2026-02-24
Circadian Rhythm Disruption in Aging: Mechanisms, Health Consequences, and Restoration
Circadian clocks govern virtually every physiological process — metabolism, immune function, DNA repair, and hormone secretion follow 24-hour rhythms entrained by light. With aging, the circadian system weakens: clock gene amplitude declines, light sensitivity decreases, and circadian outputs desynchronize. Strengthening circadian inputs through light exposure, meal timing, and physical activity has evidence-based effects on sleep, metabolic health, and biological aging.
2026-02-24
Longevity Biomarkers: What to Test, What the Results Mean, and How to Track Progress
Biological age testing spans conventional labs (HbA1c, CRP, lipids) to newer epigenetic clocks and proteomic aging scores. Most conventional biomarkers are actionable today; epigenetic clocks measure biological vs. chronological age but their clinical utility for intervention-guiding remains limited. A pragmatic panel of validated tests provides meaningful signal about longevity trajectory.
2026-02-23
Sedentary Behavior and Step Count in Aging: What the Evidence Says About Movement Thresholds
Low daily step count and prolonged sitting independently predict cardiovascular disease, metabolic dysfunction, and premature mortality. This article reviews the evidence thresholds and practical movement strategies for aging adults.
2026-02-20
Constipation and Low Fiber Intake: Psyllium, Inulin, and Probiotic Evidence
Guideline-aligned constipation care starts with fiber and hydration strategy. Psyllium has the strongest direct bowel evidence, while inulin and selected probiotics can add context-specific support.
2026-02-20
Irritable Bowel Symptom Load: Fiber-Probiotic Personalization and What to Track
IBS control is strongest with targeted diet structure and symptom tracking. Psyllium, selected probiotics, inulin titration, and ginger can be useful but require personalization.