2026-02-24
Testosterone Decline in Men: Natural Trajectory, Functional Impact, and Evidence-Based Support
Testosterone declines approximately 1-2% per year from age 30. The clinical significance of this decline depends on absolute levels and symptoms, not chronological age alone. Testosterone replacement therapy has RCT evidence for improving muscle mass, bone density, and sexual function in men with confirmed hypogonadism. Lifestyle factors significantly modify the trajectory.
2026-02-24
Alcohol, Aging, and Long-Term Health: What the Evidence Shows
Alcohol consumption interacts with aging biology in complex ways. This article covers the liver, brain, cardiovascular, and cancer evidence, plus what nutritional strategies can mitigate harm.
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
Cognitive Stress Reactivity: How Stress Disrupts Mental Performance and What to Do About It
Repeated psychological stress impairs working memory, attention, and decision-making through cortisol-mediated hippocampal effects. This article reviews the mechanisms and the evidence for stress-buffering interventions including adaptogens and behavioral strategies.
2026-02-24
Estrogen, Menopause, and Aging: Hormonal Mechanisms, Health Implications, and Protocol
Menopause-associated estrogen decline drives accelerated changes in cardiovascular risk, bone density, cognitive function, and metabolic health. Menopausal hormone therapy (MHT) has RCT and observational evidence supporting benefits for symptomatic relief and bone protection; cardiovascular and breast cancer risks depend on timing, type, and route of administration.