Blood markers, biomarkers and supplements, explained clearly

Which blood markers should you measure regularly?

There is no universal list, but some markers offer the greatest practical benefit for most people. A sensible selection covers four areas: metabolism, cardiovascular profile, inflammation and nutrient status.

For metabolism, HbA1c shows your average blood sugar over the past eight to twelve weeks. For the cardiovascular profile, ApoB and Lp(a) complement the classic lipid panel of cholesterol, HDL, LDL and triglycerides. For inflammation, CRP sensitiv is the single most informative value. Among nutrients, Vitamin D, Ferritin, Vitamin B12 and magnesium are the ones where an insufficient supply is common and readily correctable.

What matters is less the number of markers than their selection. A marker is worth measuring when a concrete recommendation follows from it. Values that barely change, or from which nothing can be derived, do not need regular testing.

On frequency: a full annual measurement is enough for most people. Markers that respond quickly to diet, exercise or supplements are worth rechecking after three to six months.

Which blood markers should everyone over 40 have measured?

From around 40, the priorities shift. Metabolism slows, the cardiovascular profile gains importance, and an insufficient nutrient supply carries more weight.

Particularly informative at this stage are ApoB and Lp(a) for the cardiovascular profile, HbA1c for long-term metabolic balance and CRP sensitiv for silent inflammatory processes. Add Vitamin D, which is often suboptimal at our latitudes, and Ferritin as the iron store, especially relevant with persistent exhaustion. Liver and kidney values belong in as a baseline, because they show how well the eliminating organs are working.

Lp(a) is a special case: the value is largely genetically determined, so a single measurement in a lifetime is usually enough.

This does not replace medical check-ups. It complements them with a functional perspective: not only whether something is diseased, but whether something could work better.

How often should you measure Vitamin D?

For most people, once or twice a year is enough. A measurement at the end of winter is especially informative, because levels are typically at their lowest then.

If you supplement, measure again after about three months. Vitamin D responds comparatively quickly to intake, so a retest after a quarter reliably shows whether the chosen dose fits.

What gets measured is 25-OH Vitamin D, the storage form. It reflects your supply status better than the active form. At our latitudes many people sit in the suboptimal range, especially between October and March, because sunlight is then insufficient for the body to produce it.

Can you interpret blood markers yourself?

Partly. Whether a value sits inside the reference range can be read off the lab report. It gets harder with the three questions that actually matter.

First, a reference range is not the same as an optimal range. Reference values describe what is measured in the majority of a comparison group, not what is functionally desirable. A value can sit within range and still have room for improvement.

Second, individual values say little. A ferritin value of 40 means something different if CRP sensitiv is elevated at the same time, because ferritin also responds to inflammation. Values have to be read in context.

Third, the context is missing. Age, sex, diet, medication, training load and symptoms change the interpretation considerably.

That is why at EVER Precision a real expert reviews every analysis before it becomes a plan. For out-of-range values you do not get a supplement plan but a clear note to have it checked by a doctor.

What does ApoB mean?

ApoB stands for apolipoprotein B, a protein on the surface of the lipoproteins that transport cholesterol and other fats through the blood. There is exactly one ApoB molecule per transport particle.

That is what makes the value interesting. While LDL measures how much cholesterol is being transported, ApoB counts how many particles are in circulation. Two people can have the same LDL value and still carry a different number of particles. This is why ApoB is considered a particularly informative marker for the cardiovascular profile, often more precise than LDL alone.

The value responds well to diet, exercise and, where needed, medically supervised measures. At EVER Precision, ApoB is part of the standard panel and is measured again at the six-month retest, so you can see whether anything has moved.

What does Lp(a) mean?

Lp(a), spoken lipoprotein little a, is a lipoprotein whose concentration is largely genetically determined. Unlike LDL, it is barely influenced by diet or lifestyle.

That is precisely what makes it valuable. It adds information to the cardiovascular profile that other lipid values do not provide. Because Lp(a) practically does not change over a lifetime, a single measurement is usually sufficient.

An elevated value does not mean nothing can be done. It shifts the priorities: modifiable factors such as ApoB, blood pressure, exercise and diet then carry more weight. An out-of-range Lp(a) value belongs in medical hands for interpretation.

What is CRP sensitiv?

CRP sensitiv, often called hs-CRP, is a high-sensitivity inflammation marker. Classic CRP indicates acute inflammation, for example during an infection. The sensitive variant measures far more finely and thereby reveals low-grade, silent inflammatory processes that would otherwise go unnoticed.

For interpretation it matters that the value responds to acute infections. If you have a cold on the day of measurement, you get an elevated value that says nothing about your normal state. That is why CRP sensitiv is always read in context and repeated when it is out of range.

Because the marker responds comparatively quickly, it is well suited to tracking over time. At EVER Precision it is included both in the annual panel and in the retest.

What does HbA1c tell you?

HbA1c is long-term blood sugar. The value shows the average blood sugar over the past eight to twelve weeks. Unlike a single fasting measurement it is robust, because it does not depend on whether you had breakfast on the morning of the blood draw.

That makes it well suited to observing metabolic balance over time. Because the value changes slowly, measuring every three to six months makes sense. Measuring more often adds no further insight.

Clearly elevated values belong in medical assessment, not in a supplement plan.

What does Ferritin mean?

Ferritin is the storage form of iron and shows how well iron reserves are filled. That is relevant for oxygen transport, energy and performance, and a common reason for persistent tiredness.

One particularity: ferritin also rises during inflammation. A normal or high ferritin value alongside an elevated CRP sensitiv can therefore mask an iron deficiency. This is exactly why both values are looked at together.

Very high values can indicate iron overload and belong in medical assessment. In that case, iron supplementation would be the opposite of helpful.

Which blood markers matter for longevity?

Longevity-oriented diagnostics looks less at acute signs of disease and more at factors that play out over decades. Four areas stand out.

For the cardiovascular profile, ApoB and Lp(a) are considered particularly informative, because they capture particle count and a genetically fixed additional factor. In metabolism, HbA1c shows how stable blood sugar regulation is over weeks. For inflammation, CRP sensitiv reveals chronic low-grade processes that are associated with ageing. And for nutrient status, Vitamin D, B12, Ferritin and magnesium matter, because a lasting insufficient supply strains many systems at once.

More important than any single value is the trajectory. A snapshot says little about whether things are moving in the right direction. This is why repeated measurement over years makes more sense than a single very broad panel.

How do I find out which supplements I actually need?

The most honest route runs through measurement rather than assumption. Three steps help.

First, establish your starting point. Without blood markers, every supplement decision remains a guess. Markers such as Vitamin D, Ferritin, B12 and magnesium show concretely where an insufficient supply exists.

Second, include the context. Diet, age, training load, sleep and symptoms change your requirements considerably. Someone eating a vegan diet carries a different B12 risk than someone who regularly eats meat.

Third, measure again after three to six months. Only then does it become clear whether the chosen dose works. Without a retest, even a well-intentioned plan remains an assumption.

What you do not need is a standard package that looks the same for everyone. Requirements differ considerably between individuals, and substances the body does not need bring no additional benefit.

How does personalised supplementation work?

Personalised supplementation means the selection and dosage come from your own data rather than from a general recommendation. In practice this runs in four steps.

Measure: collect blood markers, complemented by a questionnaire on diet, daily life, goals and symptoms.

Interpret: the values are read in context, not in isolation. An expert checks which findings are actually relevant.

Derive: from this comes a concrete plan with substance, dose, form and timing. Form and timing are not incidental, because they affect absorption.

Review: after three to six months you measure again and adjust the plan. The difference to a standard product lies mainly in this last step. Only the trajectory turns a recommendation into a verifiable strategy.

What is functional medicine?

Functional medicine asks less whether a value sits outside the reference range and more whether the underlying processes are working well. The focus is on connections between metabolism, diet, nutrient status, sleep, stress and exercise.

An example illustrates the difference. A Vitamin D value at the lower end of the normal range is medically unremarkable. Viewed functionally it can still be suboptimal, if exhaustion, frequent infections or little sun exposure come on top.

Functional medicine does not replace medical diagnostics or the treatment of illness. It complements them with a perspective geared towards optimisation and prevention.

What is preventive medicine?

Preventive medicine aims to avoid problems before they arise rather than treating them afterwards. Three levels are usually distinguished.

Primary prevention reduces risks while nothing is present, through diet, exercise, sleep and nutrient supply. Secondary prevention detects findings early, for example through regular measurement, while they are still readily modifiable. Tertiary prevention limits the consequences of an existing illness, and that belongs in medical hands.

Regular biomarker measurement sits mostly in the first two levels. Its value lies in making developments visible while course-correcting is still easy. This is why the trajectory over years is more informative than a single snapshot.