Inside Your Biology

About Inside Your Biology

Inside Your Biology is a deep-dive health and science podcast about what is actually happening inside the human body. Why does inflammation help us heal but also contribute to disease? What does cholesterol really do? Why does blood pressure rise? How does insulin control energy? What changes when we sleep, exercise, age, gain muscle, lose fat, or get sick? Each episode starts with one familiar health question and follows it down into the biology. We explore physiology, medicine, metabolism, nutrition, exercise, sleep, hormones, immunity, aging, disease, prevention, and the research scientists use to understand them. Along the way, we separate established evidence from emerging research, association from causation, biological mechanisms from real-world outcomes, and useful health information from exaggerated wellness claims. This is not a show about miracle cures or diagnosing listeners. It is about understanding the machinery.

Publisher

Wilder Brooks

Category

education · health & fitness

Language

en

Explicit

No

First episode

30 Sept 2026

Latest episode

9 Nov 2026

Latest episodes

8 episodes in the feed.

1. 

   9 Nov 2026

   The Liver: What Does “Detox” Actually Mean?

   “Detox” has become one of the most abused words in health. Juice cleanses promise it. Supplements claim to support it. Social media tells us certain foods can “flush toxins” from the body. But your body already has an extraordinarily sophisticated chemical-processing system and the liver sits at the center of it. In Episode 8 of Inside Your Biology, we investigate what the liver actually does with alcohol, medications, nutrients, hormones, fats, and potentially harmful compounds. We explore liver metabolism, detoxification enzymes, bile, glycogen, cholesterol, ammonia, fatty liver disease, alcohol metabolism, drug interactions, and what happens when this organ begins accumulating fat or losing function. And we ask the question behind one of wellness culture’s biggest claims: If the liver already detoxifies the body, can anything really “detox” the liver itself? Inside Your Biology — The science of what’s happening inside you.

2. 

   30 Oct 2026

   The Immune System: How Does Your Body Know What Belongs?

   Every second, your immune system is making decisions. Ignore this. Attack that. Repair this tissue. Remember that pathogen. Do not attack yourself. Most of the time, those decisions happen without you noticing. In Episode 7 of Inside Your Biology, we investigate how the immune system recognizes threats, coordinates inflammation, builds memory, and avoids attacking the body it is supposed to protect. We explore innate and adaptive immunity, antibodies, T cells, B cells, macrophages, neutrophils, cytokines, lymph nodes, vaccines, immune memory, allergies, autoimmunity, and why a stronger immune response is not always a better one. We also examine popular claims about “boosting” immunity, supplements, fever, getting sick after stress, cold weather, and whether repeated infections make the immune system stronger. The deeper question is: How does a system powerful enough to destroy infected cells learn when to attack and when to leave something alone? Inside Your Biology — The science of what’s happening inside you.

3. 

   25 Oct 2026

   Muscle: Why Your Body Fights to Keep It

   Muscle looks like a system for movement. But biologically, it does far more than move your skeleton. Skeletal muscle stores fuel, helps regulate blood glucose, responds to hormones, adapts to mechanical stress, communicates with other tissues, and becomes increasingly important as we age. In Episode 6 of Inside Your Biology, we investigate how muscle is built, maintained, used, and lost. What actually happens inside a muscle after resistance training? Why does protein matter? What is muscle protein synthesis? Why do strength and muscle mass decline with age? Can inactivity cause meaningful muscle loss surprisingly quickly? And does having more muscle really improve metabolic health? We explore muscle fibers, motor units, mechanical tension, satellite cells, protein turnover, amino acids, insulin sensitivity, glycogen, myokines, resistance training, recovery, aging, sarcopenia, and the difference between muscle size and muscle strength. The deeper question is: Why does the body invest so much energy in maintaining muscle and what happens when that tissue begins to disappear? Inside Your Biology — The science of what’s happening inside you.

4. 

   20 Oct 2026

   Sleep: What Is Your Body Doing While You’re Unconscious?

   Every night, consciousness disappears but the body does not simply shut down. Your brain reorganizes activity. Hormones change. Body temperature falls. Memories are processed. Immune signals shift. Metabolism changes. And throughout the night, the brain repeatedly moves through different stages of sleep. In Episode 5 of Inside Your Biology, we investigate what sleep actually is, why humans need it, and what happens when we consistently do not get enough. We explore circadian rhythms, melatonin, adenosine, deep sleep, REM sleep, memory, metabolism, immunity, cardiovascular function, and the biological consequences of sleep deprivation. Why do we cycle through different sleep stages? Can you “catch up” on lost sleep? Does alcohol really help you sleep? What does your smartwatch actually know about your sleep? And is eight hours truly the magic number for everyone? The deeper question is: Why would evolution require us to spend roughly a third of our lives in a state where we are largely disconnected from the outside world? Inside Your Biology — The science of what’s happening inside you.

5. 

   12 Oct 2026

   Blood Pressure: What Do Those Two Numbers Actually Mean?

   Inside the Force That Keeps Blood Moving and Damages Arteries When It Stays Too High Every time your heart beats, it pushes blood through thousands of miles of vessels. That pressure is essential. Without it, oxygen and nutrients would never reach your brain, muscles, kidneys, or other organs. But when blood pressure remains elevated for years, the same force that keeps you alive can gradually damage the cardiovascular system. In Episode 4 of Inside Your Biology, we investigate what blood pressure actually measures and how the body controls it from moment to moment. What do the systolic and diastolic numbers mean? Why does blood pressure rise during exercise but become dangerous when it stays elevated at rest? What roles do the heart, arteries, kidneys, nervous system, hormones, and blood volume play? Why can someone feel completely normal while their blood pressure is high? And why can a single reading sometimes tell you surprisingly little? We explore arterial stiffness, vascular resistance, cardiac output, sodium and fluid balance, the kidneys, the sympathetic nervous system, the renin-angiotensin-aldosterone system, aging, exercise, sleep, stress, alcohol, body weight, and genetics. We also examine how blood pressure is actually measured including cuff size, positioning, home measurements, ambulatory monitoring, white-coat hypertension, masked hypertension, and normal day-to-day variation. Then we tackle common claims: Does salt cause high blood pressure? Is stress the main cause? Is a lower blood pressure always better? Can you feel hypertension? Does exercise-induced high blood pressure mean something is wrong? And if one measurement is normal, does that mean your cardiovascular system is in the clear? Inside Your Biology — The science of what’s happening inside you.

6. 

   7 Oct 2026

   Blood Sugar: What Actually Happens After You Eat?

   In Episode 3 of Inside Your Biology, we follow a meal through the body to understand how blood sugar is regulated and what changes when that system begins to lose efficiency. We break down what glucose actually is, what insulin really does, how the liver stores and releases energy, why skeletal muscle plays such a major role in glucose disposal, and how glycogen, glucagon, beta cells, and fat tissue all fit into the picture. Then we go deeper into: insulin sensitivity, insulin resistance, compensatory hyperinsulinemia, fasting glucose, post-meal glucose, HbA1c, prediabetes, type 1 versus type 2 diabetes, exercise, sleep, visceral fat, liver fat, diet, genetics, and continuous glucose monitors. We also examine some of the most common claims in modern health culture: Does insulin make you fat? Do carbohydrates cause diabetes? Is every glucose spike harmful? Should healthy blood sugar stay perfectly flat? Is fruit “basically sugar”? And can a continuous glucose monitor tell a healthy person exactly what they should eat?

7. 

   5 Oct 2026

   Cholesterol: The Molecule Everyone Loves to Blame

   Why Your Body Needs It and When It Becomes Dangerous Cholesterol has spent decades being treated like a villain. But your body makes it on purpose. You need cholesterol to build cell membranes, produce steroid hormones, make bile acids, and support normal human biology. So why is it also so closely tied to heart attacks and strokes? In Episode 2 of Inside Your Biology, we go inside the bloodstream to separate cholesterol itself from the particles that carry it. We break down LDL, HDL, triglycerides, apoB, remnant particles, Lp(a), and the difference between cholesterol concentration and particle number. Then we follow those particles into the artery wall to understand how atherosclerosis actually develops. We also examine some of the biggest arguments in modern health: Is LDL really “bad cholesterol”? Is apoB more important than LDL-C? Can high HDL cancel out high LDL? Does eating cholesterol raise cardiovascular risk? Are large LDL particles harmless? What role does inflammation play? And do cholesterol-lowering drugs merely change lab numbers—or do they change real cardiovascular outcomes?

8. 

   30 Sept 2026

   Inflammation: The Body’s Fire Alarm

   You cut your finger and it becomes red, warm, swollen, and painful. That reaction may be uncomfortable but it is also part of the system helping keep you alive. So why has inflammation become one of the most feared words in modern health? In the first episode of Inside Your Biology, we go inside the immune response to understand what inflammation actually is, why the body creates it, and how a protective process can sometimes become harmful. We explore acute versus chronic inflammation, immune signaling, blood vessels, white blood cells, tissue repair, infection, exercise, metabolic health, aging, and the biomarkers researchers use to study inflammatory activity. We also investigate some of the biggest claims surrounding inflammation: Is all inflammation bad? Can food be “inflammatory”? Does exercise cause inflammation or reduce it? What does C-reactive protein actually tell us? Can you feel chronic inflammation? And what does science really mean when a disease is described as inflammatory? The deeper question is: When does the body’s emergency response stop protecting us and start contributing to the problem? Inside Your Biology — The science of what’s happening inside you. For educational purposes only. This podcast does not diagnose medical conditions or replace individualized medical care.

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Apple Podcasts (US)

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Based on episode analysis; this does not confirm that the show is currently accepting guests.