Your Health Is Not That Complicated
A one-page mental model that makes everything else click
You can probably explain, in simple terms, how your car engine works: fuel goes in, combustion happens, wheels turn. You might even know how your business works, revenue in, expenses out, profit (hopefully) left over.
But ask most people how their own body works and you get a shrug. Maybe something about calories. Maybe a vague reference to cholesterol being bad.
This is a problem because you can’t optimize what you don’t understand. And most people are making health decisions, what to eat, what to supplement, whether to worry about a blood test result, with no mental model of how any of it actually works.
The health industry loves this. Confusion sells courses, supplements, and doctor visits. Every week there’s a new superfood, a new thing that’s going to kill you (are coffee or eggs good or bad this week? Who knows!), a new protocol from some shirtless guy on Instagram who is in his 20’s, has perfect genetics and zero chronic health issues. It’s overwhelming by design.
Here’s what I’ve learned after years of fixing my own health issues, losing weight, and getting every biomarker in range: your body and health is not that complicated. Not if you have the right mental model.
Why You Need a Mental Model
Without a framework, health is just a pile of disconnected facts. Cholesterol is bad. Inflammation is bad. Get more sleep. Take vitamin D. Eat less sugar. Exercise more.
All of that is sort of true. None of it is useful without understanding why it matters and how it connects.
A mental model gives you something most people never have: the ability to evaluate health information for yourself. When your doctor tells you something, you can actually understand what they’re talking about. When you see a headline about some new study, you can judge whether it’s relevant to you or clickbait. When something feels off in your body, you have a framework for figuring out where to look first.
That’s high-agency health. Not trusting blindly or ignoring everything. Understanding enough to make your own informed decisions and ask better questions.
The Master System
Before I give you the mental model, you need to understand one thing that ties everything together.
Your body’s master system is energy metabolism. This is the system that makes everything else work. Your hormones, your neurotransmitters, your immune function, your ability to think clearly, all of it runs on this engine.
You hear all the time that depression is a “chemical imbalance.” Anxiety is a chemical imbalance. Brain fog, low energy, mood swings, all chemical imbalances.
Fine. But where do you think those chemicals come from?
Your body builds them from nutrients. Some are endogenous, meaning your body produces them internally, but even those depend on exogenous inputs, the stuff you get from food and supplements. Your body cannot manufacture what it doesn’t have the raw materials for.
So the aha moment is simple: if you can get the right nutrients into your body in the right forms, you should be able to fix a huge number of those “chemical imbalances” at the source. Not mask them. Fix them.
This is why nutrition matters so much more than most people realize. It’s not about calories and weight loss. It’s about giving your body the raw materials to run every system properly. Energy metabolism is the master process, and everything downstream depends on it getting what it needs.
Keep that in your head as we go through the four levers.
The Four Levers
Your body is complex. Trillions of cells, dozens of systems, thousands of chemical reactions every second. But the things that actually go wrong? Those are surprisingly predictable.
Almost every common health problem traces back to one of four levers being pulled in the wrong direction. Fix these four and you eliminate the vast majority of what makes people sick, tired, and foggy.
Lever 1: Weight
Start here because everything else gets harder when you’re carrying too much.
If your weight is too high, your body is working overtime just to exist. Your heart rate is elevated even at rest. Your blood pressure rises because your cardiovascular system has to push harder to circulate blood through more tissue. Your joints take a beating. Your organs are stressed.
I watched elderly family members go through end-of-life health scares, and something clicked for me. When the weight came off, for whatever reason, entire cascades of health problems disappeared. High blood pressure, cholesterol issues, breathing problems, gone. Their doctors took them off all their medications. I also noticed there aren’t many obese people who live past their 70’s (or at the nursing home). You can draw your own conclusions from that.
What goes wrong when this lever is off: Heart disease, joint deterioration, type 2 diabetes, sleep apnea, increased cancer risk, hormonal disruption, chronic fatigue.
The fix isn’t complicated. Find your BMR, create a modest calorie deficit of 200-300 calories per day, and you’ll lose about a pound a week. That’s sustainable. Track your food for a few days in something like Cronometer and you’ll be stunned at where the “calorie bombs” are hiding.
Lever 2: Blood Pressure
Think of your blood vessels like a garden hose. Blood pressure is the water pressure inside that hose. When it’s too high for too long, it starts damaging the walls.
This is why blood pressure is the first thing any doctor checks. It’s the canary in the coal mine. High pressure damages your blood vessel walls, which forces your body into constant repair mode. It stresses your kidneys (which are basically two very sophisticated blood filters). Over time, the damage compounds.
What goes wrong when this lever is off: Stroke, heart attack, kidney disease, vision loss, cognitive decline, peripheral artery disease. Your kidneys are particularly vulnerable because they filter your entire blood supply dozens of times per day, and high pressure slowly destroys the tiny vessels that do the filtering.
Weight is the biggest driver of blood pressure. Regular exercise and losing weight usually bring it down. If you fix Lever 1, Lever 2 often fixes itself.
Lever 3: Blood Quality
This is about what’s actually circulating in your blood. Specifically, sugar and cholesterol.
Here’s the mental model that changed how I think about this: imagine processed sugar and certain types of cholesterol as tiny shards of glass traveling through your blood vessels. They make small cuts in the vessel walls as they pass through. Your body detects the damage and deploys cholesterol to patch the cuts, which is exactly what cholesterol is supposed to do. But when the damage is constant, the patches build up. Layer after layer. Eventually they block the vessel entirely.
That’s a heart attack. Or a stroke. Or peripheral artery disease. Or poor circulation that makes everything worse.
What goes wrong when this lever is off: Heart attacks, strokes, peripheral artery disease, poor circulation to extremities, erectile dysfunction (yes, it’s a blood flow problem), increased dementia risk, diabetic complications.
This is why we measure glucose, fasting insulin, A1C, cholesterol ratios, ApoB, and Lpa. These are all indicators of what’s floating around in your blood and whether it’s helping or slowly killing you. ApoB in particular is emerging as probably the single most important number for predicting heart disease.
Lever 4: Inflammation
Inflammation is what happens when the first three levers are off. It’s the body’s alarm system, and when it’s blaring constantly, everything breaks down.
Overweight? Your body is inflamed from the extra stress on every system. High blood pressure? The constant pressure damages vessels and triggers an inflammatory response. Bad diet? The “shards of glass” are creating damage that requires constant inflammatory repair, which is why your cholesterol is high.
Put it all together and you get chronic inflammation, which many doctors now believe is the root driver behind most cancers, autoimmune conditions, and chronic disease.
What goes wrong when this lever is off: Cancer, autoimmune disorders, chronic pain, accelerated aging, gut disorders, Alzheimer’s and neurological decline, skin conditions. The research connecting chronic inflammation to nearly every major disease category gets stronger every year.
CRP (C-Reactive Protein) is the best single number to measure overall body inflammation. If it’s under 1.0, you’re in good shape. Between 1 and 3 is average (which means not great). Over 3 and something needs attention (but don’t measure it if you were recently sick as being sick causes inflammation and will boost that number for several days afterwards).
The Flow
Here’s how the four levers connect into one simple cascade:
Keep your weight down → that keeps your blood pressure down → eat clean so your blood doesn’t have problem-causing stuff in it → exercise to move the bad stuff out and keep everything circulating → inflammation stays low.
That’s the whole model. Everything else in health, every supplement, every biomarker, every intervention, is a detail within this framework. When someone tells you about a new health protocol or supplement, you now have a way to evaluate it: which of these four levers does it pull? If the answer is none, it’s probably noise.
The Foundation Underneath
Two things sit underneath all four levers. If these are broken, the levers won’t respond no matter what you do.
Sleep. This is always step one. Your body recharges, makes repairs, consolidates memories, and regulates hormones while you sleep. Mess with sleep and your blood pressure rises, your hunger hormones go haywire (making weight loss nearly impossible), your stress response gets amplified, and your immune system weakens. I’ve seen people fix “mysterious” health problems just by getting their sleep right. Most people need 6.5 to 9 hours per night, and a scary number of people have undiagnosed sleep apnea that’s silently destroying their health.
Stress. Constant stress generates cortisol, and too much cortisol wreaks havoc on every system in your body. It raises blood pressure, spikes blood sugar, makes it almost impossible to lose weight, disrupts sleep, and suppresses your immune system. Note that some stress is normal and even beneficial. It’s the constant stress that’s the killer. If you feel “wired” all the time, can’t lose weight despite eating well, or can’t seem to relax even when everything is fine, cortisol is probably part of the equation.
Sleep and stress aren’t a fifth and sixth lever. They’re the foundation. Fix them first, or nothing else will work properly.
What This Means For You
You now have a one-page mental model of how your body works. Weight, blood pressure, blood quality, inflammation, all sitting on a foundation of sleep and stress, all powered by the master system of energy metabolism.
This is enough to have an intelligent conversation with your doctor. Enough to evaluate whether a new supplement or protocol is worth trying. Enough to stop feeling overwhelmed by health information and start making decisions like someone who understands the machine they’re operating.
In Part 2, I’ll break down the major body systems one by one, what they do in plain English, the one or two numbers that tell you if each one is working, and the highest-leverage fix for each. That’s the owner’s manual.
But the mental model comes first. Because you can’t optimize what you don’t understand, and now you understand more about how your body works than most people ever will.
If you want to put this into action right now, The Health Optimizer in Zorga, my life operating system, takes this exact mental model and turns it into a step-by-step checklist. Biomarkers to track, what order to test them, and what to do when something’s off. It’s the tool I built for myself and it’s saved me years of guesswork.
If you got value from Part 1 of the supplement series, this is the foundation underneath it. You can’t build a smart supplement stack on a body you don’t understand.
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