Astronaut Bone Density & Nutrition Countermeasures

Spaceflight removes the mechanical loading that keeps the human skeleton in balance, and without countermeasures astronauts lose bone mineral density at a real, measured rate. This simulator models that trabecular bone remodeling balance directly: dial in dietary calcium, vitamin D and resistive-exercise adherence and watch a 3D patch of trabecular bone thin, lose struts, or hold steady over a simulated mission, with live bone mineral density, elapsed mission days and fracture-risk readouts driven by the same remodeling equation NASA and ESA countermeasure research is built around.