🩺 Start with how you feel
Most people don't know which marker to look up — they just know something's off. Find your symptom, and here are the markers that most often explain it, in the order worth testing — plus the panel that covers them in one click.
💰 Best testing on any budget
You don't need a $1,000 panel to learn something useful. Everything here loads straight into your cart with the discount already applied.
Past that point a ready-made panel is usually better value than adding markers one at a time — the draw fee is included and the per-marker cost drops sharply.
Compare the pre-built panels →🎯 Find your panel
64 panels built around the situation you actually have — not a generic wellness bundle. 55 are custom-built here: each names the exact markers, explains why each one is on the list, and loads the whole set into your cart in one click with 10% off already applied. The other 9 are Marek’s own pre-built expert panels — ready-made, draw fee included, and for a lot of people the simpler buy. Both are listed side by side so you can compare honestly.
✅ Check my results
Type in the numbers from your lab report and see instantly where each one sits against optimal — not just "in range". Nothing is stored or sent anywhere; this runs entirely in your browser.
🧬 Got a result that isn't a number? Genotypes, positive/negative antibodies, tumour markers and drug levels — 23 results with no optimal range, answered properly.
These can't be scored against an optimal range because they don't have one. What they do have is meaning — what each possible result indicates, and what to do next.
Enter values above and this will tell you which panels investigate anything that reads outside optimal. If you haven't tested yet, start from the situation instead.
Find your panel →🚩 Red flags — see a doctor
Everything else in this Vault is education. These findings need a physician, not a protocol. If any of these show up on your panel, book an appointment rather than adjusting a supplement — and take your actual lab report with you.
📖 How to read a lab report
The vocabulary that makes your results make sense.
🧮 Bloodwork calculators
The numbers your lab report doesn't calculate for you — but that carry more information than most of the values printed on it. Enter your results below.
Most of these need two or three markers to work. If you don't have them yet, the panels below include the combinations these calculators actually run on.
See which panels cover them →📋 Before you get tested
Most "weird" lab results aren't disease — they're preparation errors. Follow these and your numbers will actually mean something.
Pick the panel built around what you're actually trying to find out — each names the exact markers, why each one is on the list, and the draw timing specific to it.
Find your panel →🔄 Unit converter (US ↔ SI)
Most of the world reports in SI units, while nearly all online advice uses US units. Convert either direction so you can actually compare your results to what you read.
Testosterone. US ng/dL, most of the world nmol/L — and the numbers look nothing alike. A perfectly normal 500 ng/dL is 17.3 nmol/L. People read a US forum, see their own 17 next to someone's 500, and conclude they're severely hypogonadal when they're mid-range.
Glucose. mg/dL vs mmol/L, roughly an 18× difference. A fasting 90 mg/dL is 5.0 mmol/L. This one is usually obvious, but it catches people converting an HbA1c target into a glucose target.
Vitamin D. ng/mL vs nmol/L, a 2.5× difference. 30 ng/mL is 75 nmol/L. Someone reading "aim for 75" in one unit and having 40 in the other can badly over-supplement.
Oestradiol. pg/mL vs pmol/L, about 3.67×. Matters most for men on TRT reading advice written in the other unit, where the whole argument turns on a narrow range.
Converting isn't the same as comparing. Two labs can report the same unit and still disagree, because they run different assays — that's why sensitive oestradiol and standard oestradiol aren't interchangeable in men, and why a "calculated" free testosterone doesn't match an equilibrium dialysis one. The cleanest way to track anything over time is the same lab, same assay, same timing.
Converting units lets you line the numbers up, but assays differ too. If a value looks wildly different from last time, suspect the method before you suspect your body.
Find your panel →⚠️ What skews your results
Before you panic about a number — or change a protocol because of it — check whether one of these caused it. Most "abnormal" results are interference, not disease. A supplement you took that morning, the time of your draw, a hard workout the day before, or being dehydrated can all move a marker far enough to look like a problem.
The distinction that matters: some interference means the number is simply wrong and you should repeat the test. Some means the number is real but reflects a moment rather than your baseline. Those need opposite responses, so every entry below tells you which it is.
Then it's worth investigating properly rather than retesting the same single marker. These panels put the suspicious value in context with everything that explains it.
Find the panel for your situation →🧩 Pattern decoder
Single markers tell you a little. Combinations tell you the story. These are the patterns that explain what a lone value never will — each one links to the panel that confirms it.
❓ Frequently asked
Start from the problem rather than the marker list. 64 panels, each built around a specific situation, with the markers and the reasoning spelled out.
Find your panel →🩸 Start here — expert-built panels
Don't want to pick markers one by one? These are Marek's ready-made panels — draw fee included, prices before your automatic 10% off. For something built around a specific situation, see all 64 panels →
You're viewing the free preview. Members unlock every marker — optimal ranges, root causes and the full correction protocol for all .
And The Bloodwork Protocols. The Vault tells you what your markers mean. The Protocols tell you what to do about them — evidence-graded A to D, one problem at a time, including the popular things graded ✗ because the evidence is against them.
Unlock the full vault →