Metabolic Insights

Sarcopenia After 40 — Silent Muscle Loss Explained | 2026 Most people have heard of osteoporosis — the gradual thinning of bones that tends to accelerate after middle age and carries real consequences for fractures, mobility, and independence. It's a household word. Public health campaigns have raised awareness of it for decades. Bone density scans are a routine part of healthcare for adults in their fifties and sixties. Sarcopenia is the muscular parallel. The same kind of slow, accumulating, largely symptom-free tissue loss — but in skeletal muscle rather than bone — that begins earlier than most people expect and carries metabolic and functional consequences that are only now being understood at their full scale. The word itself comes from the Greek for "poverty of flesh." It describes the progressive, age-related loss of skeletal muscle mass, strength, and function that research has now established begins not in old age, but in the fourth decade of life. In y...

Muscles as a Glucose Disposal System — What It Means | 2026 At some point in the past decade, a quiet shift happened in how researchers and metabolic health specialists talk about skeletal muscle. The old framing — muscle as an organ of movement, a tissue of performance, something you build at the gym and lose when you stop going — started giving way to something more interesting and considerably more consequential. Muscle, in the language of metabolic biology, is now frequently described as a glucose disposal system. A clearinghouse for blood sugar. A living, contracting metabolic buffer that handles the majority of the body's post-meal glucose with a reliability that no pharmaceutical has yet replicated at scale. That's a significant reframing. And for adults in their forties, fifties, and early sixties who spend most of their waking hours sitting at desks, attending meetings, and eating lunch at their keyboards — people who may not think about muscle mass as a healt...