endocrine — Terrain

Vitamin D: Restoring the Sun–Hormone Connection

Feb 28, 2026 — Vitamin D is not just a vitamin — it is a hormone shaped by sunlight, membrane health, age, and critical cofactors. A practical guide to restoring the sun–terrain connection.

Retatrutide, GLP-1s and the New Metabolic Era

Jun 6, 2026 — A systems-level look at retatrutide and GLP-1 drugs, exploring appetite, reward, obesity, metabolic flexibility, and the repair window that may emerge when biological signaling becomes clearer.