The quantified-self wave, once a fringe hobby of Silicon Valley engineers, has gone mainstream, with searches for "longevity test" and "biological age" growing year over year across Europe.
Yet, for all the cultural momentum behind the movement, most people who call themselves biohackers are doing it blind. They are taking NMN, optimising sleep scores, adjusting protein intake, and stacking supplements, without ever measuring the biomarkers that would tell them whether any of it is working, or whether it is even necessary.
The irony is sharp. The entire philosophy of the longevity movement: test; measure; intervene; retest, collapses the moment you skip the first step. You cannot optimise a system you have never measured. And measuring it properly requires knowing which markers actually correspond to healthspan, not just which ones your GP orders when something seems wrong.
This article maps the five clusters of biomarkers that a genuine longevity panel covers, explains the evidence behind each, and addresses the practical question European biohackers face: where do you actually get this done, at a credible standard, without flying to a US longevity clinic or paying $499 for a service that doesn’t operate outside America?
Simply put, chronological age is how long you have been alive. Biological age is how your body is actually performing relative to that number, and research consistently shows the two can diverge by a decade or more in either direction.
A 2024 paper in Nature Medicine by Moqri et al. from Harvard and Stanford reviewed the current state of aging biomarker validation, finding that the most robust tools combine conventional blood markers with emerging approaches like DNA methylation clocks. The key finding: measurable blood biomarkers track meaningfully with biological aging trajectories, and many of the most predictive ones are available in a standard laboratory blood draw today.
An international expert consensus published in The Journals of Gerontology in 2025 identified hs-CRP, IGF-1, and GDF-15 among the biomarkers with the strongest consensus (70–98% agreement among panel members) for use in human aging intervention studies. These are not exotic markers. They are measurable, reproducible, and clinically validated. They are also, notably, absent from most standard blood panels. Our article on biological age testing explores this distinction in depth.
Germany’s healthcare system is well-designed for what it was built to do: detect clinical disease in already symptomatic patients. The two most popular tests are as follows. The Check-up 35 that every individual can take tests five values: cholesterol; glucose; and a combined urine panel. The großes Blutbild adds differential white blood cell counts to a basic haematological picture. Neither touches metabolic risk, hormonal trajectory, inflammatory load, or cardiovascular particle counts. We mapped exactly what the großes Blutbild does and doesn’t test in detail.
This is the structural gap that the longevity movement exists to fill. Not because the system is broken, it is doing its intended job, but because “not clinically ill” and “biologically optimised” are entirely different standards, and the existing infrastructure only measures one of them.
A genuine longevity panel covers five clusters. Each addresses a distinct biological pathway that research has linked to accelerated or decelerated aging. Taken together, they produce a functional baseline. A map of where your biology currently sits, and what deserves attention before symptoms arrive.
Chronic low-grade inflammation is arguably the most important single concept in modern longevity medicine. The term inflammaging, coined to describe the persistent, low-level inflammatory state that accumulates with age, has become a cornerstone of biological aging research. It underlies cardiovascular disease, metabolic dysfunction, neurodegeneration, and multiple cancers. It is entirely invisible without a blood test.
hs-CRP (high-sensitivity C-reactive protein) is the primary clinical tool for measuring it. Unlike standard CRP, which detects acute inflammation, hs-CRP is sensitive enough to capture chronic, subclinical inflammation. The thresholds that matter: under 1.0 mg/L indicates low risk; 1.0–3.0 mg/L is moderate; above 3.0 mg/L is elevated.
The well-known longevity influencer Bryan Johnson has publicly described eliminating all measurable systemic inflammation as one of his primary protocol goals, with his hs-CRP falling below detectable levels. That represents one end of the optimisation spectrum. The starting point, for most people, is simply knowing where they are.
Homocysteine is the second critical inflammatory marker — and the most consistently under-tested one. It is an amino acid produced during protein metabolism, and when it accumulates (typically because of B vitamin deficiency or genetic MTHFR variants), it damages the arterial lining and drives atherosclerosis. A meta-analysis of 23,623 subjects published in PMC found that elevated homocysteine was an independent predictor of cardiovascular mortality, with each 5 µmol/L increment in homocysteine associated with a 52% higher risk of coronary heart disease mortality. The optimal target is below 10 µmol/L; most lab reference ranges accept up to 15 µmol/L or higher — a gap that leaves considerable risk invisible.
The important nuance: homocysteine is largely correctable. Targeted B vitamin supplementation: methylfolate; methylcobalamin; P5P, often normalises levels within weeks. But you cannot target what you have not measured.
If you have never had hs-CRP and homocysteine tested together, you do not know your inflammatory baseline. Aniva’s panel tests both as standard — alongside 100+ other markers — for €199 per year. Join the waitlist →
The standard metabolic test, fasting glucose, is a late-stage signal. It catches diabetes that has largely already arrived. What it misses is the decade-long process that precedes it: insulin resistance, the state in which cells progressively lose their sensitivity to insulin’s signal, forcing the pancreas to compensate with higher and higher output.
During this compensation phase, fasting glucose looks normal. HbA1c, the three-month blood sugar average, looks normal. But fasting insulin is already elevated, and with it comes a cascade of downstream effects: fat storage, particularly visceral and abdominal; chronic inflammation; hormonal disruption (elevated insulin suppresses SHBG, increasing androgen exposure); and progressive damage to endothelial cells.
The three markers that together capture the full metabolic picture:
None of these appear on the German Check-up 35. For anyone following a longevity protocol: tracking macros; experimenting with fasting windows; adjusting carbohydrate intake, running this cluster annually is the minimum viable metabolic feedback loop. Without it, you are adjusting variables in a system you cannot read.
Total testosterone is what most labs report. Free testosterone, the small fraction that is not bound to proteins and therefore biologically available to cells, is what the body actually uses. The difference matters because SHBG (sex hormone-binding globulin) captures up to 98% of circulating testosterone, rendering it inert. A person with “normal” total testosterone and elevated SHBG can have the functional hormonal profile of someone who is genuinely deficient, with the full symptom picture: fatigue, reduced recovery, low libido, mood instability — while being told their results are fine.
What raises SHBG? Caloric restriction. Extended fasting. Liver stress. Chronic low-grade inflammation. In other words: many of the same interventions popular in the biohacking community can, paradoxically, reduce free hormone availability if baseline is not monitored. Our article on cortisol explores related hormonal interactions including the DHEA-cortisol axis.
DHEA-S (the sulphated form of dehydroepiandrosterone) is the most abundant steroid hormone in circulation, and one of the most overlooked in standard medicine. Adrenal DHEA production begins declining from approximately age 25, reaching levels roughly 80% lower than peak by age 75. DHEA-S serves as a precursor for both testosterone and oestrogen, and its trajectory mirrors the biological ageing process more closely than almost any other single hormone. For anyone interested in understanding where they sit on the hormonal ageing curve, a DHEA-S reading, and its trend over time, provides information that no supplement stack replicates.
IGF-1 (insulin-like growth factor 1) is central to cellular growth and repair. The international biomarker consensus study identified it as one of the highest-consensus aging markers, with 98% expert agreement on its relevance. In longevity medicine, optimal IGF-1 is typically considered to sit in the middle range, roughly 120–180 ng/mL, rather than maximised. The reason: IGF-1 drives cellular proliferation, which is useful for tissue repair but may, at high levels, promote growth of nascent tumour cells. The goal is not maximisation but calibration.
Testosterone (total and free), SHBG, DHEA-S, and IGF-1 are all included in Aniva’s standard panel. One blood draw. Clinician-reviewed results. Apply for membership →
The standard lipid panel: total cholesterol; LDL-C; HDL-C; triglycerides, has been the cornerstone of cardiovascular risk assessment for decades. It is also, by the standards of longevity medicine, woefully incomplete.
The issue with LDL-C is that it measures the weight of cholesterol in LDL particles, not the number of particles. Two people can have identical LDL-C readings with entirely different cardiovascular risk profiles, depending on whether their LDL particles are large and buoyant (lower risk) or small and dense (higher risk). The European Society of Cardiology’s 2021 prevention guidelines elevated ApoB, which directly counts the number of atherogenic particles — as the preferred marker for lipid-related cardiovascular risk assessment.
The truck analogy is useful: LDL-C tells you the total weight of goods being transported; ApoB counts the number of trucks making trips through your arterial walls. Ten trucks with a light load each still make ten trips. It is the traffic, not just the cargo weight, that drives plaque formation. Our detailed article on ApoB, Lp(a), and the full cardiovascular marker picture covers this in depth.
Lp(a), lipoprotein(a), is the second critical marker that standard panels miss entirely. Roughly 20% of Europeans carry genetically elevated Lp(a), a particularly atherogenic lipoprotein that is largely unresponsive to lifestyle interventions. It is a fixed genetic risk, and most people who carry it have never been told. A single lifetime measurement establishes whether Lp(a) needs to be factored into cardiovascular risk planning.
Optimising performance on a depleted nutritional foundation is like tuning a car engine while running it on contaminated fuel. Four micronutrient markers are non-negotiable in a genuine longevity panel.
Vitamin D, technically a hormone, governs over 1,000 gene expression pathways including immune function, calcium metabolism, and thyroid signalling. The Robert Koch Institut’s DEGS1 study found that 56% of adults in Germany have vitamin D levels below 50 nmol/L, a figure that rises sharply through winter months. Supplementing without testing is guesswork: the same 2,000 IU daily dose will land two individuals at entirely different serum levels depending on absorption, baseline status, and cofactor availability. Our article on vitamin D in Northern Europe covers the evidence on deficiency rates, optimal ranges, and the K2 cofactor question.
Magnesium is involved in over 300 enzymatic reactions including ATP production, DNA repair, and cortisol regulation. It is also the mineral most depleted by chronic stress. Standard serum magnesium captures only 1% of the body’s total magnesium and is a poor proxy for cellular sufficiency; testing alongside clinical symptoms provides context that a number alone cannot.
Vitamin B12 is essential for neurological function, red blood cell formation, and homocysteine metabolism. It is particularly relevant for anyone following a plant-based or reduced-animal-protein diet, and critical context for homocysteine interpretation, since B12 deficiency is one of the primary drivers of elevated homocysteine.
Ferritin, iron stores, is the most consistently under-tested marker in European fatigue. You can have near-optimal haemoglobin with critically depleted ferritin, and experience the full cognitive and physical consequences of iron deficiency while being told your blood count is normal. A French RCT showed that iron supplementation reduced fatigue by nearly 50% in non-anaemic women with ferritin below 50 µg/L. Optimal is 50–100 µg/L; most lab reference ranges begin at 12 µg/L. Our article on iron and ferritin covers this in full.
Aniva’s annual membership tests 100+ biomarkers at an ISO 15189-certified German laboratory, covering all five clusters: inflammation (hs-CRP, homocysteine), metabolic health (fasting glucose, HbA1c, fasting insulin, HOMA-IR), hormonal trajectory (testosterone total and free, SHBG, DHEA-S, IGF-1, cortisol), cardiovascular risk (ApoB, Lp(a), full lipid panel), and micronutrient status (vitamin D, magnesium, B12, folate, ferritin, zinc). Results are clinician-reviewed. Cost: €199 per year.
The panel designed for Europe’s longevity-focused individuals. One draw. Clinician review. 100+ markers. €199 per year — less than a single private GP consultation. Join the free waitlist → See the full biomarker list →
The panel is the beginning, not the end. A good practical protocol for someone starting out is likely to establish a baseline before changing anything. Then make one or two targeted changes based on what the results show. Retest the relevant markers in six to twelve months. Compare the trend, not just the number.
This is what separates longevity-oriented testing from standard medical testing. It is not about detecting disease. It is about measuring trajectory, tracking the direction of travel across the biomarkers that research links to healthspan, and adjusting course based on data rather than guesswork.
The supplement industry will always have something to sell you. The underlying question, whether any of it is moving the needle in your body, can only be answered by one thing. A test.
[1] Peng H, Man C, Xu J, Fan Y. “Elevated homocysteine levels and risk of cardiovascular and all-cause mortality: a meta-analysis of prospective studies.” Journal of Zhejiang University Science B. 2015. PMC4288948
[2] Visseren FLJ, et al. “2021 ESC Guidelines on cardiovascular disease prevention in clinical practice.” European Heart Journal. 2021;42(34):3227–3337. Oxford Academic
[3] Moqri M, Herzog C, Poganik JR, et al. “Validation of biomarkers of aging.” Nature Medicine. 2024;30(2):360–372. PMC11090477
[4] International Expert Consensus on Biomarkers of Aging. “Expert consensus statement on biomarkers of aging for use in intervention studies.” The Journals of Gerontology: Series A. 2025. Oxford Academic
[5] Rabenberg M, et al. “Vitamin D status among adults in Germany — results of the German Health Interview and Examination Survey for Adults (DEGS1).” BMC Public Health. 2015;15:641.
[6] Nygård O, et al. “Plasma homocysteine levels and mortality in patients with coronary artery disease.” New England Journal of Medicine. 1997;337:230–236. NEJM
[7] Vaucher P, et al. “Effect of iron supplementation on fatigue in nonanemic menstruating women with low ferritin.” CMAJ. 2012;184(11):1247–54.
[8] Function Health pricing and availability. functionhealth.com. Accessed March 2026.
This content is for informational purposes only and is not medical advice. Longevity biomarker ranges discussed in this article reflect research on optimisation goals and may differ from standard clinical reference ranges. Always discuss results and any interventions with a qualified healthcare professional before making changes to your health regime.
