Misinformation in nutrition is rampant. From demonizing red meat to hyping plant-based diets, conflicting advice has left many people confused about what’s truly evidence-based. In this episode, I am joined by Dr. Bradley Johnston, an expert in evidence-based nutrition and public health policies, to separate fact from fiction. With nearly 200 peer-reviewed publications, Dr. Johnston has challenged conventional wisdom—including recommendations from major organizations like the World Health Organization. He shares how evidence-based practices should guide our dietary choices, the importance of systematic reviews and meta-analyses, and how cognitive biases influence the research we trust.

Key Points:

• How evidence-based guidelines are formed—and why they sometimes change
• The three pillars of evidence-based practice and why patient values matter
• Why most nutrition studies aren’t as strong as we think—and how to critically evaluate them
• What the best available research actually says about dietary patterns for longevity
• The role of AI in research and whether it’s a help or hindrance to scientific rigor

If you’ve ever questioned dietary guidelines, nutrition headlines, or conflicting health advice, this episode is a must-listen. Get ready to rethink everything you thought you knew about nutrition.

Who is Dr. Bradley Johnston?

Dr. Bradley Johnston is an Associate Professor at Texas A&M University, specializing in evidence-based nutrition, and the methodology of patient-reported outcomes, randomized clinical trials, systematic reviews, and clinical and public health practice guidelines.

With a PhD in experimental medicine from the University of Alberta and post-doctoral training in evidence-based practice, epidemiology and biostatistics from Oxford and McMaster University, his research focuses on advancing human health research methodology to improve clinical and dietary practice recommendations and public health policies. He co-leads EvidenceBasedNutrition.org and NutriRECS, develops nutrition education resources (e.g. Nutrition Users’ Guides), and currently serves as Co-Chair of the Canadian Pediatric Obesity Management Guidelines, ensuring clinical and public health guidelines are backed and transparently supported by the best available evidence, including end user values and preferences, absolute estimates of effect and the certainty of evidence for estimates of effect. His overall aim is to empower patients, clients and members of the public to make fully-informed health care decisions based on the central tenets of evidence-based practice and policy.

This episode is brought to you by:

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Find Dr. Bradley Johnston at:

• Evidence Based Nutrition - https://www.evidencebasednutrition.org
• Nutrition Users' Guides -https://www.evidencebasednutrition.org/nutrition-user-guides
• Texas A&M University -

In this episode, I sit down with Dr. Kristy Hamilton, a board-certified plastic surgeon, to explore the latest advancements in aesthetic medicine, the impact of social media on beauty standards, and the reality of breast implant illness. Dr. Hamilton shares her expert insights on facial rejuvenation, fat transfer, the safety of fillers, and new biostimulators while debunking common myths around plastic surgery. We also dive deep into the controversial rise of explant surgeries, the latest data on BII, and how surgical and non-surgical options can help individuals feel more confident in their skin. From the influence of celebrity procedures to the evolution of breast implants, this conversation is packed with science-backed insights, expert advice, and practical takeaways for those considering aesthetic procedures.

Key Points:

• The truth behind plastic surgery and celebrity transformations
• What can and can’t be fixed through diet, exercise, and non-surgical treatments
• Breast Implant Illness: What the latest research reveals
• The risks of capsulectomy and explant regret
• The role of fillers, biostimulators, and fat transfer in facial rejuvenation
• How to approach facelifts and natural aesthetic treatments
• Best skincare practices for long-term anti-aging

Who is Dr. Kristy Hamilton?

Kristy Hamilton, MD, FACS is a plastic and reconstructive surgeon in Houston, Texas who specializes in aesthetic surgery of the face, breast, and body. An artist and a scientist, Dr. Hamilton blends form and function with an artistic eye to achieve beautiful, natural results. She understands patients’ individual needs and applies her surgical skill with meticulous detail, customized to each patient’s anatomy. Her patients’ well-being is her utmost concern, and she is well known for her compassionate care.

Dr. Hamilton offers the full range of bespoke aesthetic plastic surgery including rhinoplasty, eyelid surgery, facelifts and facial rejuvenation, necklifts, fat transfer, chin surgery, breast augmentation and lifts, body contouring and liposuction, as well as reconstructive facial and breast surgery.

This episode is brought to you by:

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• Timeline - Code DRLYON for 10% OFF - https://timelinenutrition.com/DRLYON

Find Dr. Kristy Hamilton at:

• Website: https://www.drkristyhamilton.com/
• Instagram: https://www.instagram.com/drkristyhamilton/
• LinkedIn:

Today, I welcome Dr. Donald Layman back to The Dr. Gabrielle Lyon Show for a deep dive into his decades of protein research, the flaws in dietary guidelines, and the evolving landscape of nutrition. Together, we explore the real reasons behind the obesity epidemic, why decades of dietary advice have led us astray, and how we can reclaim metabolic health through high-quality protein intake. Dr. Layman shares compelling research on protein requirements, nutrient density, and how misleading narratives around fat and cholesterol have shaped our food choices. This conversation will challenge what you think you know about nutrition and empower you with evidence-based strategies for long-term health.

Key Points:

• The real reason behind the obesity epidemic
• Why 45% of Americans are consuming too little protein – and what that means for metabolic health
• How dietary guidelines became politically driven and scientifically flawed
• The food industry’s role in pushing low-nutrient, high-profit foods
• The dangers of refined grains and ultra-processed foods on body composition
• Breaking the stigma around red meat and cholesterol

FREE PROTOCOL:

We’ve put together everything you need to know from this episode into the Ultimate Protein Blueprint Protocol—grab it here: https://institute-for-muscle-centric-medicine.kit.com/872e26a3d2

Who is Dr. Donald Layman?

Dr. Donald Layman is one of the world’s foremost experts in protein metabolism and muscle health. A professor emeritus at the University of Illinois, his pioneering research has shaped modern understandings of protein requirements, nutrient timing, and the role of muscle in metabolic health. Over decades of work, Dr. Layman has challenged mainstream nutrition dogma and continues to advocate for evidence-based dietary recommendations that prioritize optimal human performance and longevity.

This episode is brought to you by:

• Puori - Code DRLYON for 20% OFF - https://puori.com/DRLYON
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Find Dr. Donald Layman at:

Metabolic Transformation - https://www.metabolictransformation.com/

Find me at:

• Instagram: @drgabriellelyon
• Tik Tok: @drgabriellelyon
• Facebook: facebook.com/doctorgabriellelyon
• YouTube: youtube.com/@DrGabrielleLyon
• Apply to become a patient - https://drgabriellelyon.com/new-patient-inquiry/
• Join my weekly newsletter - https://institute-for-muscle-centric-medicine.ck.page
• Get my book - https://drgabriellelyon.com/forever-strong/

Timestamps:

(00:00) - Welcome & Introduction

(03:00) - The State of the American Diet

(08:30) - The Role of Protein in...