This is an early 20th-century speculative essay by Aleister Crowley (writing as "The Master Therion"), blending proto-scientific physiology with occult philosophy to theorize about human longevity and a literal Elixir of Life. Crowley argues that aging is essentially a physical solidification — arteries hardening from mineral deposits, tissues losing elasticity — and surveys practical remedies including yoga postures (Asana), breath control (Pranayama), dietary restriction, and hydration, while ultimately dismissing health-obsessed ascetics as "walking sepulchres." His central and more provocative claim is that food contains an unmeasured vital force — analogous to electricity passing through a copper wire — distinct from its chemical components, which accounts for the difference between living and dead matter that materialist science cannot explain. The essay's most distinctive move is pivoting from this vitalist hypothesis to announce that Crowley believes he has actually identified a "Super-food" — a substance procurable only outside England or America — which can charge a person with near-superhuman energy and heightened intelligence for twenty-four hours, and which he claims to know how to "charge with the Life-force." The tone oscillates between earnest physiological argument and grandiose mystical proclamation, making it difficult to separate genuine scientific speculation from occult self-promotion. It will interest readers of Crowley's esoteric writings, historians of vitalism and early 20th-century fringe science, or anyone curious about how occult traditions have absorbed and reframed contemporary scientific concepts.