What is the Longevity Research Library?

The Longevity USA Research Library curates recent peer-reviewed studies on longevity, nutrition, exercise, sleep, and supplements. Each study is rated by evidence strength: Strong, Moderate, or Preliminary.

How are evidence levels determined?

Evidence levels are based on study type (meta-analysis, RCT, cohort study), sample size, journal impact factor, and reproducibility of findings.

59 studies

Research Library

Peer-reviewed papers from top journals, summarized and graded by evidence strength. Updated Mon, Wed & Fri.

8/59

This week

Three Ways to Measure Biological Age All Predict Heart Disease

In over 320,000 UK adults followed for nearly 14 years, accelerated biological aging predicted heart trouble across the board. Depending on which aging clock was used, faster aging raised heart failure risk by 26% to 52% per standard deviation. Adding these biological age scores to standard risk models improved prediction of who would develop heart disease.

Heart & lung : the journal of critical care·Strong·Apr 28, 2026

When Your Body Ages Faster Than Your Birthday, Your Heart Pays the Price

In over 31,000 UK adults, those whose biological age outpaced their actual age had clearly worse heart outcomes. Each extra 4.6 years of biological aging meant a 29% higher risk of heart failure and a 16% higher risk of dying from heart disease. Heart scans showed these people also had weaker, smaller heart muscles. Women seemed more affected than men.

The journals of gerontology. Series A, Biological sciences and medical sciences·Strong·Apr 27, 2026

Apr 12–18, 2026

Tracking Your 'Biological Age' Over Time May Predict Death Risk Better Than a Single Snapshot

In over 90,000 Dutch adults followed for nearly 14 years, people whose biological age ran ahead of their calendar age had a higher risk of dying. More importantly, among 25,000 people measured twice, those whose biological age sped up over time faced even greater risk. People stuck in a pattern of accelerated aging had a 39% higher mortality risk compared to those aging at a normal pace. The results suggest that checking biological age once might not be enough.

GeroScience·Moderate·Apr 13, 2026

Apr 5–11, 2026

Faster Biological Aging Linked to Worsening Brain Small Vessel Disease

People who age faster biologically (based on blood biomarkers) appear more likely to develop worsening brain small vessel disease. In roughly 3,000 middle-aged adults followed for about five years, those with higher biological age scores had more new tiny brain lesions like lacunes and microbleeds. This held true even after accounting for actual calendar age. The finding suggests that biological aging clocks could help flag people at risk for this common precursor to dementia and stroke.

Neurology·Moderate·Apr 9, 2026

Mar 22–28, 2026

Centenarians Show a Distinct Metabolic Profile Tied to Bile Acids and NAD+

People who live past 100 have a unique metabolic fingerprint. In a study of 213 participants from the New England Centenarian Study, extremely long-lived individuals had higher levels of certain bile acids and lower levels of bilirubin compared to younger controls. Higher bile acid and steroid levels were linked to lower mortality risk. The researchers also built a "metabolomic clock" that estimates biological age, and deviations from it predicted death risk.

GeroScience·Moderate·Mar 26, 2026

Loneliness and Social Isolation Are Linked to Faster Biological Aging

Being lonely or socially isolated is associated with measurably faster biological aging. Across over 340,000 UK Biobank participants and 6,300 NHANES participants, higher loneliness and isolation scores correlated with accelerated aging on multiple biomarker clocks. The effect was consistent across three different ways of measuring biological age. Faster biological aging also appeared to partly explain how loneliness connects to earlier death.

Journal of affective disorders·Moderate·Mar 24, 2026

Mar 8–14, 2026

Vitamin C May Slow Primate Aging by Blocking Iron-Driven Cell Damage

As primates age, iron builds up in tissues and fuels a chain reaction of fat damage in cells. Researchers call this process "ferro-aging" and found that a specific enzyme (ACSL4) drives it. When aged monkeys received vitamin C for over 40 months, it directly blocked that enzyme. The result was reduced tissue damage, better brain and metabolic function, and biological age clocks that ticked backward across multiple organs.

Cell metabolism·Moderate·Mar 10, 2026

Feb 22–28, 2026

Fish-Eaters and Vegetarians Show Slower Biological Aging Than Regular Meat-Eaters

Among over 400,000 UK adults, people who ate fish but little meat aged the slowest biologically. Vegetarians came in a close second. Regular meat-eaters aged fastest by two different biological age measures. These patterns held up over time too. People who stuck with low-meat, fish-based, or vegetarian diets saw their biological aging slow down compared to consistent meat-eaters during follow-up.

Clinical nutrition (Edinburgh, Scotland)·Moderate·Feb 23, 2026

Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.

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