Filter Drinking Water
Consider using a water filter (in-fridge, jug, or under-sink) to reduce exposure to contaminants like lead, PFAS, and phthalates, remembering to replace filters regularly.
10. Improve Indoor Air Quality
Use an air purifier in rooms where you spend significant time, especially if you have high exposure to outdoor air pollution (e.g., near main roads or during wildfires), as this can reduce blood pressure and other health risks.
11. Engage in Regular Sweating
Incorporate activities that make you sweat, such as exercise or sauna use, as sweating is a detoxification pathway that helps excrete unwanted compounds from the body.
12. Learn New Skills Consistently
Give your brain a reason to grow and adapt by learning new things like languages, music, dance, or sports, as this stimulation is crucial for maintaining cognitive function throughout life.
8 Key Quotes
It's never too late to start thinking about dementia prevention.
Dr. Tommy Wood
If we chase longevity but lose our connection to others along the way, well, maybe we've missed the entire point.
Dr. Rangan Chatterjee
Stress is useful. It's your body's signal to adapt to some change.
Dr. Tommy Wood
The group of humans that were most sympathetic... that looked after each other the most, that cared for each other the most, actually, they would be the ones that would survive.
Dr. Tommy Wood
The creation of health is a little bit different from the diagnosis and treatment of disease.
Dr. Rangan Chatterjee
Nutrients don't act one at a time.
Dr. Tommy Wood
If you believe something's helping you, it probably will.
Dr. Rangan Chatterjee
However you achieve that sweating, I think matters a lot less.
Dr. Tommy Wood
3 Protocols
Blood Pressure Monitoring Protocol
Dr. Tommy Wood- Get a home blood pressure monitor.
- Take your blood pressure 2-3 times a day (e.g., morning, afternoon).
- Track your readings over time to get a better picture of your average blood pressure.
- Aim to keep your blood pressure below 120/80.
Homocysteine Reduction Protocol
Dr. Tommy Wood- Measure your homocysteine level (ideally aim for below 10, definitely below 13).
- Ensure adequate intake of B vitamins (B12, folate, B6, riboflavin) through diet or supplementation.
- Ensure adequate omega-3 status, as B vitamins are effective only with sufficient omega-3s.
Minimizing Plastic Exposure Protocol
Dr. Tommy Wood- Reduce consumption of canned foods.
- Reduce storage of foods in plastic containers; use glass alternatives.
- Reduce use of plastic utensils; switch to metal or wooden options.
- Minimize buying foods pre-packaged in plastic; opt for loose produce.
- Drink fewer beverages from plastic bottles or cans.