Leyla Weighs In: Biological Age vs. Chronological Age--How Lifestyle Choices Can Slow Aging

Registered dietitian nutritionist Leyla Muedin discusses the growing interest in biological age versus chronological age and explains that biological aging is modifiable through consistent lifestyle choices. She outlines common measurement tools and biomarkers, including epigenetic clocks (DNA methylation), telomere length, VO2 max, inflammatory markers, grip strength, and muscle mass, noting that genetics account for only about 25–40% of biological aging variation. Key interventions include regular aerobic and resistance exercise, protein-adequate nutrition to preserve muscle and prevent sarcopenia (with whey protein and leucine-rich foods noted), improved sleep, stress management, reducing processed foods and visceral fat, and lowering chronic inflammation (CRP, IL-6). She also reviews hormetic stressors such as sauna use and mentions red/near-infrared light and sun exposure without sunglasses. Leyla shares client examples showing biological age can worsen or improve, and encourages repeat testing after lifestyle changes.