- Bioindividuality
- patterns
- gut & food
The Art of Experimenting With Your Own Health (and Why You Should be Doing it Daily)
Ely Henderson · · 6 min read
Let me say something that's going to sound weird at first.
Bryan Johnson — the guy who takes 100 pills a day, never eats after 11am, measures his own testosterone levels every few weeks, and got transfusions of his own son's plasma — is doing the bare minimum.
Not the extreme. The bare minimum.
The bare minimum of actually giving a damn about understanding his own body.
And the fact that it looks insane to most people isn't because he's doing too much. It's because the rest of us have been conditioned to do absolutely nothing. To just follow whatever the government's current food pyramid says, take the supplements an influencer is paid to promote, and hope for the best.
We've outsourced our health to people who don't know us. And then we wonder why we feel terrible.
What Bryan Johnson Is Actually Doing
Strip away the price tag and the weird plasma stuff and here's what Johnson is actually doing:
He's testing his own body. Systematically. He measures something, changes one thing, measures it again, and keeps what works. Over and over. For years.
That's it. That's the whole method.
He started Blueprint as a broken down 42-year-old with chronic depression, terrible sleep, joint pain, and years of feeling like garbage. He didn't just try to fix it by googling symptoms or asking a doctor who had 15 minutes with him. He built an entire system to understand what was happening inside his body and what was actually moving the needle.
And here's the most important thing he's done that nobody talks about: he quit things that weren't working for him.
He ran rapamycin — one of the most hyped longevity drugs in the world with serious scientific backing — for nearly five years. His own data showed it was hurting him. Causing infections, messing with his blood sugar, raising his resting heart rate. He stopped. Immediately.
That's the part worth copying. Not the $2 million. Not the plasma. The willingness to test, measure, and throw out anything that isn't working for his specific body — even if the population data says it should work.
His team's tagline is "one size fits none." He's living that sentence.
Health Is an Implementation Problem
Here's what nobody in the $6.8 trillion wellness industry wants to admit.
Health isn't a technology problem. It isn't a science problem. It's an implementation problem. The advice was built on straws — population averages, government guidelines shaped by food industry lobbying, studies designed to answer what works for most people — and it collapsed under its own weight years ago.
The food pyramid told an entire generation to eat 6 to 11 servings of bread and pasta a day and use fat sparingly. Americans followed it. Between 1971 and 2011 fat dropped from 45% to 34% of calories. Carbs went up. And obesity went from affecting around a third of Americans to nearly two thirds.
The advice wasn't just wrong for some people. For a lot of people it was the opposite of what they needed.
The Weizmann Institute put continuous glucose monitors on 800 people and tracked 46,898 meals. They found that identical foods produce wildly different, sometimes opposite, blood sugar responses in different people. Some people spiked harder after eating tomatoes than after eating ice cream. Some had worse responses to brown rice than chocolate.
The conclusion from lead researchers Eran Segal and Eran Elinav was simple: personalised eating choices are more likely to help people stay healthy than universal dietary advice.
One size does not fit all. It never did. But we kept pretending it did because it was easier to print a pyramid than to actually understand individuals.
You Should Be Doing This Too
I know what you're thinking. Bryan Johnson has a team of 30 doctors and spends $2 million a year. That's not me.
You're right. You don't need any of that.
What you need is the method. And the method is free.
Pick one thing. Change it. Track how you feel. Keep it or kill it. Move to the next thing.
The scientists who changed medicine did this on themselves with almost nothing. Barry Marshall drank actual bacteria in 1984 to prove that ulcers were caused by an infection, not stress. He had no fancy equipment. He just had a hypothesis, a Petri dish, and the guts to test it on himself. He won the Nobel Prize for it.
Werner Forssmann threaded a catheter into his own heart in 1929 to prove it could be done safely. His boss told him no. He did it anyway. Nobel Prize.
Jonas Salk tested his polio vaccine on his own family before the largest vaccine trial in history.
These people understood something we've forgotten: sometimes the most important experiment you can run is the one you run on yourself.
What to Actually Test (And For How Long)
Here's where it gets practical. Because the point of all this isn't just to admire Bryan Johnson from a distance. It's to start running your own experiments.
The key rule with any experiment: it needs to be long enough to actually see results. One day proves nothing. Your body needs time to respond, adapt, and show you what's actually changing.
Week 1 — The easiest experiment you can run. Fix your wake time. Same time every morning including weekends. No snoozing. A study tracking 60,977 people found that sleep regularity predicted mortality better than sleep duration. The most consistent sleepers had 30% lower all-cause mortality. You don't need any equipment. Just a consistent alarm. One week. See how you feel.
Week 2 — Walk after you eat. Not a long walk. Not a workout. Just 10 minutes after your biggest meal. Research shows even 2 to 5 minute walks after meals reduce blood sugar spikes by around 17% compared to sitting. This is one of the highest ROI health habits that exists and almost nobody does it. Two weeks. Watch your energy after meals.
Week 3 — Test your caffeine cutoff. If you drink coffee, move your last one to noon for a week. Then track your sleep. If you feel dramatically different — better sleep, less anxiety, more energy in the afternoon — you might have the CYP1A2 slow metaboliser gene that keeps caffeine in your system for up to nine hours. We wrote a full post about this. The point is: test it yourself first. Your body will tell you before any gene test does.
Month 1 — Elimination experiment. Pick the food you most suspect is causing you problems. Bloating, brain fog, skin issues, low energy after eating it. Remove it completely for three to four weeks. Then reintroduce it and watch what happens. This is how you find your personal food villains, the ones mainstream nutrition told you were fine.
Month 2 — Eat in a tighter window. Stop eating three hours before bed for five weeks. Research from Pennington Biomedical showed this alone lowered blood pressure by 11 points in people who tried it — without changing what they ate or how much they exercised. Just the timing. Test it. Measure how you sleep, how you feel in the morning, your energy through the day.
Month 3 — Add some numbers. By now you have a sense of what moves your body. Add an objective layer. A cheap sleep tracker. A two-week continuous glucose monitor. A basic blood panel — ApoB, HbA1c, vitamin D, hsCRP. Not because the numbers are the point. Because they validate what you've been feeling. And sometimes they catch something your feeling missed.
What Helps One Person Can Hurt Another
This is the thing I keep coming back to.
What helps one person can do nothing for another. What helps one person can actively hurt a third person. And in rare, beautiful cases, something tiny and specific changes someone's life completely.
Eating a pickle when you're stressed sounds like a joke. But for some people with low sodium from high cortisol, that's exactly what their body is asking for. A 20 minute walk every morning does more for some people's mental health than any antidepressant. For others it does nothing.
Different foods. Different locations. Different childhoods. Different relationships. Different events that shaped how your body responds to stress. All of it is different. All of it matters.
This isn't a technology problem or a science problem. It's the fact that we've been trying to solve an individual problem with population-level answers.
The goal isn't to find what works for everyone. The goal is to find what works for you.
The Long Game
Here's the thing about experimenting with your own health. It isn't supposed to change your life overnight.
It's supposed to change it slowly, naturally, and permanently.
When you start paying attention to how you actually feel — tracking it, noticing what precedes your good days and your bad ones, testing one thing at a time — you naturally become healthier over time. Not because you followed a plan. Because you developed a relationship with your own body.
That's what Bryan Johnson has with his body. Not a perfect body. A relationship with it. He knows what it responds to. He knows what hurts it. He knows when something is working and when it isn't.
And you can have that too. Without the $2 million. Without the 30 doctors.
When you find a pattern that feels true — like coffee after noon wrecks your sleep, or you always feel amazing after you move your body in the morning, or a certain food leaves you foggy every single time — you can verify it. A blood test. A genetic panel. A CGM. Those tools exist to confirm what your body is already telling you, not to replace that signal.
The genome tells you why. The blood test confirms the pattern. But the feeling started it.
Normal Is Built for This
I built Normal because I think this kind of relationship with your own body should be accessible to everyone. Not just people with $2 million and a medical team.
You tell Normal how you feel. Naturally. Whenever you feel something worth noting. Over time Normal connects those feelings to what's been happening in your life — what you ate, how you slept, how you moved, what your wearable picked up — and surfaces the patterns you couldn't see on your own.
Not because you're tracking obsessively. Because you're paying attention.
If you have a wearable, Normal ties that data to your feelings too. Suddenly you can see that your worst nights of sleep all followed days with coffee after 2pm. Or that your best energy days all start with movement before 10am. Or that something as small and specific as eating a pickle when you're stressed is the thing that breaks the anxiety spiral every time.
That's the whole point. Not to optimize endlessly. To understand yourself well enough to stop feeling like health is something that happens to you, and start feeling like it's something you're actively in relationship with.
Start your first experiment at trynormal.ai
FAQ
Is Bryan Johnson actually healthy or just obsessed? Probably both. His biomarkers are genuinely impressive — aging-rate scores, cardiovascular markers, and organ function tests that beat people decades younger. But the obsession level isn't the point. The method is: test, measure, keep what works, kill what doesn't. You can run that same method without the obsession or the price tag.
How long do I need to run an experiment to know if it's working? Depends on what you're testing. A walk after meals shows results same day. Sleep regularity shows up in a week. An elimination diet needs three to four weeks minimum. Time-restricted eating needs five to twelve weeks for meaningful metabolic changes. The rule is: if nothing has changed by the end of the right window, that experiment isn't your answer. Move to the next one.
What's the difference between self-experimenting and just trying random things? One variable at a time. That's the whole difference. When you change ten things at once you have no idea what moved the needle. Change one thing, track how you feel for the right amount of time, then decide. That's an experiment. Everything else is just chaos.
Do I need blood tests and genetic testing to start? No. Start with how you feel. That's your most sensitive instrument. Blood tests and genetic panels are for confirming patterns you've already noticed, not for finding them in the first place. Once you have a clear pattern, verify it. Until then, the data that matters most is the data your body is already generating.
What does Normal actually do that I can't do myself? You could do it yourself. But you won't, because it requires remembering to log things, connecting dots across weeks of data, and having enough health knowledge to know what the patterns mean. Normal handles all of that. You just tell it when you feel good or bad, and it builds the picture. If you have a wearable, it pulls that in too. The patterns it finds are the ones your brain couldn't hold together on its own.