Inside a Full Testing Week: What 181 Blood Markers Actually Reveal
Four longevity-minded creators sit down after a week of comprehensive testing — full-body MRI, DEXA, coronary calcium score, a 181-marker blood panel, posture assessment and more. Their shared conclusion: you cannot know what to measure until you have measured broadly once, and the value only appears when the results change what you do next.
Overview
This roundtable was recorded at the end of a week-long testing retreat, with clinical nutritionist Inka Galand, anti-aging physician Dr. Joy Kong, biohacker Dave Pasco and creator Adam joining Siim Land. The group compares what a genuinely broad screening package includes — full-body MRI, DEXA scan, coronary calcium score, VO2 max, grip strength, posture assessment and a 181-marker blood panel — and how differently that feels from collecting single tests over a year.
A recurring theme is that conventional care tends to wait for a diagnosis, while broad baseline measurement catches deviations long before anything is labelled. They discuss which markers carry more signal than most panels offer, why cystatin C says more about kidney function than creatinine alone, and why creatinine partly reflects muscle mass. Biological-age scoring comes up in detail, including the PhenoAge-style approach built on nine blood markers plus chronological age, and its honest limitations.
Bone density gets an extended segment: the group considers it one of the most underrated measurements, slow to change and therefore worth baselining early. The conversation then moves to skin — microneedling, polynucleotides, exosomes and stem cells — with the point that stimulating repair matters more than simply consuming collagen. It closes on eyes, cataracts, hyperbaric side effects, and the surprisingly central role of doing all this alongside supportive peers.
Key quotes
5The western medical system is not built on prevention. Oh, you're pre-diabetic — come back when you're full-blown diabetic.
You never really know what to test before you do this comprehensive testing.
Cystatin C is a better kidney marker. What creatinine shows is how much muscle you have.
You're not going to change your bone density in a week — it's going to take several months and years to significantly improve it.
Skin is like an organ, and we just eat collagen. There's not much growth or repair happening merely because of eating collagen.
Key ideas
9Prevention is not the default setting
The group's starting observation is that standard care is organised around treating established disease, not around catching drift early. Broad measurement is how you step outside that pattern.
Everything in two days beats a year of scheduling
Several participants admit they had access to these tests for years and still never did them, because each one requires a separate appointment. Compressing the whole battery into two days removed the friction entirely.
Posture assessment: the test nobody orders
Two of the group scoffed at the postural evaluation and then found real asymmetries — a spine leaning right, shoulders that could not reach the floor. In conventional settings you only get this after an injury.
Test broadly first, then test narrowly
Deviations begin long before a disease is named, so the only reliable way to know what to monitor is to measure widely once, see what is trending badly, and re-test that.
A 181-marker panel and what it covers
The panel spans blood sugar, immune and red blood cells, lipids, liver and kidney markers, iron, vitamins, minerals, heavy metals and hormones. Some markers add little in serum, but the breadth gives far more to work with.
Biological age clocks are useful, not exact
The PhenoAge-style score uses nine blood markers plus chronological age. Day-to-day glucose swings and the muscle-mass component of creatinine both distort it, and younger people face a mathematical ceiling.
Bone density is the underrated scan
DEXA remains the gold standard for bone density, and low density is a major driver of serious outcomes in older adults. Because it moves slowly, knowing your baseline after 30 is far more useful than discovering it late.
Loading patterns show up in your bones
One participant's spine measured about three standard deviations above normal from years of heavy squatting, while the hips sat only slightly above normal — a direct argument for training the sites you want to strengthen.
Repair needs a stimulus, not just raw material
Eating collagen alone produced no visible change over five years. Pairing micro-injury from microneedling with collagen, vitamin C and supporting amino acids is what moved the needle.
Practical takeaways
7- 1
Batch your testing 14:00
Book your scans and panels into a single concentrated block rather than one at a time. The barrier to testing is almost always scheduling, not cost or willingness.
- 2
Ask for a posture assessment 20:10
It is cheap, non-invasive and rarely offered. Knowing where your spine and shoulders actually sit gives you something specific to work on before it becomes pain.
- 3
Turn results into changes, or skip the test 26:20
Repeated testing with no behaviour change is wasted time and money. Decide in advance what you would do differently for each plausible result.
- 4
Read creatinine and cystatin C together 33:00
Creatinine alone conflates kidney function with muscle mass. If your panel offers cystatin C, it gives a cleaner read on kidney function.
- 5
Get a bone density baseline after 30 39:00
A DEXA scan is widely available and inexpensive in most large cities. Repeating it every few years is enough to see the trend.
- 6
Load the site you want to change 43:40
Bone responds locally. If the hips lag behind the spine, jumping, plyometrics and rebounding target that region specifically.
- 7
Support collagen, don't just swallow it 47:00
Combine a repair stimulus with the nutrients synthesis needs — vitamin C and amino acids such as proline — and go gently, starting mild rather than aggressive.
Topics & chapters
14Prevention versus treatment
The opening frame: conventional care waits for the diagnosis. The group sets up why they measure early instead.
Meet the group
A clinical nutritionist, an anti-aging physician, a biohacker and a creator introduce themselves and their angles on longevity.
An unplanned surgery and the cost gap
One participant's shoulder bone spurs get removed within days after months of refusal at home, and the group compares price and wait times.
The testing package
Full-body MRI, DEXA, coronary calcium score, food tolerance and a comprehensive blood panel — all completed in the first two days.
Posture assessment surprises everyone
The test they were most sceptical about turns up the most actionable findings about alignment and chest tightness.
How do you know what to test?
The case for measuring broadly once, identifying what is drifting, and then narrowing to the markers that matter for you.
The 181-marker blood panel
What the panel actually measures, which markers add real signal, and which serum values contribute little.
Biological age clocks
PhenoAge-style scoring on nine blood markers, why creatinine complicates it, and how the chronological component shapes results.
DEXA and bone density
Body composition versus bone density, why the latter is underrated, and how slowly it responds to training.
Trampolines, vibration plates and loading
Practical ways the group works on density, plus a discussion of research combining vibration with vitamin D and K.
Skin: microneedling and collagen induction
Why eating collagen alone did nothing for five years, and how micro-injury plus supporting nutrients changed the outcome.
Exosomes, stem cells and peptides
Dr. Joy Kong on why ongoing secretion of repair signals can outperform one-off treatments, and how she thinks about combinations.
Eyes, cataracts and hyperbaric
Comprehensive eye testing, blurry vision after frequent hyperbaric sessions, carnosine drops and regeneration research.
The social side of testing
Why going through results alongside supportive peers turns an intimidating process into a genuinely enjoyable one.