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
Air Pollution, Oxidative Stress, and Nutritional Protection
Air pollution is a top-5 global health risk. While environmental mitigation is primary, nutritional strategies can blunt some of the inflammatory and oxidative damage from particulate and ozone exposure.
2026-02-24
Blue Zone Dietary Patterns: What the Longest-Lived Populations Actually Eat
Blue Zone populations (Sardinia, Okinawa, Nicoya, Ikaria, Loma Linda) share dietary patterns centered on whole plant foods, moderate caloric density, and minimal ultra-processed food. Epidemiological data consistently associates these patterns with lower all-cause mortality, though confounding by lifestyle, social, and genetic factors limits causal inference.
2026-02-24
Chronic Allergic Inflammation in Aging: Mechanisms and Evidence-Based Management
Allergic inflammation can worsen with immune senescence, contributing to systemic inflammatory load. This article covers the evidence for dietary and supplement interventions that modulate allergic response without the side effects of antihistamines.
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.