Key Takeaways

  • Stop guessing with brain supplements. Dr. Tommy Wood insists that generic nutrient intake is often useless; efficacy skyrockets only when you address proven deficiencies identified through testing.
  • Your energy intake directly impacts brain volume and function. Both chronic caloric excess (leading to metabolic disease) and severe restriction can shrink your brain, impacting long-term cognitive health.
  • Specific nutrients like Vitamin D, iron, omega-3 fatty acids, and B vitamins (B12, folate, B6, riboflavin) have the strongest evidence for supporting cognitive function and reducing dementia risk.
  • Nutrient interactions matter more than you think. Wood highlights that B vitamin supplementation to lower homocysteine, a dementia risk factor, only works if your omega-3 levels are also adequate. “There are now at least three randomized control trials that have shown that omega-3 status and B vitamin status interact and they're dependent on one another,” Wood explains.
  • The core insight for ambitious builders is Wood's Personalized Nutritional Strategy for Brain Health: test your levels, then target your intake.

The Personalized Nutritional Strategy for Brain Health

This framework, shared by Dr. Tommy Wood, cuts through the noise of generic health advice, pushing for a data-driven approach to cognitive longevity.

  • 1. Optimize Energy Availability: Maintain a balanced energy intake – neither too low (chronic caloric restriction can decrease brain volume) nor too high (chronic caloric excess linked to metabolic disease and smaller brain volume). Aim for a state that supports overall physical and metabolic health, which in turn benefits cognitive health.
  • 2. Ensure Adequate Nutrient Intake (Test Your Levels): Prioritize obtaining sufficient amounts of critical nutrients known to support cognitive function and reduce dementia risk. The most evidence-backed ones include: Vitamin D, Iron, Omega-3 Fatty Acids, and B vitamins involved in methylation (particularly B12 and Folate, also B6 and Riboflavin). Other beneficial nutrients include antioxidant polyphenols (from berries, coffee, tea, chocolate), carotenoids (orange, yellow, red foods, astaxanthin), magnesium, zinc, choline, and ethanolamine.
  • 3. Targeted Supplementation Based on Deficiency: If you have access, test your levels of key nutrients (Vitamin D, Iron, Omega-3 index, Homocysteine for B vitamin status). Supplementation is most effective when addressing a documented deficiency or insufficiency, as opposed to broad, untargeted use. For instance, B vitamin supplementation to lower homocysteine is only beneficial if omega-3 levels are also adequate.
  • 4. Emphasize Whole, Nutrient-Dense Dietary Patterns: Adhere to a whole-foods-based dietary pattern similar to the Mediterranean or MIND diet (seafood, vegetables, berries, whole grains, quality fats). The overall context of diet quality and nutrient density is more important than focusing on single foods or restricting specific food groups. These diets are associated with slower cognitive decline and lower dementia risk.

When This Works (and When It Doesn't)

This framework shines for founders and builders aiming for peak cognitive function and long-term brain health, especially in their 20s and 30s. It provides a personalized, proactive approach to ward off cognitive decline and dementia. It's particularly powerful for those who suspect their demanding lifestyles or current diets might be leaving them deficient in key areas. The emphasis on testing ensures you're not wasting money or effort on supplements your body doesn't need, or worse, taking supplements that are ineffective due to other unaddressed deficiencies.

However, this strategy isn't a quick fix for acute neurological conditions, nor is it a substitute for medical treatment of existing diseases. It also requires access to diagnostic testing and, ideally, guidance from a healthcare professional to interpret results and create a tailored plan. It implicitly assumes a baseline commitment to a healthy lifestyle; merely taking a few targeted supplements won't outweigh a fundamentally poor diet or lack of sleep.

What to Do With This

If you're a founder pushing hard, battling occasional brain fog, or simply want to future-proof your most important asset, here's your immediate action item: schedule blood tests this week. Specifically ask your doctor for Vitamin D levels, hemoglobin and iron studies, an Omega-3 Index, and homocysteine levels. These tests, as Dr. Wood recommends, will give you the data needed to understand your body's specific needs. Once you have the results, use Wood's framework. For example, if your homocysteine is high but your Omega-3 Index is low, prioritize quality omega-3 sources (like fatty fish) and discuss targeted omega-3 supplementation before expecting B vitamins alone to solve the problem. Beyond supplements, assess your daily energy intake and aim for a whole-foods-based diet like the MIND or Mediterranean patterns – consistent, nutrient-dense fuel is non-negotiable for a high-performing brain.