What does healthy aging mean?
The WHO defines healthy aging as developing and maintaining the functional capacity that enables well-being in older age. Functional capacity consists of the interaction between an individual’s physical and mental capacities and the environment they live in. Therefore, an individual with controlled chronic conditions can also be in a process of healthy aging with strong functionality, independence, and quality of life.
Are longevity and healthy aging the same thing?
As a word, longevity refers to a long life; in modern clinical use, however, it focuses not only on lifespan, but also on the years lived in good health. The healthy aging approach makes this goal more concrete: it is not only about “how many years one will live,” but how movement, cognition, independence, social participation, and quality of life will be preserved during these years.
What is biological age?
Biological age, unlike chronological age, is a concept that attempts to estimate a person’s physiological state through various biomarkers and statistical models. PhenoAge, the Klemera-Doubal method, epigenetic clocks, and various multi-biomarker models are being investigated for this purpose. A 2025 systematic review shows that there are numerous methods for calculating biological age and that results can vary depending on the biomarkers and model used.
What does PhenoAge show?
PhenoAge is an aging measurement model that uses chronological age along with routine clinical parameters such as albumin, creatinine, glucose, C-reactive protein, lymphocyte percentage, MCV, RDW, alkaline phosphatase, and white blood cell count. It can provide information associated with health risk at the population level. However, it should not be evaluated on its own as a disease diagnosis, a “true age,” or a definitive test indicating the necessity of a specific longevity treatment.
Epigenetic age clocks
Epigenetic clocks using DNA methylation patterns are important tools in aging biology research. GrimAge and similar models can show strong associations with certain health outcomes. Although their clinical areas of use are evolving rapidly, it is a sounder approach not to use different tests interchangeably and not to make treatment decisions based on a single result.
Functional measurements that may be more important than laboratory tests
In healthy aging, measurements reflecting daily function and physiological reserve often provide important complementary information.
- Muscle strength: Handgrip strength and lower extremity performance.
- Body composition: Muscle mass, fat distribution, and visceral fat.
- Cardiorespiratory capacity: VO₂max or appropriate field tests.
- Gait and balance: In terms of mobility and fall risk.
- Vascular health: Measurements such as blood pressure, lipid profile, and, in appropriate individuals, arterial stiffness.
- Sleep and recovery: Sleep duration, quality, and sleep apnea evaluation when necessary.
- Cognitive and social function: Memory, attention, mood, and social participation.
What is the strongest foundation in healthy aging?
Instead of a single supplement or intervention, regular physical activity, resistance exercise, adequate protein and balanced nutrition, not smoking, quality sleep, control of blood pressure and metabolic risks, vaccinations, and an age-appropriate preventive health approach form the fundamental foundation. On top of these, more advanced measurements or supportive interventions can be added according to the individual’s goals and clinical status.
NAD, NMN, peptides, and other longevity applications
NAD metabolism, NMN/NR, certain peptides, photobiomodulation, intermittent hypoxia, and other novel longevity approaches are active areas of research. Some mechanistic and early human studies offer intriguing results; however, the level of evidence varies markedly from method to method. Therefore, these applications should not be evaluated as substitutes for fundamental health behaviors, but as complementary options with clearly defined targets and expected contributions in appropriate individuals.
Is it possible to “reverse biological age”?
Some biological age indicators can change following lifestyle changes or interventions. However, a decrease in a biological age score does not mean that all organs have rejuvenated to the same extent or that lifespan has definitively lengthened. A more meaningful goal is to improve measurable risk factors and maintain physical and mental function over the long term.
Our approach at our Bodrum clinic
In our longevity assessment, we do not focus on a single laboratory panel or “biological age” result. We evaluate medical history, body composition, muscle strength, cardiometabolic risk, sleep, movement capacity, nutrition, and when necessary, HRV, vascular health, and selected biomarkers together. The goal is not to treat aging as a disease; it is to identify the individual’s modifiable risks and preserve physiological reserve and functionality as much as possible.
For clinical assessment and implementation options, you can review the Longevity and Healthy Aging guide, and for cellular energy, the Mitochondria content.
Frequently asked questions
Is it necessary to have a biological age test?
It is not necessary for everyone. Biological age tools can provide additional information; however, they should not take precedence over more directly modifiable indicators such as blood pressure, glucose, lipids, muscle strength, body composition, sleep, and physical capacity.
What is the most important supplement for healthy aging?
There is no single supplement for everyone. Rather than choosing a routine “longevity supplement” without evaluating deficiencies, dietary patterns, medications, and personal risks, addressing core lifestyle factors and correcting actual deficiencies is a more rational starting point.
Do longevity programs guarantee lifespan?
No. The goal is not to promise a definitive lifespan; it is to reduce cardiometabolic risks, preserve muscle and movement capacity, improve sleep and lifestyle, and support healthy years lived.
References
- World Health Organization. Healthy ageing and functional ability.
- World Health Organization. Integrated care for older people (ICOPE), 2nd ed. 2025.
- Zurbuchen R, et al. Methods for the assessment of biological age – A systematic review. Maturitas. 2025;195:108215. PMID: 39938306.
Written and medically reviewed by: Dr. Kerem Çağlayan
Last medical review: September 10, 2026
Disclaimer: This content is for general health information; it does not replace personalized diagnosis or treatment recommendations.
