Research Library

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

Aug 3–9, 2026

3 studies

Why Low NAD+ May Push Insulin-Making Cells Into Self-Inflicted Inflammation

In cells and animals, oxidative stress drained NAD+ inside the insulin-producing cells of the pancreas, flipping a chemical switch that set…

Cell death and differentiation·Preliminary·Aug 8, 2026

Lung health

Why Older Lungs Break Down Faster When Infection Strikes

If you ever wondered why pneumonia or severe flu hits older people so much harder, this review lays out the reasons.

Ageing research reviews·Moderate·Aug 6, 2026

NMN

NMN Calmed Eye Inflammation and Slowed Blood Vessel Damage in Mice

Wet macular degeneration happens when abnormal blood vessels grow under the retina and scar tissue forms.

Investigative ophthalmology & visual science·Preliminary·Aug 3, 2026

Jul 27 – Aug 2, 2026

1 study

probiotics

Probiotics Plus Vitamin D Linked to Remission in a Painful Mouth Condition

Oral lichen planus is a chronic inflammatory condition in the mouth that is hard to treat and carries a small cancer risk.

International journal of molecular sciences·Preliminary·Jul 27, 2026

Jul 20–26, 2026

1 study

sarcopenia

How Exercise Quiets a Muscle-Wasting Inflammation Signal in Older Women

Scientists found a specific inflammation signal called CXCL2 that climbs as muscle loss gets worse with age.

Journal of sport and health science·Moderate·Jul 22, 2026

Jul 13–19, 2026

2 studies

immune aging

A Single Protein's Decline in Immune Cells May Drive Body-Wide Aging

In mice, a protein called Lamtor5 drops with age and lets immune cells called macrophages go into a worn-out, inflammatory state.

Cell death and differentiation·Preliminary·Jul 16, 2026

stem cells

Aging Blood Stem Cells May Be a Hidden Source of Chronic Inflammation

In mice, the stem cells that make blood become a driver of the constant, low-level inflammation that comes with age.

Nature aging·Preliminary·Jul 16, 2026

Jun 29 – Jul 5, 2026

1 study

calorie restriction

Cutting Calories May Calm the Inflammation Linked to Aging Cells

Scientists looked at how diet and supplements affect signs of aging cells in people.

Ageing research reviews·Moderate·Jul 4, 2026

Jun 15–21, 2026

2 studies

vitamin D

Vitamin D Eased Fatty Liver and Blood Sugar Problems in Obese Rats

Junk food fed rats developed fatty liver, insulin resistance, and inflammation, much like people on a poor diet.

The Journal of nutritional biochemistry·Preliminary·Jun 20, 2026

nicotinamide riboside

Nicotinamide Riboside May Shield Female Mouse Muscle From Heat Damage

Heat stress can hurt muscle by triggering inflammation and damaging the cell's power plants.

Muscles (Basel, Switzerland)·Preliminary·Jun 15, 2026

Jun 8–14, 2026

1 study

muscle atrophy

How a Common Chemo Drug Eats Away at Muscle, and a Possible Way to Block It

Cisplatin is a widely used cancer drug, but it often wastes away muscle.

Cell communication and signaling : CCS·Preliminary·Jun 12, 2026

Jun 1–7, 2026

1 study

calcium

How a Cellular Calcium Glitch Speeds Up Aging in Mice

When cells lose control of their calcium balance, it sets off a chain reaction that triggers DNA damage and inflammation tied to aging.

Nature communications·Moderate·Jun 6, 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.

Common questions

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.

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