How to Choose a Longevity Clinic: 10 Criteria You Must Evaluate

A longevity clinic is a medical center that combines advanced diagnostics, evidence-based treatments, and personalized follow-up to optimize your healthy life expectancy (healthspan). But the market has grown so fast — estimated at $29.77 billion in 2025, projected to reach $46.86 billion by 2031 (Mordor Intelligence, 2026) — that the gap between the best clinics and the worst is enormous. Knowing what to look for before investing your time and money is not optional: it's what separates a real medical intervention from an expensive treatment with little impact.

In 2025, an article published in the journal Aging (Maier et al., 2025) flagged exactly this problem: "many clinics adopt unproven or risky therapies, exotic supplements and intravenous cocktails with minimal validation." The authors called for clearer regulatory frameworks and genuine integration with academic research. This article applies the same logic, but from your perspective as a patient: what questions to ask, what signals to watch for, and how to tell a trustworthy clinic from a marketing operation.

1. Specialized medical team, not just wellness coaches

The first distinction is straightforward: who makes the clinical decisions? A serious clinic has physicians trained in internal medicine, endocrinology, preventive cardiology, or functional medicine who sign the protocols and oversee treatments. Wellness coaches, nutritionists, and personal trainers play an important role, but they do not replace medical judgment.

Concrete question: How many full-time physicians does the clinic have, and what are their specialties? If the answer is vague or focuses on "holistic therapists," be cautious. Maier et al. (2025) document that many clinics operate as wellness providers to avoid strict regulatory oversight, allowing them to offer interventions that would not withstand hospital ethics board review.

For reference: Progevita works with over 50 medical professionals, including internists, endocrinologists, and integrative medicine specialists such as Dr. Vivian Borroto, an international reference in medical ozone therapy.

2. Biomarker-based diagnostics, not guesswork

Longevity medicine is built on measuring before intervening. Longevity biomarkers provide objective data about your current health status and future risks. Without them, any recommendation is generic.

The minimum you should expect:

• Body composition (DEXA or advanced bioimpedance) — weight alone is not enough
• Complete metabolic panel — HbA1c, fasting insulin, advanced lipid profile with ApoB
• Inflammation markers — hsCRP at minimum, ideally suPAR or IL-6
• Cardiorespiratory fitness — VO2max, the most powerful mortality predictor per Mandsager et al. (JAMA Network Open, 2018, PMID: 30382293)
• Functional strength — grip strength, associated with all-cause mortality (Leong et al., Lancet, 2015, PMID: 25982160)
• Hormonal profile — thyroid, testosterone/estradiol, cortisol, DHEA-S

The most advanced clinics add epigenetic clocks (GrimAge, DunedinPACE) to calculate your biological age and measure your real rate of aging. If a clinic doesn't measure any of this and prescribes supplements or IVs directly, the approach is not personalized — it's a generic package with a premium label.

3. Science-backed treatments, not evidence-free trends

This is where the sector diverges the most. Some clinics offer treatments backed by clinical trials published in peer-reviewed journals. Others sell experimental therapies without sufficient safety data — unregulated stem cell injections, unapproved peptides, or intravenous cocktails designed to impress more than to work.

Key question: For each treatment offered, can they cite at least one published clinical trial?

Examples of treatments with solid evidence:

Treatment	Evidence	Key reference
NAD+ therapy	Documented blood NAD+ elevation, improved metabolic biomarkers	Yi et al., J Nutr Biochem 2023 (meta-analysis, PMID: 36395395)
Medical ozone therapy	Immune modulation, inflammation reduction, musculoskeletal pain	Madrid Declaration ISCO3 (2020); Elvis & Ekta, J Nat Sci Biol Med 2011 (PMID: 22470233)
Membrane plasmapheresis	Removal of inflammatory proteins, tissue rejuvenation in animal models	Mehdipour et al., Aging 2020 (PMID: 32474458)
Mediterranean diet-based nutrition	30% reduction in cardiovascular events	Estruch et al., NEJM 2018 (PMID: 29897866)
Exercise program with VO2max	Elite fitness = 5× lower mortality risk vs low fitness	Mandsager et al., JAMA Netw Open 2018 (PMID: 30382293)

Not every treatment needs Level I evidence (large randomized trials). But they do need a published rational basis, safety data, and medical supervision. When something sounds too good to be true, ask for the reference. If they don't have one, that's your signal.

4. Post-stay follow-up: the 12-month plan

A 4-to-7-day stay at a clinic can be the starting point, but the real change happens in the months that follow. Look for clinics that offer:

• A personalized action plan for the 12 months after your stay
• Follow-up teleconsultations with the medical team
• Repeat biomarker testing at 3, 6, and 12 months to measure progress
• Adjustment of interventions based on individual response

If the clinic sends you off on your last day with a generic PDF and you never hear from them again, the model is luxury hospitality with a medical veneer. The real value of longevity medicine is iteration: measure, intervene, re-measure, adjust.

At Progevita, every patient leaves with a structured 12-month plan and access to follow-up teleconsultations with the medical team that treated them — not a call center.

5. Price transparency

The longevity market has a brutal price range. According to data published by Maier et al. (2025) in their review of international clinics:

Clinic type	Indicative range	What's typically included
Diagnostics-only (no accommodation)	$5,000 – $15,000	Imaging, blood work, genomics, report
Integrated mid-range program	$500 – $1,500/night	Accommodation + meals + diagnostics + treatments + follow-up
Premium/luxury clinic	$3,000 – $8,000/night	All of the above + luxury hospitality services

What matters is not how much it costs, but what you get for what you pay. Useful questions:

• Does the price include all diagnostic tests or are they billed separately?
• Are treatments included or are they extras?
• Does the follow-up program have additional costs?
• Are there hidden costs for "recommended packages" during the stay?

Progevita offers complete programs from €2,100 (accommodation, 3 daily meals, medical consultations, diagnostics, treatments, and follow-up plan included) and individual treatments starting at €48. We publish our prices because we believe transparency is a marker of trust.

6. Real clinical facilities, not a hotel with a visiting doctor

There's a difference between a wellness resort that invites a physician once a week and a clinic with its own medical infrastructure. Look for:

• Do they have an on-site laboratory or send samples elsewhere?
• Do they have diagnostic equipment (bioimpedance, spirometry, VO2max, ultrasound)?
• Are treatments administered in clinical rooms with healthcare staff?
• Is a physician on call during your entire stay?

The environment matters for recovery — there is evidence that exposure to nature improves health outcomes (Ohly et al., J Toxicol Environ Health B, 2016, PMID: 27668460; Bratman et al., Science Advances, 2019) — but natural surroundings do not replace medical infrastructure. The best clinics combine both: nature and medicine.

Progevita operates at the Balneario de Cofrentes: 200 hectares of natural volcanic parkland with thermal waters at 40°C, but with its own clinical facilities, laboratory, diagnostic equipment, and permanent healthcare staff.

7. Specialization, not generalism

Be cautious of clinics that do "everything": cosmetic surgery, fertility, longevity, spa, life coaching, and spiritual retreats under one roof. Longevity medicine requires deep knowledge of aging biology, biomarkers, evidence-based interventions, and longitudinal follow-up. It is not a menu add-on.

Question: Is longevity the clinic's primary focus or is it one more service within a generic offering?

Leading clinics in the sector (Fountain Life, Human Longevity Inc, Progevita, Cenegenics) have longevity as their central axis. This allows them to invest in continuous team training, protocols updated with the latest evidence, and relationships with the research community.

8. Personalized program, not a one-size-fits-all package

The 12 hallmarks of aging affect each person differently. A 55-year-old man with insulin resistance and low testosterone needs a different approach than a 48-year-old woman in perimenopause with elevated inflammation. Personalization is not a luxury: it's what distinguishes precision medicine from marketing.

A useful framework published in Aging and Disease (Moskalev et al., 2025) proposes that every longevity clinic should have an "Analytical Center" that processes each patient's data individually: biomarkers, wearables, clinical history, genetics, and lifestyle. The result should be a personalized health profile, not a pre-set treatment menu.

In practice, ask:

• Are treatments decided after seeing my results or are they pre-set in the "package"?
• Is there a medical consultation before starting any intervention?
• Is the program adjusted during the stay if results warrant it?

9. Connection with scientific research

The world's best clinics do not operate in isolation from science. They participate in studies, publish data, collaborate with universities or research centers, and attend sector conferences. This is not an academic indulgence: it's what ensures protocols are updated with the latest evidence rather than frozen in what worked five years ago.

Maier et al. (2025) note that the disconnect between clinics and academia creates "a vicious cycle where scientists dismiss clinics as pseudoscientific, and clinics dismiss scientists as too conservative." The clinics that break this cycle are the ones generating real data and sharing it.

Positive signals: the clinic has organized or participated in international conferences, collaborates with published researchers, its physicians present at conferences or actively review scientific literature. Progevita, for example, hosted the Longevity Biotech Fellowship 7 (LBF7) in 2025, with researchers including Aubrey de Grey.

10. Location and therapeutic environment

Although the quality of the medical team and protocols matters more than location, the environment is not irrelevant. Attention Restoration Theory (ART), systematically reviewed by Ohly et al. (2016, PMID: 27668460), demonstrates that exposure to natural environments improves cognitive function, reduces stress, and supports recovery. A meta-analysis by Bratman et al. (Science Advances, 2019) with data from over 140 studies confirmed that nature contact reduces cortisol, heart rate, and blood pressure.

This does not mean an urban clinic is worse by definition. But if you can choose, a natural setting during a multi-day stay amplifies the results of the interventions. Climate also matters: vitamin D produced by moderate sun exposure is associated with immune function, bone health, and inflammatory regulation.

Progevita is located in the interior of the Valencia region: 200 hectares of natural parkland, volcanic thermal waters, 2,660 hours of sunshine per year (AEMET), and an average annual temperature of 18.4°C. It's not scenery — it's part of the protocol.

Quick checklist: the 10 questions to ask before choosing

#	Criterion	Ask the center	Red flag
1	Medical team	How many full-time physicians do you have?	Only coaches or therapists without medical degrees
2	Diagnostics	What biomarkers do you measure before intervening?	They don't measure anything or only basic blood work
3	Evidence	Can you cite published studies for each treatment?	Vague answers or appeals to "clinical experience"
4	Follow-up	What plan do you offer for the 12 months after?	Service ends when you walk out the door
5	Pricing	What exactly does the price include? Any extras?	Opaque pricing or only "from" without breakdown
6	Facilities	Do you have your own lab and diagnostic equipment?	Everything outsourced or no clinical infrastructure
7	Specialization	Is longevity your primary activity?	It's one more service among spa, aesthetics, and coaching
8	Personalization	Are treatments decided after my results?	Identical packages for every patient
9	Research	Do you collaborate with research centers or publish data?	No connection to the scientific community
10	Environment	Is the setting integrated into the therapeutic program?	Only visual marketing with no clinical use of the environment

The cost of choosing poorly

Choosing poorly doesn't just mean losing money. It means losing time — a resource that is especially valuable in longevity medicine, because preventive interventions are more effective the earlier they are applied. The average annual cost of managing a chronic disease in Spain exceeds €1,950 per patient (Ministry of Health). Type 2 diabetes, a condition preventable in most cases, accumulates an estimated lifetime cost of €100,000 per patient (IDF Diabetes Atlas, 2024).

A well-chosen longevity clinic is not an expense: it's the investment that avoids those future costs, both financial and in quality of life.

Frequently asked questions

References

1. Maier AB, et al. Longevity clinics: between promise and peril. Aging. 2025;17(1) (DOI: 10.18632/aging.206330).
2. Moskalev A, et al. A Framework for an Effective Healthy Longevity Clinic. Aging and Disease. 2025;16(4):1971 (DOI: 10.14336/AD.2024.0328-1).
3. Mandsager K, et al. Association of Cardiorespiratory Fitness With Long-term Mortality. JAMA Network Open. 2018;1(6):e183605 (PMID: 30382293).
4. Leong DP, et al. Prognostic value of grip strength: findings from the Prospective Urban Rural Epidemiology (PURE) study. Lancet. 2015;386(9990):266-273 (PMID: 25982160).
5. Estruch R, et al. Primary Prevention of Cardiovascular Disease with a Mediterranean Diet. NEJM. 2018;378(25):e34 (PMID: 29897866).
6. Yi L, et al. The efficacy and safety of NMN supplementation in clinical studies: a systematic review and meta-analysis. J Nutr Biochem. 2023;115:109295 (PMID: 36395395).
7. Mehdipour M, et al. Rejuvenation of three germ layers tissues by exchanging old blood plasma with saline-albumin. Aging. 2020;12(10):8790-8819 (PMID: 32474458).
8. Ohly HP, et al. Attention Restoration Theory: A systematic review of the attention restoration potential of exposure to natural environments. J Toxicol Environ Health B. 2016;19(7):305-343 (PMID: 27668460).
9. Bratman GN, et al. Nature and mental health: An ecosystem service perspective. Science Advances. 2019;5(7):eaax0903.
10. López-Otín C, et al. Hallmarks of aging: An expanding universe. Cell. 2023;186(2):243-278 (PMID: 36599349).
11. Lu AT, et al. DNA methylation GrimAge strongly predicts lifespan and healthspan. Aging. 2019;11(2):303-327 (PMID: 30669119).

This article is for informational purposes and does not replace individual medical advice. To design a longevity plan tailored to your profile, consult a qualified healthcare professional.

Want to evaluate your health with real biomarkers? Request a personalized assessment at Progevita — Balneario de Cofrentes, Valencia, Spain.