2026-02-24
Longevity Biomarkers: What to Track, How Often, and What the Evidence Says They Mean
No single biomarker captures biological age, but a panel of accessible blood and functional markers — HbA1c, hs-CRP, homocysteine, IGF-1, DHEA-S, grip strength, and VO2 max — provides a practical composite picture. Epigenetic clocks offer precision but limited actionability at current cost.
2026-02-24
SIRT3 and Mitochondrial Integrity: NAD-Dependent Deacetylase, Caloric Restriction Mimicry, and Activators
SIRT3 is the primary mitochondrial sirtuin — a NAD-dependent deacetylase that regulates ATP synthesis, ROS detoxification, and fatty acid oxidation. Its activity declines with age and NAD+ depletion. Activators include honokiol, urolithin A, and exercise, though human trial data is thin.
2026-02-19
Lion's Mane and Cognitive Function: Mechanisms, Human Evidence, and Protocol
Lion's Mane mushroom stimulates nerve growth factor production and has shown cognitive benefits in small randomized trials in older adults, with preclinical evidence stronger than human data.
2026-02-18
Partial Epigenetic Reprogramming for Vision Loss: Life Biosciences ER-100 Trial
Life Biosciences received FDA clearance to begin the first human trial of partial epigenetic reprogramming using OSK Yamanaka factors delivered via AAV for glaucoma and NAION. Trial is in early stages; no human efficacy data exists yet.
2026-02-18
NMN vs NR vs Nicotinamide: First Direct Human Comparison of NAD+ Precursors
A 2025 Nature Metabolism crossover trial directly compared NMN, NR, and nicotinamide in healthy adults. NMN and NR produced sustained blood NAD+ increases of 130–150%; nicotinamide produced only a transient 4-hour rise. Gut microbiome conversion was a key mechanistic finding.