Although protein rich eggs have long been hailed as ‘natural healers’, recent research has revealed that their shells too offer a raft of health benefits. 1. Healthy bones. The thin membrane inside the shells is packed with nutrients essential for strong bones and teeth. Applying crushed eggshells on swollen joints help reduce inflammation and stiffness and repairs damaged muscles. This is particularly beneficial for people with rheumatoid arthritis, osteorthritis or scurvy. A teaspoon dried and pulverised  eggshells (composed of calcium carbonate) acts as a natural calcium supplement.<\/p>