Longevity & Healthy Aging
Longevity research asks how to stay healthy for longer. This area labels the strength of evidence on every topic: most compound claims rest on early or animal research.
Lifestyle factors have the strongest evidence. Testing and supplement claims are examined critically.
Start here: Healthspan and Lifespan: What the Research Measures
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Safety first
- These topics can involve legal restrictions, medicine interactions and serious health risks. Laws differ by country and change.
- Do not stop a prescribed medicine or delay care for a serious condition to try any of these.
- If someone may be poisoned or in a crisis, call emergency services first. See urgent help.
Overview
What this area covers
Longevity research asks two questions: can people live longer, and can they stay healthy for more of those years? The World Health Organization describes biological aging as the build-up of many kinds of molecular and cellular damage over time, with changes that are only loosely tied to age in years. [1] Scientists group the processes involved into "hallmarks of aging," including mitochondrial dysfunction, cellular senescence and altered nutrient sensing. [2]This area explains that research in plain language. It is education only. It does not give amounts, recommend products, or suggest starting or stopping a medicine. Please talk with your own clinician about your health.
How the guides are organized
- Healthy aging: healthspan and lifespan defines the terms, and nutrition, exercise, sleep and prevention covers the habits with the most research behind them. The National Institute on Aging says exercise, a healthy diet, regular doctor visits and mental health care are within a person's reach. [3]
- Longevity compounds: NAD+, NMN and nicotinamide riboside and spermidine, resveratrol and CoQ10.
- Cellular science: mitochondria and oxidative stress and senescence, senolytics and autophagy.
- Longevity testing: biomarkers and biological age tests and wearables and sleep tracking.
- Research and limits: what human evidence exists, experimental compounds, and research limitations and safety.
How we label evidence
Every claim is labeled with how strong the evidence is: approved medicine (name the regulator and use), established, promising but limited, mixed, insufficient evidence, preclinical (cells or animals only), no good evidence of benefit, evidence of harm, and marketing claim. Where we looked and found nothing usable, we write "Proper evidence not found." Most longevity compound research is still in cells and animals or in small human trials. A review of NAD+ boosting, for example, found clear biological activity but inconclusive clinical benefit for anti-aging. [4] A 2026 review of senolytic treatments called them investigational. [5] For the site-wide method, see how we label evidence.Safety and legal pointers
In the US, supplement firms are responsible for evaluating safety and labeling before marketing, and the FDA can act after products reach the market. [6] Rules differ by country and change over time; this site's pages are not legal advice. See safety and legal basics for Specialty Topics, how supplements are regulated and the Wellness guide to healthy aging.Explore Longevity & Healthy Aging
Healthy Aging(2)Healthspan and lifespan, and the lifestyle factors with the strongest evidence.
- Healthspan and Lifespan: What the Research Measures
What healthspan and lifespan mean, how researchers measure the gap between them, and what animal studies of aging can and cannot tell us about people.
- Nutrition, Exercise, Sleep and Prevention in Healthy Aging Research
What large studies and trials show about eating patterns, physical activity, sleep and preventive care in healthy aging, with the limits of observational research and bl…
Longevity Compounds(2)NAD+, NMN, NR, spermidine and other compounds, labeled by strength of evidence.
- NAD+, NMN and Nicotinamide Riboside: What Research Shows
NAD+, NMN and nicotinamide riboside explained: what human trials show, how animal findings differ, the US FDA position on NMN as a supplement, and safety questions.
- Spermidine, Resveratrol and CoQ10 in Longevity Research
What animal and human research shows about spermidine, resveratrol and CoQ10 in aging, with evidence labels, a Swedish selenium-CoQ10 trial, safety notes and interaction…
Cellular Science(2)Mitochondria, senescence, autophagy and the biology of aging, kept apart from product claims.
- Mitochondria and Oxidative Stress in Aging
How researchers think mitochondria and oxidative stress relate to aging, why antioxidant pills have not been shown to help people live longer, and what animal-only findi…
- Cellular Senescence, Senolytics and Autophagy
Cellular senescence, senolytic drugs, autophagy, fasting and nutrient-sensing pathways explained, with what small human trials show and why these remain investigational.
Longevity Testing(2)Biomarkers, biological age tests and wearables, and what they can and cannot tell you.
- Biomarkers and Biological Age Tests: What They Can and Cannot Tell You
What biomarkers, epigenetic "biological age" tests and metabolic testing can and cannot tell you, and why researchers say validation and clinical usefulness are still li…
- Wearables and Sleep Tracking: Accuracy and Limits
How accurate wrist and ring wearables are for sleep and heart rate variability, what systematic reviews found, and how to use the numbers without over-trusting them.
Research & Limits(3)Human evidence, experimental compounds and where the evidence stops.
- Longevity Interventions: What Human Evidence Exists
What human trials and large cohort studies actually show for physical activity, calorie restriction, antioxidant supplements and NAD+ precursors in healthy aging, with e…
- Experimental Longevity Compounds: Rapamycin, Metformin and Others
What is known about rapamycin, metformin and senolytics in the context of aging, based on regulator-style drug information and published trials, with risks and no person…
- Longevity Research Limitations and Safety
Why mouse results, biomarker changes and clinic marketing do not prove longer healthy life in people, and the safety questions to ask before trying any longevity product…
Related Wellness Goals
Research connections
Our pages cite the studies and official sources behind each statement. For the underlying records, see the evidence page for this goal and the Research Library.
Specialty Topics Research and Evidence: How Much Research Exists and How to Read It Research Library Wellness Goals
Frequently asked questions
What is the difference between lifespan and healthspan?
Lifespan is years lived; healthspan is years lived in good health. Researchers usually estimate the second with measures such as healthy life expectancy. See healthspan and lifespan. [7]
Is there a proven anti-aging supplement?
Not in the sources we reviewed. A systematic review of NAD+ boosting found its clinical effectiveness for anti-aging remains inconclusive. [4]
Are longevity treatments approved medicines?
Senolytic and similar approaches are considered investigational rather than established therapies. [5]
What does the best evidence say about healthy aging?
The strongest everyday evidence points to physical activity, a healthy eating pattern, enough sleep and regular health care. [3]
Are supplements checked by the FDA before sale?
In the US, supplement makers are responsible for evaluating safety and labeling before marketing, and the FDA can act after a product reaches the market. [6]
Can longevity tests tell me how long I will live?
Be cautious. See biomarkers and biological age tests for what such tests can and cannot show, and talk with a clinician about any result.
References
- World Health Organization. Ageing and health (fact sheet, 1 October 2025). Ageing and health. Read 2026-10-22.
- Hallmarks of aging: An expanding universe. Cell 2023. Hallmarks of aging: An expanding universe. Read 2026-10-22.
- National Institute on Aging, NIH. What Do We Know About Healthy Aging? Read 2026-10-22.
- NAD⁺ supplementation for anti-aging and wellness: A PRISMA-guided systematic review of preclinical and clinical evidence. Ageing research reviews 2026. NAD⁺ supplementation for anti-aging and wellness: A PRISMA-guided systematic review of preclinical and clinical evidence. Read 2026-10-22.
- Therapeutic reversal of cellular senescence: A systematic review of senolytics, senomorphics and anti-ageing therapies in human clinical trials. British journal of clinical pharmacology 2026. Therapeutic reversal of cellular senescence: A systematic review of senolytics, senomorphics and anti-ageing therapies in human clinical trials. Read 2026-10-22.
- US Food and Drug Administration. Dietary Supplements. Read 2026-10-22.
- World Health Organization, Global Health Observatory. Healthy life expectancy (HALE) indicator definition. Healthy life expectancy (HALE). Read 2026-10-22.
Content last updated . This section has not been medically reviewed.