Research Digest
Research Library
Peer-reviewed papers from top journals, summarized and graded by evidence strength. Updated Mon, Wed & Fri.
May 17–23, 2026
2 studiesExercise Is the Only Proven Way to Extend Healthy Years, Review Finds
Researchers looked at 15 trials testing ways to extend healthspan, the years you live in good health. Exercise, alone or combined with other approaches, was the only thing that consistently improved how well people functioned and felt. Other approaches like supplements and calorie restriction had too little evidence to draw conclusions.
Vitamin D and Vitamin E May Boost a Weakening Immune System in Older Adults
As we age, our immune system gets sluggish and inflammation creeps up. Looking at nine trials, researchers found that vitamin and mineral supplements modestly improved immune function in older adults. Vitamin D lowered inflammation and raised immune cell activity, while vitamin E had the biggest effect on cell-based defenses. The overall boost was real but small.
Mar 15–21, 2026
2 studiesResistance Training Plus Amino Acids Beat Either Alone for Muscle in Older Women
In healthy women aged 65 and older, combining resistance exercise with essential amino acid supplements for 12 weeks increased muscle mass more than doing either one alone. The combo group also showed the biggest improvements in fitness tests and the best shift in muscle-related hormones. Inflammatory markers dropped too, with one key marker only declining in the combined group. Each intervention helped on its own, but pairing them produced clearly stronger results.
Eight Hyped Compounds Failed to Extend Lifespan in a Major Mouse Study
The NIA's Interventions Testing Program tested eight compounds across three lab sites in genetically diverse mice. None extended lifespan. That includes astaxanthin, alpha-ketoglutarate, pioglitazone, atorvastatin-telmisartan, and others with prior promising results. Some compounds previously shown to work at different doses or start ages didn't replicate under new conditions. Two drugs actually shortened lifespan in female mice.
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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