The Genetic Coach Podcast

Traumatic Brain Injury

In this episode of The Genetic Coach Podcast, we explore a topic that often gets reduced to "a knock to the head" but, for those who have lived it, represents a clear before and after — traumatic brain injury. Hosted by Di White, this episode features Natalie Gauger, a certified nutrition specialist based in Charleston, South Carolina, with a degree in biology and genetics and a master's in clinical nutrition from Sonoran University Health Sciences, whose passion for nutrigenomics is rooted in personal experience. At 17, Natalie sustained a severe concussion during a high school softball game — an injury that reshaped her cognition, her grades, her energy, and her understanding of what recovery actually looks like. In this conversation, she walks us through the symptoms that lingered long after the initial hit, the limited support available at the time, and the ADHD diagnosis that eventually helped her regain academic footing. More importantly, she reflects on what her current self — armed with her 3X4 Genetics report — would have done differently, from inflammation and histamine management to gut-brain axis support and targeted supplementation. From a high-impact inflammation pathway and elevated oxidative stress, to histamine overload and gut inflammation markers not typically addressed in concussion care, Natalie reveals how the 3X4 genetic blueprint could have transformed her recovery trajectory had it been available 14 years ago. Whether you are an athlete navigating concussion recovery, a parent whose child has suffered a head injury, a practitioner supporting clients through TBI, or simply curious about how deeply our genetics shape brain resilience, this episode offers a moving and practical look at why one-size-fits-all concussion care is leaving recovery outcomes on the table. Key talking points: * What a high school softball concussion taught one nutrition specialist about the long after-effects of TBI * Why the "pre-concussion and post-concussion" framing captures an experience that scans and CT imaging often miss * The limited support and information provided around TBI recovery a decade ago — and how much the landscape has changed * How Natalie's high-impact inflammation pathway and elevated oxidative stress could have guided a very different recovery protocol * The role of histamine overload, gut inflammation SNPs, and the gut-brain axis in post-concussion inflammation cascades * Why the cupcakes, fried foods, and high-histamine diet of Natalie's teen years worked directly against her genetic profile * How genetic insight into BDNF, neurotransmitters, and mood and behavior pathways can shape targeted recovery interventions * Practical nutrition, supplementation, and lifestyle shifts Natalie uses today — from SPMs and omega-3s to histamine-degrading foods like dill * Why box breathing, sound baths, and tech-free walks are core to her ongoing stress and inflammation management * How combining traditional medical care with nutrigenomics delivers the most complete picture of TBI recovery * Why a single genetic test becomes a lifelong reference point that supports recovery across decades and evolving health contexts

From Burnout to Breakthrough: Genetics in Practice

In this episode of The Genetic Coach Podcast, we move beyond theory and into practice, exploring what precision nutrition and functional health actually look like in the real world. Through two compelling case studies - one female, one male - we examine how genetic insights can unlock root causes that standard care often misses, and how targeted interventions can produce life-changing results. Hosted by Di White, this episode features Timothy Garrett, a registered dietitian nutritionist and integrative and functional nutrition certified practitioner specializing in personalized, root-cause approaches to health and performance. Tim walks us through two distinct client journeys - a woman in her 50s struggling with anxiety, brain fog, and stalled body composition, and a high-volume male lifestyle athlete battling post-exercise migraines, neurological fatigue, and slow recovery - revealing how the 3X4 Genetics report brought clarity where years of effort had fallen short. From methylation dysfunction and oxidative stress overload to phase 1 and 2 detox impairments and catecholamine clearance issues, Tim breaks down how genetic architecture shapes daily physiology, and how precisely targeted nutrition, supplementation, and lifestyle adjustments can restore balance where generalized advice never could. Whether you are a client curious about your own biology, a practitioner looking to deepen your toolkit, or simply someone who has been doing all the right things and still not feeling right, this episode offers powerful, evidence-grounded perspective on why understanding your genes can be the missing piece. Key talking points: * What functional and integrative nutrition looks like in practice and how it differs from conventional care * How MTHFR, MTR, MTRR, and PEMT variants disrupted methylation, neurotransmitter production, and stress regulation in a female client * The role of oxidative stress genes (MnSOD, NQO1, GSTP1) in mood, inflammation, and recovery * How a woman in her 50s achieved an 11% body composition shift after methylation and choline support — post-plateau * How GSTM1 deletion, COMT slow activity, and CYP1B1 variants compounded oxidative and detox burden in a high-volume male athlete * The gut-brain axis and how reducing systemic stress improved GI symptoms without direct gut intervention * Why self-supplementing without genetic and lab guidance can backfire — and what titrating correctly looks like * The long-term value of a single genetic test as a lifelong reference point for evolving health contexts

Hormones, Genetics, and Injury Risk in Athletes with Marina Shanafelt

In this episode of The Genetic Coach Podcast, we explore the powerful but often overlooked relationship between hormones, genetics, and injury risk in athletes. While hormones are frequently discussed in the context of reproduction, this conversation shifts the focus to how steroid hormones influence muscle strength, connective tissue integrity, bone resilience, recovery, and long-term performance in both female and male athletes. Hosted by Di White, this episode features 3X4 Genetics expert Marina Shanafelt, a certified nutrition specialist and nutrigenomics mentor, who breaks down how estrogen, progesterone, testosterone, DHEA, and cortisol interact with training load, stress, and energy availability to shape injury vulnerability across different life stages. Through real-world case studies, Marina explains how genetic insights can reveal hidden risks related to stress response, hormone metabolism, inflammation, bone health, and tissue repair, allowing athletes and clinicians to move from generalized advice to targeted, high-impact interventions. Whether you are a developing athlete, elite performer, coach, or clinician, this episode provides practical, science-backed insights into how understanding hormonal balance through a genetic lens can support smarter training, better recovery, and long-term athletic resilience. Key talking points: * The role of steroid hormones in muscle, tendon, ligament, and bone health * How hormonal shifts across puberty, menstrual cycles, and aging influence injury risk * Differences in injury patterns between female and male athletes * The impact of low energy availability and chronic stress on hormone balance and tissue resilience * How genetics reveal individual vulnerabilities in hormone metabolism and stress response * Case studies showing how DNA-guided nutrition and training adjustments reduce injury risk * Using genetic insights to personalize recovery, fueling, and long-term performance strategies

Celiac Disease and Sports Performance: What Athletes Need to Know

In this episode of The Genetic Coach Podcast, we explore the connection between celiac disease, genetics, and athletic performance, and why many athletes experience fatigue, injuries, and stalled progress without understanding the underlying cause. Hosted by Di White, this conversation features Registered Dietitian and nutrigenomics expert Nikki Grant, who explains how genetic predisposition to celiac disease can disrupt gut health, nutrient absorption, immune function, and recovery in athletes. Through clear explanations and real-world examples, the episode unpacks how specific HLA gene variants influence celiac risk, why symptoms are often overlooked or misdiagnosed in sport, and how genetic insights help athletes move beyond trial-and-error nutrition. From smarter carbohydrate choices to rebuilding gut integrity and managing training load, this discussion highlights how DNA-informed strategies support sustainable performance and long-term resilience. Whether you are an athlete, coach, or clinician, this episode offers practical, science-backed insights to help you train and recover in alignment with your biology. Key talking points: * What celiac disease is and why it matters in athletic performance * Genetic predisposition and the role of HLA-DQ2 and HLA-DQ8 variants * Common signs of undiagnosed celiac disease in athletes * Why celiac is often misdiagnosed as overtraining or IBS * The impact of gut health on energy, endurance, and recovery * Nutrition strategies for athletes with celiac risk or diagnosis * Using genetic insights to support long-term performance and resilience

Inside Elite Beach Volleyball: Evan Cory and Sarah Amidon on Genetics, Nutrition & Recovery

In this exciting new episode of The Genetic Coach Podcast, we delve into the elite world of Pro Beach Volleyball Player and FIVB medalist, Evan Cory, and Sports Genomics Dietitian Sarah Amidon of Root & Fruit Nutrition. Hosted by Di White, they reveal how personalized genetic insights have transformed Evan's approach to recovery, inflammation, nutrition, and optimized performance as a professional athlete in the ultra-competitive realm of Elite Beach Volleyball.  Whether you're a competitive athlete or simply intrigued by the future of genetics in sports performance, this episode is filled with practical and inspiring insights on data-driven strategies, mental resilience, and recovery science that can reshape your athletic journey. Key talking points: Introduction to Evan Cory: FIVB medalist and professional beach volleyball athlete navigating a demanding global circuit. Genetics in Sport: How personalized genetic testing revealed Evan's heightened inflammatory risk and shaped his recovery strategies. Nutrition Evolution: Transitioning from generic nutrition to a tailored, DNA-informed anti-inflammatory diet, including the role of gluten sensitivity, omega-3s, sulforaphane, and timing. Recovery as a Competitive Advantage: Why understanding individual genetic pathways can elevate recovery, prevent injury, and improve adaptation. The Role of Mindset in Elite Sport: Insights on mental strategies, mentorship, and the psychological intensity of solo/team competition in high-stakes environments. Wearables & Data Synergy: Integrating genetic data with tools like WHOOP and Oura Ring to contextualize performance metrics. Challenges of Global Travel: Balancing performance nutrition with regional food risks; strategies for packing smart and supplementing effectively.   Team Collaboration in Genomic Sports Medicine: How dietitians, coaches, and strength professionals can use DNA data to personalize training. The Future of Performance & Prevention: Using genomics to reduce overtraining, optimize NIL investment outcomes, and prevent costly injuries.