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.
2026-02-24
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
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
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.