Longevity Report · Week of July 25, 2026
GLP-1 muscle myths, deadly wellness gaps, exercise doses, NAD failures, and biological clocks
- GLP-1 Drugs Don't Directly Cause Muscle Loss—Rapid Deficit Without Resistance Training DoesA fitness coach who admits GLP-1 drugs have cost him business, and a peer-reviewed BMJ editorial, agree on something the loudest voices online refuse to say: these drugs do not, by themselves, eat your muscle.
- Death After Unregulated IV NAD⁺ Infusion Exposes Longevity Clinic Oversight GapAt 1:09 p.m. on Sunday, July 19, 2026, Elizabeth Baron was pronounced dead at NewYork-Presbyterian Allen Hospital with an IV catheter still lodged in her right hand.
- Resistance Training Erases Muscle-Aging Signatures at a Modest DoseTwo older adults walk into a lab. They take 9,600 steps a day—nearly as many as the 23-year-olds also being measured, at 10,200. By any wearable's logic, they are equally active. By any molecular readout, they are not ev…
- NAD⁺ Precursor Trials Keep Failing: New NR Study Shows No Cognitive or Vascular BenefitArticle — "NAD⁺ Precursor Supplements Keep Failing: Latest NR Trial Shows No Cognitive or Vascular Benefit": Article — "NAD⁺ Precursor Supplements Keep Failing: Latest NR Trial Shows No Cognitive or Vascular Benefit": A …
- From Calendars to Clocks: Where Biological-Age Measurement Stands and What Trials Come NextPeople with "old" brain astrocytes developed Alzheimer's at 12.6 times the rate of those with "young" astrocytes. In carriers of two copies of the APOE4 allele, the gap reportedly widened to nearly 40-fold, per the Wyss-…
Threads we are following
- Will prescribing guidelines evolve to bundle protein and resistance-training coaching directly into GLP-1 scripts?
- The medical examiner's toxicology results and whether prosecutors upgrade Cabrera's charges to manslaughter
- Whether the higher-volume mortality falloff above ~60 minutes weekly is real or a statistical artifact of the four-study dose-response analysis
- Whether Martens's proposed larger, longer, multi-site NR trial confirms the hippocampal blood-flow hint or adds another null
- Whether FAXAge's 10-year follow-up will confirm that early clock movement predicts healthier long-term outcomes, validating biological age as a surrogate endpoint.
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