→ You may not want to try them, but egg shells are edible, and full of calcium.

While the idea of eating egg shells sounds less than appealing, if you happen to crunch down on a bit, don’t be alarmed. In fact, you’ll be adding some bone-boosting calcium to your diet. Egg shells are indeed edible, so if you’re curious about the calcium, hard-boil an egg and give the shell a sample.