you can buy supplement products made from egg shells. specifically collegen supplements. I hate being waistful. I'm also carnavore now. Ive been keeping the used eggshells in the fridge. I tend to cycle diffrent health stuff to see the effect. I trully do feel muscle recovery the morning after the raw egg shells. For cooked couldnt really say. 

 Definitely interesting to know, but seems to be working for you so why not right? Also seen you mentioned helping your teeth, that was cool to know as well.