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.

Research Digest

Research Library

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

Evidence

44/156

Topic

Jul 5–11, 2026

1 study

curcumin

How Curcumin Protects Brain Cells in Parkinson's Mouse Models

In mice and cells made to mimic Parkinson's, curcumin protected the brain cells that make dopamine.

Molecular neurobiology·Preliminary·Jul 6, 2026

Jun 28 – Jul 4, 2026

4 studies

astaxanthin

Astaxanthin Protected Mouse Ovaries From Chemo Damage

Chemotherapy can push younger women into early ovarian failure.

Journal of ovarian research·Preliminary·Jul 3, 2026

stress

How Chronic Stress Ages Your Blood Stem Cells Through the Gut

In mice, ongoing psychological stress made blood-forming stem cells act older and worn out.

Cell stem cell·Preliminary·Jul 2, 2026

NAD+

NAD Sprayed Up the Nose Helped Mice Regrow Their Sense of Smell

A form of NAD delivered through the nose helped restore lost smell in mice and pushed stem cells to become new smell neurons.

Experimental & molecular medicine·Preliminary·Jul 1, 2026

fasting

Big Trial Asks If Fasting or Exercise Can Actually Slow Aging in Seniors

Scientists are launching a year-long trial to test whether exercise, time-restricted eating, or both together can slow biological aging.

GeroScience·Preliminary·Jun 29, 2026

Jun 14–20, 2026

4 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 Improved Movement in Parkinson's Mice Without Saving Neurons

Nicotinamide riboside (NR), a popular NAD-boosting supplement, improved movement in mice with a Parkinson's-like condition.

Research square·Preliminary·Jun 19, 2026

protein

Why How You Cook Meat Matters for Older Bodies That Absorb Less

As we age, our bodies get worse at breaking down and absorbing protein.

Food science of animal resources·Preliminary·Jun 18, 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 7–13, 2026

3 studies

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

interval training

Short Bursts of Faster Exercise Beat Steady Cardio for Aging Brains in Rats

In aged male rats, both steady cardio and interval training helped with learning and memory.

BMC sports science, medicine & rehabilitation·Preliminary·Jun 12, 2026

nicotinamide riboside

Nicotinamide Riboside Protected Mitochondria in Mice With a Rare Muscle Disease

NR, a popular NAD+ booster, kept muscle cell powerhouses working in mice with a rare genetic muscle disorder.

Human molecular genetics·Preliminary·Jun 12, 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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