Sometimes You Need Data. Sometimes You Need Direction.
One of the smartest people I know in the world of heart health is my friend, Dr. Jack Wolfson, a board-certified cardiologist who built his entire practice around a simple, powerful motto: "Test, Don't Guess."
Jack believes—and he's right—that your body keeps the receipts. Bloodwork, advanced lipid panels, coronary calcium scores, nutrient levels, hormones, inflammatory markers. Measure them, and you stop arguing about what might be going on and start working with what is going on.
I love that motto so much that I borrowed it—and then I twisted it.
On Destination Health, you'll often hear me say something that sounds like the complete opposite: "Guess, Don't Test."
Not because I'm against testing. Quite the opposite.
When I say "guess," I mean we start with the clues your body is already giving us. We read your symptoms, change one variable at a time, and let your body tell us whether we're on the right track. We experiment our way toward an answer instead of writing a four-figure check before we've even changed what we're eating for breakfast.
It's become a running joke between Jack and me. He'll tell you, "Test, Don't Guess." I'll smile and say, "Guess, Don't Test."
The truth is, we're both right.
Testing often saves time. Guessing often saves money. The real skill is knowing which one the moment in front of you is asking for.
That raises the question every person eventually faces:
When do you need a lab, and when do you just need a plan?
After years of doing this—and especially after a recent run of tougher cases—I've landed in a different place than I was even a few years ago. I no longer believe you have to choose one philosophy over the other. Both approaches have tremendous value. The challenge is recognizing which path makes the most sense for the situation you're facing.
The Case for Testing
Jack's philosophy exists because the human body is very good at hiding things.
You can feel "fine" while your blood sugar quietly climbs for a decade. You can have textbook-normal cholesterol and still be growing plaque in your arteries. You can be exhausted and have no idea whether it's your thyroid, your iron, your blood sugar, or your sleep—because all four feel identical from the inside.
Testing cuts through that fog.
A good panel can catch a problem years before you'd ever feel it, separate two conditions that produce the same symptom, and give you a number you can actually move and re-measure.
When the stakes are high—heart disease, autoimmune flares, anything where guessing wrong costs you real time—objective data isn't a luxury. It's the responsible move.
There's a reason Jack's patients leave with a binder full of results: you can't manage what you refuse to measure.
The Case for the "Experiment" Approach
Here's the reality for a lot of the people I serve, especially drivers and working folks: the gold-standard workup Jack runs can cost thousands of dollars, and insurance often won't touch the functional pieces.
If the price of admission to better health were a giant lab bill, many people would simply never start.
And "never start" is the worst health plan there is.
So we start where it's free—with your symptoms and your daily habits.
The truth is that the most common problems I see don't actually require a lab to begin fixing. Poor sleep, blood-sugar roller coasters, dehydration, too much processed food, not enough movement, chronic stress—you don't need a blood draw to know whether cutting soda and fast food for three weeks makes you feel better.
Your body runs the experiment for you every single day.
This is where the "test on you, don't guess about you" version earns its keep. We change one thing at a time. We give it long enough to matter. We track how you actually feel—energy, digestion, sleep, mood, cravings.
More often than people expect, the symptom-and-experiment route walks them most of the way back to feeling like themselves again, and it costs them nothing but attention and consistency.
Where I've Been Humbled Lately
I'll be honest with you, because Jack would want me to be.
Lately I've had more cases where the experiment alone wasn't enough—and that's exactly when testing became the hero.
These were people who did everything right. They cleaned up their diet, fixed their sleep, cut the junk, stayed consistent for weeks—and only got partway there.
A few years ago I might have told them to stay the course.
Now I know better.
When someone is doing the work and the needle still won't move, that stall is information. It's the body telling us there's a hidden variable we can't see from the outside—a thyroid that's genuinely struggling, an iron or B12 deficiency, a gut infection, a blood sugar problem that's further along than symptoms suggest, or an inflammatory marker running hot.
In every one of those cases, the right test—not every test, the right test—was the thing that finally unlocked the case.
We stopped circling the problem and named it.
Once you can name it, you can fix it.
That's Jack's point, proven through my own clients.
The lab didn't replace the experiment.
It simply picked up where the experiment ran out of road.
So How Do You Decide?
You don't have to pick a team.
You simply have to read the situation.
Here's the framework I use.
Start with the free stuff first. If you haven't cleaned up your diet, fixed your sleep, hydrated, and gotten moving, do that before you spend a dollar on testing. You'll be amazed how many "mysteries" solve themselves, and any testing you do afterward will be cleaner and easier to interpret.
Test early when the stakes are high. Heart disease in the family, autoimmune symptoms, or anything where guessing wrong carries real consequences—don't experiment your way through that. Get the data.
Test when you stall. If you've been consistent for four to six weeks and you're only partway better, stop guessing and start measuring. A stall isn't failure. It's information.
Test to confirm, not just to discover. Sometimes the best reason to run labs is to prove your plan is working. Watching numbers improve is powerful motivation.
"Testing saves time. Guessing saves money. The real skill is knowing when to do each."
The Bottom Line
Jack says, "Test, Don't Guess."
I say, "Guess, Don't Test."
And we're both right, because we're answering two halves of the same question.
His philosophy protects you from missing what you can't feel.
Mine protects you from sitting on the sidelines because you can't yet afford the perfect workup.
Testing saves time.
Guessing saves money.
The wisdom isn't found in choosing one over the other.
The wisdom is knowing the right path at the right time.
Use your body as your first source of information. Use a real lab when your body has taken you as far as it can. Start with the simple things, stay consistent, and bring in testing when the stakes—or the stall—call for it.
That's not a compromise between two philosophies.
It's the best of both.
Want Help Figuring Out Your Next Move?
This is exactly what we work through on Destination Health.
Call into the show with your situation and we'll talk through whether you're ready to start experimenting or whether it's time to test. If you'd like one-on-one help building a diet and supplement plan around your own symptoms and lab work, reach out about coaching.
You don't have to guess your way through this alone.
Tune in, call in, and let's figure out your next step together.
This article is for general education and is not a substitute for personalized medical advice. Always work with a qualified healthcare provider before making changes to your care.
