What's the best way to speed healing of a broken bone?

Follow MDs direction. Your treating orthopaedic surgeon will work with oyu to maximized the healing potential for your specific fracture taking into account your overall medical well-being. Most fractures heal inabout 6 weeks. We really cannot "trick' mother nature and speed up the natural bone healing process. Avoiding issues that may slow down healing is best: wear splint/cast as directed and maintain a healthy diet.