Longevity check-up: what to test and what to skip (more is not better)
Which tests make sense in a longevity check-up, which trigger false alarms, and why the value lies in the plan that follows, not the number of tests.
4 min readEducational content by RejuvelookUpdated in October 2026
In short
A good longevity check-up is not the one with the most tests but the one that measures what changes decisions: blood pressure, cholesterol with lipoprotein(a), glucose, weight, waist and your overall cardiovascular risk. Blanket health checks have not reduced mortality, and tests such as full-body MRI throw up many doubtful findings.
Key points
- A Cochrane review of over 250,000 people found that general health checks did not reduce mortality.
- A screening test only makes sense if it finds something important, in time, and acting on it improves the outcome.
- Cardiovascular risk, estimated with tools such as SCORE2, is what best guides prevention.
- Lipoprotein(a) is measured at least once in life, and a lipid profile no longer requires fasting.
- Full-body MRI finds incidental abnormalities in about a third of healthy people.
"Get a full check-up" sounds sensible. But a check-up with dozens of tests does not protect you more than a well-chosen one, and it can expose you to false alarms. This guide explains what is worth measuring and what is not, based on the evidence, for people who live in Spain or divide their time between Spain and home.
What a longevity check-up is
A standard check-up asks whether you are ill today. A longevity check-up asks what your risk of illness is over the coming years and what you can change now. Its value is not in the list of tests but in the medical interpretation and the plan that follows.
What the evidence says about check-ups
Here is an uncomfortable fact. A Cochrane review of 17 trials and over 250,000 people compared adults who were offered general health checks with adults who were not. The checks had little or no effect on overall, cardiovascular or cancer mortality [1].
That does not mean measuring is useless. It means measuring without judgement is. For decades, medicine has used a set of principles to decide what to screen for: the condition must be important, the test acceptable and reliable, an effective treatment must exist, and the benefit of early detection must outweigh the harms [2].
What is worth measuring
What best meets those principles is cardiometabolic risk:
- Blood pressure, in clinic and, if needed, at home.
- A lipid profile, which no longer needs fasting [6], with lipoprotein(a) at least once in life, because it is largely genetic and changes little [4].
- Glucose and HbA1c: the ADA recommends testing all adults from 35, and earlier with overweight and other risk factors [5].
- Weight, waist and, where possible, body composition.
- Smoking, activity, sleep and alcohol, which are asked about rather than measured in blood, and weigh as much as any number.
With those data, European prevention guidelines estimate your ten-year risk with SCORE2, or SCORE2-OP from 70, and decide when to act [3]. If something comes back raised, our guides to high cholesterol and prediabetes explain the next steps.
It is also worth keeping up to date with the cancer screening for your age and sex.
What not to do without a reason
Full-body MRI is the clearest example. A systematic review of over 5,000 people without symptoms found critical or indeterminate incidental findings in 32%. False positives were around 16%, and no study checked negative results beyond five years [7]. Each doubtful finding leads to more tests, sometimes invasive ones, and months of worry.
Much the same applies to tumour markers in healthy people, hormone panels without symptoms, or genetic tests without a family history to justify them. They have no place in a well-judged check-up.
What the evidence says
Each statement shows its level of evidence and the sources behind it.
Supported
With caveats
- General health checks in unselected adults have little or no effect on overall, cardiovascular or cancer mortality.[1]Moderate evidence
Not enough support
- Full-body MRI in people without symptoms: many incidental findings, frequent false positives and no data on long-term benefit.[7]Low-quality evidence
- Large panels of biological age markers or genetic screening without a clinical reason: not validated for decision-making.Experimental
How to prepare
A check-up is more useful if you arrive with your information in order:
- Previous blood tests and reports, even old ones: they show your trend and avoid repeat testing. English reports from home are fine.
- A list of your medicines and supplements, with doses.
- Specific family history: who, which condition and at what age.
- Home blood pressure readings, if you have a monitor, taken over several days.
- Your questions, written down. What worries you helps decide what to measure.
What to expect, realistically
A good check-up ends with a few clear conclusions: your risk, two or three priorities and when to measure again. If everything is fine, that is valuable information too, and the advice will be to keep your habits and space out reviews.
After the check-up
What happens next decides whether the check-up was worth it. An abnormal result is confirmed before it becomes a label: a single high glucose or cholesterol reading is not a diagnosis. If it is confirmed, a target and a date to measure again are set.
If everything is in order, that conclusion is useful too: keep doing what you are doing and do not repeat tests too soon. And if something turns up that belongs to another specialist, you are referred with a clear report in English or Spanish, so you do not have to start again from scratch.
Risks, and who it is not for
The risk of check-ups is overdiagnosis: findings that would never have caused trouble but lead to tests, treatment and anxiety. Nor is a check-up a substitute for seeing a doctor when you already have symptoms: then you need a targeted assessment, not a check-up.
How it works at Rejuvelook
We do not sell packages of tests. Assessing your cardiometabolic risk is part of our weight and metabolic health programme, online anywhere in Spain and in person in Fuengirola, in English or Spanish.
It starts with a medical video consultation. The doctor reviews your history and previous results, requests only what is missing at a lab near you, and estimates your risk. From there you get a plan with measurable priorities and regular reviews, with reports in English for your GP at home. For the wider picture, see what longevity medicine is.
When to see a doctor
Book a medical consultation, or go to A&E if it is severe or sudden, if you notice:
- New symptoms such as chest pain, breathlessness, bleeding or weight loss: do not wait for a check-up, see a doctor now.
- A family history of sudden death, heart attack or cancer at a young age: specific testing may be indicated.
- You are not up to date with the cancer screening for your age, such as bowel, breast or cervical screening.
- You have been told about an incidental finding on a scan and do not know what it means or what to do.
Frequently asked
What does the blood test include?
It depends on your history, but usually a lipid profile with lipoprotein(a) if you have never had it, glucose and HbA1c, and other tests only when there is a reason. The doctor explains why each one is requested.
Do I need to fast?
Not for cholesterol. For fasting glucose, yes. If the doctor requests both, the simplest option is an early-morning appointment before breakfast.
I had blood tests at home last year. Can I use them?
Yes, and it is ideal. Bring the reports in English: the doctor reads them, converts units where needed and avoids repeating recent tests.
How often should I repeat it?
There is no single answer. With low risk and stable numbers, less often; if there are factors to watch, or you are changing habits or treatment, sooner.
What about tumour markers in the blood test?
In people without symptoms they are not used for screening: they can be raised without cancer and normal with it, and lead to unnecessary tests. They are requested when there is a clinical reason.
Do you offer scans?
Not as general screening. If the doctor thinks an imaging test is warranted by your history or symptoms, you will be advised on where to have it.
Does it replace national screening programmes?
No, it complements them. If you are resident in Spain and registered with the public health system, you are entitled to its cancer screening programmes; if you split your time, make sure you are not falling between two systems.
References
Sources checked against PubMed or Crossref. Cited as plain text, without links.
- 1.Krogsbøll LT, Jørgensen KJ, Gøtzsche PC. General health checks in adults for reducing morbidity and mortality from disease. Cochrane Database Syst Rev. 2019;1(1):CD009009. doi: 10.1002/14651858.CD009009.pub3. PMID: 30699470.Verified on 2 October 2026
- 2.Andermann A, Blancquaert I, Beauchamp S, Déry V. Revisiting Wilson and Jungner in the genomic age: a review of screening criteria over the past 40 years. Bull World Health Organ. 2008;86(4):317-9. doi: 10.2471/blt.07.050112. PMID: 18438522.Verified on 2 October 2026
- 3.Visseren FLJ, Mach F, Smulders YM, Carballo D, Koskinas KC, Bäck M, et al. 2021 ESC Guidelines on cardiovascular disease prevention in clinical practice. Eur Heart J. 2021;42(34):3227-3337. doi: 10.1093/eurheartj/ehab484. PMID: 34458905.Verified on 2 October 2026
- 4.Kronenberg F, Mora S, Stroes ESG, Ference BA, Arsenault BJ, Berglund L, et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. Eur Heart J. 2022;43(39):3925-3946. doi: 10.1093/eurheartj/ehac361. PMID: 36036785.Verified on 2 October 2026
- 5.American Diabetes Association Professional Practice Committee. 2. Diagnosis and Classification of Diabetes: Standards of Care in Diabetes-2026. Diabetes Care. 2026;49(Supplement_1):S27-S49. doi: 10.2337/dc26-S002. PMID: 41358893.Verified on 2 October 2026
- 6.Nordestgaard BG, Langsted A, Mora S, Kolovou G, Baum H, Bruckert E, et al. Fasting is not routinely required for determination of a lipid profile: clinical and laboratory implications including flagging at desirable concentration cut-points-a joint consensus statement from the European Atherosclerosis Society and European Federation of Clinical Chemistry and Laboratory Medicine. Eur Heart J. 2016;37(25):1944-58. doi: 10.1093/eurheartj/ehw152. PMID: 27122601.Verified on 2 October 2026
- 7.Kwee RM, Kwee TC. Whole-body MRI for preventive health screening: A systematic review of the literature. J Magn Reson Imaging. 2019;50(5):1489-1503. doi: 10.1002/jmri.26736. PMID: 30932247.Verified on 2 October 2026
Educational content. It does not replace a medical consultation or provide a diagnosis. Tests and treatments are indicated only after medical consultation and in line with regulation.