So, a bit of an odd question, but it's been bugging me for a while; could you put whole eggs (shell and all) into a blender if you're making something like scrambled eggs? In a sufficiently powerful blender, would the shell bits damage the blender at all? What about your digestive tract? Is there anything in egg shells that could nutritionally help/harm you? I know it only takes 5 seconds to crack eggs, but I'm curious.
First off, the blender should not be damaged by the shells; if it is, it should have been replaced anyway. The mass of the shells is simply not enough to damage the blender in any significant way.
I would not, however, recommend eating the product, for a few reasons:
- You cannot be confident that the egg shell has been completely pulverised. At some point, the blades stop chopping the shell, and simply spins it around
- Whenever using egg shells for presentation, they should be thoroughly cleaned and sterilized, because you don't know what is coating it. You may very conceivably contract diseases from bacteria on the shell.
Before cholesterol became an issue for me I did this all the time. No harm to the blender nor, barring cholesterol, to me. I did get a small amount of shell dregs at the bottom of the cup (almost a sand consistency).
Just be sure to wash the egg before tossing it into the blender :)