02/07/2026
A dear friend recently shared an article on genetics and longevity that emphasized genetics as the primary determinant of aging and lifespan. It was an interesting read, and it reflects a perspective that is common in much of today’s research literature.
My own clinical experience has led me to a different conclusion.
While genetics certainly matter, I believe they tell only part of the story. In practice, I have found that daily metabolic signals, how the body stores energy, adapts to stress, and regulates insulin, play a far greater role in shaping health and longevity over time. Often, simple observable markers, such as waist circumference, posture, and tissue quality, reveal far more about long-term metabolic health than laboratory values or genetic testing alone.
This perspective is what inspired me to write my latest booklet, which explores aging and longevity through a systems-based, metabolic lens, with particular attention to the role of the liver and early, observable signs of dysregulation.
The booklet is available as a free download here:
https://issuu.com/muyblue/docs/the_liver_aging_and_longevity
My hope is that it adds another thoughtful voice to an important and ongoing conversation about what truly shapes healthy aging.
Aging is not simply the passage of time. It is the gradual loss of metabolic flexibility. This booklet explores the liver’s central role in regulating insulin signaling, fat metabolism, inflammation,
