Daylight savings may be on the chopping block, but the bigger health disruption we can actually fix today might be hiding in plain sight: low zinc status. We walk through why zinc is an essential micronutrient you cannot store, why it often slips past routine medical testing, and why modern diets can create a quiet gap between “zinc consumed” and “zinc absorbed.” If you care about energy, immunity, fertility, and healthy aging, zinc deficiency and zinc bioavailability deserve a spot on your radar.

From there, we get into the strongest part of the evidence: a systematic review and meta-analysis of randomized controlled trials on zinc supplementation in type 1 diabetes, type 2 diabetes, gestational diabetes, and prediabetes. We unpack what improved most, including insulin resistance markers like fasting insulin and HOMA-IR, along with inflammation (C-reactive protein) and oxidative stress measures (malondialdehyde and total antioxidant capacity). We also explain why zinc’s role in antioxidant enzyme systems such as superoxide dismutase can matter when inflammation and reactive oxygen species are driving cardiometabolic risk.

We then make it practical: which groups are most likely to struggle with zinc status (older adults, people with GI issues, post-bariatric surgery, pregnancy and lactation, and long-term acid suppression users), and which foods reliably deliver bioavailable zinc. We also add a crucial nuance many people miss, the copper to zinc ratio, and how high-copper patterns can shift that balance in ways that may affect infection risk and cardiovascular disease risk.

If you found this helpful, subscribe, share the episode with a friend who is working on metabolic health, and leave a quick review so more people can find the show. What’s one change you’d make to improve zinc intake or absorption starting this week?

Audio Recording

Zinc Slide Deck

Zinc deficiency in patients with type 2 diabetes increases risk of cardiovascular diseases- Tehran Lipid and Glucose Study

Zinc and Type 2 Diabetes- A Systematic Review with a Narrative Synthesis of Their Bidirectional Relationship and Clinical Perspectives for Personalized Nutritional Support

Study on Reference Range of Zinc, Copper and Copper:Zinc Ratio in Childbearing Women of China

Serum Zinc Concentrations in the US Population Are Related to Sex, Age, and Time of Blood Draw but Not Dietary or Supplemental Zinc

Serum copper-to-zinc-ratio and risk of incident infection in men- the Kuopio Ischaemic Heart Disease Risk Factor Study

Low zinc levels at clinical admission associates with poor outcomes in COVID-19

Effects of Zinc Supplementation on Glycemic Control, Insulin Resistance, Inflammation and Oxidative Stress in Diabetes- A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Heavy water sounds like a chemistry trivia fact until you realise it may be sitting at the crossroads of energy, ageing, and chronic disease. We talk about deuterium, the heavier isotope of hydrogen, and why even one extra neutron can matter when that hydrogen becomes part of the water that surrounds your proteins and powers your mitochondria. If you care about mitochondrial health, oxidative stress, insulin sensitivity, and longevity, this is a surprisingly practical conversation hiding inside a physics story.

Mark Pettus MD and John Bagnulo PhD, MPH walk through what deuterium is, where it shows up in our environment, and why modern patterns may increase deuterium load over time. We dig into the mechanism that keeps popping up: the mitochondrial electron transport chain is a precise system, and deuterium-heavy water can slow it down, reducing efficiency and increasing stress signals downstream. We also look at why hype and devices can derail credibility, and why you do not need a machine to start applying the fundamentals.

From there, we connect lifestyle to biology. Burning fat creates metabolic water that is naturally lower in deuterium, which helps explain why ketogenic or lower-carb eating keeps showing up alongside better metabolic outcomes. We discuss food choices that tend to push deuterium higher, why local and seasonal eating may matter more than people think, and how sunlight, infrared light, and “exclusion zone” water concepts fit into a broader hydration and performance picture.

If this changes how you think about water, share it with a friend, subscribe for more evidence-based self-care, and leave a review so more people can find the show. What’s one habit you’re willing to test first: carbs down, sunlight up, or more daily movement?

Deuterium Depleted Water Slides

References Noted:

Deuterium trafficking, mitochondrial dysfunction, copper homeostasis, and neurodegenerative disease

Deuterium-depleted water stimulates GLUT4 translocation in the presence of insulin, which leads to decreased blood glucose concentration

Explaining deuterium-depleted water as a cancer therapy- a narrative review

The biological impact of deuterium and therapeutic potential of deuterium-depleted water

To lower deuterium in your body, prioritize a ketogenic-style diet…

Nutritional deuterium depletion and health- a scoping review

Chronic disease doesn’t feel “modern” when you’re living it, but the causes often are. We take on the Paleodeficit Syndrome, the idea that your body still runs on an ancestral operating system while your environment has been rewritten in a few generations. That mismatch helps explain why obesity, insulin resistance, prediabetes, type 2 diabetes, fatty liver, and cardiovascular risk keep rising even as nutrition advice gets louder and more confusing.

We dig into the biggest dietary shifts that separate ancestral eating from the modern diet: grain dependence after agriculture, acellular carbohydrates from refined flour, ultra processed foods, industrial seed oils and omega 6 excess, and the way fortification can hide a low nutrient diet inside “enriched” staples. We also explore why potassium, iron, and zinc bioavailability matter, why fermentable fiber and the gut microbiome are central to metabolic health, and why seasonality used to shape human physiology in ways we rarely consider now.

Then we bring receipts. We discuss a short clinical Paleo diet intervention where insulin resistance markers (HOMA IR) and triglycerides improved fast, and we push past the simplistic cholesterol narrative by focusing on LDL particle quality: small dense versus large buoyant LDL and how insulin levels influence both. Along the way, the agouti mouse research makes the case for nutritional epigenetics, showing how diet can change gene expression and even affect future generations.

If you want practical ancestral health takeaways without hand waving, this one will challenge you in the best way. Subscribe, share with a friend who’s tired of nutrition whiplash, and leave a review so more people can find the show. What part of the modern diet do you think is most out of sync with human biology?

Natural environments, ancestral diets, and microbial ecology- is there a modern “paleo-deficit disorder”? Part II

Paleo-Deficit Slides