By Next Biosciences

29 September 2026

Why Brain Health Deserves the Same Attention as Fitness

Most people put real effort into looking after their heart, their joints, or their waistline, but the brain often gets overlooked until something feels off. Yet cognitive health is central to health span, the number of years you spend not just alive, but sharp, independent, and engaged with the people and things you care about.

Sleep, stress, toxin exposure, and exercise all shape how well your brain functions as you age. So does your genetic makeup. Understanding which genes you carry doesn't just explain why memory or focus might be harder for you than for someone else; it opens the door to targeted, personalised interventions rather than generic advice.

The Genes Behind Memory, Focus and Mental Clarity

Methylation and Brain Chemistry

Genes such as MTHFR and MTR affect how efficiently your body processes folate, a nutrient central to methylation and to producing neurotransmitters like dopamine and serotonin. The COMT gene, meanwhile, influences how you break down dopamine and stress hormones, which plays into focus, memory retention, and how your brain handles pressure.

People with certain variants in these genes may have a higher requirement for nutrients like methylated folate, vitamin B12, vitamin B6, phosphatidylcholine, magnesium, and zinc, all of which support healthy methylation and neurotransmitter balance.

Inflammation and Oxidative Stress

Genes including IL-6R, ENOS, MnSOD, and NQO1 regulate inflammation and how well your body manages oxidative stress. Variants here can mean a greater tendency toward neuroinflammation, a key contributor to cognitive decline over time.

Compounds like omega-3 fatty acids, curcumin, ginseng, ginkgo biloba, sulforaphane, and bacopa monnieri are commonly used to support the brain's anti-inflammatory and detoxification processes.

Neuroplasticity: how well your brain adapts and repairs

  • BDNF codes for a protein essential to forming new neural connections and keeping them flexible. Variants here affect how much of this protein your body produces naturally.

  • APOE plays a central role in lipid metabolism and is one of the most studied genes in cognitive ageing. Its three common variants (ε2, ε3, ε4) carry different implications for long-term brain health, and knowing yours can inform meaningful lifestyle adjustments.

  • TOMM40 affects mitochondrial function and, depending on the variant, can either compound or reduce the cognitive risk associated with the APOE ε4 variant.

Nutrients and compounds linked to supporting these pathways include maca and lion's mane (neural growth), DHA, and phosphatidylserine (neuronal structure and function), CoQ10 and alpha-lipoic acid (mitochondrial energy metabolism), and vitamin D (BDNF support).

From Genetic Insight to a Practical Plan

Knowing you carry a particular gene variant is only useful if it changes what you actually do. This is where nootropics, substances that support memory, learning, processing speed, or protection against inflammation and toxins, come in. Rather than guessing which one might help, genetic insight lets you prioritise the ones most relevant to your own biology.

A genetics-informed approach to brain health typically includes:

  • Targeted nutrient support. Addressing specific needs, such as extra B vitamins for methylation gene variants, rather than a blanket multivitamin approach.

  • An anti-inflammatory diet. Rich in omega-3s and antioxidant-dense foods, especially relevant if you carry inflammation-related gene variants.

  • Consistent lifestyle fundamentals. Quality sleep, regular movement, sunlight exposure, and a fibre-rich diet all support the neuroplasticity genes discussed above.

  • Considered supplementation. Always in consultation with a healthcare provider, since nootropics and targeted nutrients work best as part of a personalised plan, not a one-size-fits-all stack.

Why Test Your Genes for Brain Health?

This is exactly the kind of personalisation a DNA -based test is built for. The 3X4 Genetics test, available in South Africa through Next Biosciences, analyses 157 genes linked to nutrient metabolism, hormones, cardiovascular health, and brain health, giving you a genetic profile that goes well beyond generic wellness advice.

Rather than trying every nootropic and supplement on the market, you get a personalised report showing which genetic factors are most relevant to you, translated into a practical, prioritised action plan by a practitioner. The process is straightforward: order the test, complete a cheek swab at home, and review your results with a practitioner who can help turn the science into a realistic day-to-day plan.

Learn more about 3X4 Genetics nutrigenomic testing with Next Biosciences

 

Frequently Asked Questions

  1. Can genetics really affect memory and brain health? Yes. Genes involved in methylation, inflammation regulation, and nerve cell repair all influence cognitive function and how your brain ages over time.

  2. What genes are linked to cognitive decline? Genes such as APOE, TOMM40, and BDNF are strongly linked to neuroplasticity and cognitive ageing, while MTHFR, COMT, IL-6R, ENOS, MnSOD, and NQO1 influence methylation and neuroinflammation, both of which affect long-term brain health.

  3. What are nootropics? Nootropics are substances that support cognitive function, whether by improving memory and learning, increasing processing speed, or protecting the brain from inflammation and toxins.

  4. Can a DNA test tell me which nootropics or supplements I need? A genetic test can't prescribe supplements directly, but it can highlight which biological pathways, such as methylation or inflammation, are most relevant to you, helping a practitioner recommend more targeted options.

  5. Where can I get 3X4 Genetics testing in South Africa? Next Biosciences offers 3X4 Genetics nutrigenomic testing in South Africa, with results delivered in 3 to 4 weeks and interpreted alongside a practitioner.

This article is for educational purposes and is not a substitute for professional medical advice. Speak to your doctor or a qualified practitioner before starting any new supplement or nootropic.

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