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Summary
On episode 542 of 40+ Fitness, Coach Allan sits down with Emily Gold Mears, a former practicing lawyer turned citizen scientist, biohacker, and health advocate whose research sits at the intersection of functional and conventional medicine. Emily wrote Optimizing Your Health, An Approachable Guide to Reducing Your Risk of Chronic Disease.
They cover terrain theory versus germ theory and how the immune system responds to invaders, why acute inflammation is healthy but chronic inflammation drives disease, and why how you breathe affects nearly every other system in the body.
The conversation also gets into cold thermogenesis, why testing before you supplement matters, how misleading supplement labels can be, and why gut health, sleep, and nutrition top Emily’s own list of priorities.
Links
- https://emilygoldmears.com
- https://www.ewg.org
Key Takeaways
- Terrain theory complements germ theory. Germ theory focuses on killing the pathogen; terrain theory says your body’s internal resilience determines whether and how badly you get sick, so building overall health strengthens your ability to fight off invaders rather than relying on avoidance alone.
- Acute inflammation is necessary; chronic inflammation is the problem. Inflammation heals injury and then should turn off; when it doesn’t, it becomes chronic inflammation, the precursor to most chronic disease, and it accelerates as aging immune cells and mitochondria lose function.
- How you breathe affects nearly everything. Breathing shapes stress, cardiovascular health, sleep, and immune function, yet most people breathe shallowly through the mouth and chest; box breathing (inhale, hold, exhale, hold on a slow count) is an accessible way to calm the nervous system.
- Cold thermogenesis works through hormesis. A short, controlled stressor, like 30 seconds of cold water at the end of a shower, prompts the body to adapt, lowering inflammation and potentially building metabolically active brown fat instead of white fat.
- Test before you supplement. Emily once took 50 to 60 supplements a day before realizing nutrients work synergistically; loading up on isolated vitamins without knowing your baseline, such as too much zinc throwing off copper levels, can do more harm than good.
- Supplement labels can mislead. A “natural” label legally requires only 10 percent plant-derived ingredients, and much of the market comes from a handful of large manufacturers using synthetic fillers, so look for doctor-only brands or third-party certifications like GMP, QAI, or USDA Organic.
- Fish oil is frequently rancid. Independent testing resources can check a specific brand’s toxicity rating before you trust the label.
- Gut health underlies almost everything else. Most people have some degree of gut dysfunction, and fixing it, alongside consistent sleep and a whole-food, minimally processed diet, has an outsized effect on the rest of the body’s systems.
- Emily’s three strategies to get and stay well: optimize your gut first since it affects every other system; build effective, consistent sleep habits; and eat a clean, largely unprocessed diet, using resources like the EWG’s list to know which produce is worth buying organic.
“Our internal health is responsible for how we react to invaders, whether or not we will get sick.”
Emily Gold Mears
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Episode 564 – Why most people fail at their health and fitness goals