I have been trying to eat eggshells as a good way of getting more calcium into my diet, as well as lots of other minerals which eggshells are rich in.
I have been thoroughly washing the shells, drying them, grinding them in a small processor sort of thing (possibly not finely enough) then trying to dissolve the powder in lemon juice before stirring it into soups etc.
However, the soups seem to go very gritty, which is not appealing at all! It DOES seem to have had a really beneficial effect on my BM's, which nothing else except immodium seems to have done.
Should the powdered shell dissolve completely in lemon juice (it fizzes and rises up the glass jar that I do this in) but leaves a lot of very gritty bits - feeds as though it will eventually sand my teeth away!
Any one else do this, and do you manage to get rid of the grit?
I don't, personally, but from what I hear, cowboys used to drop the eggshells in their coffee pots to extract the calcium into their morning coffee. Just something to consider; you don't necessarily have to consume them whole.
I basically do what you do. I carefully wash the shells from my pastured chickens and lay them out to dry. When I have accumulated quite a few (maybe a quart, loosely packed) I put them into my vitamix and process them into a fine powder. I keep the powder in an airtight jar and use it to make calcium citrate. How long are you letting the calcium dissolve in the lemon juice? It should be at least 6 hours, but not longer than 12. Somewhere therein (depending on the shell perhaps?) is the magic number for a grit free calcium citrate. I usually just test mine until it seems palatable.
Here is a link to the recipe I use for calcium citrate.
Eating egg shells feels very unnatural, hence I'd be very cautious.
I performed an experiment to see how easily absorbed egg shell was. I ground egg shell to a particle size of around 0.25mm with a mortar and pestle. This was as small as I could get it after around 15 minutes. This is probably in the area of course ground pepper.
Once done I took a teaspoon of the powder after a meal and swallowed it with the help of a quantity of water only just sufficient to wash it down.
A day later, in my stools I observed pieces of egg shell identical to the ones I swallowed. Neither smaller nor rounded.
Conclusion: The egg shell was not dissolved by my gastric acid. Due to its jagged appearance, I'd say it wasn't even partially dissolved (one would expect it to be rounded at least). There is only one explanation for this: The fragments of eggshell visible in my stools were washed out of the stomach before they were acted on by the gastric acid.
Now particles of eggshell are particularly course and brittle, an abrasive combination and from my experiment I can clearly see at least part of the powder is getting through my stomach undissolved... Whether it is doing damage to the delicate intestinal lining as food is forced through the intestine, I'll leave for you to consider.
I've demonstrated that is is possible to wash egg shell straight through your stomach. If you wish to take eggshell, a particularly abrasive substance, then take caution and make sure it is actually being dissolved in the stomach. Whilst egg shell ground to a much smaller particle size would be dissolved far quicker, for it has much higher surface area, it wouldn't matter if it is still being washed through immediately.
Grind it into the finest powder possible
either a) consume with something that sits in the stomach for a long time, eg, solid food, particularly meat b) pre dissolve the egg shell in something like vinegar (though drinking vinegar is going to be rough but good luck)
Perform your own experiments and use your own logic and reasoning. I'd seriously ask someone with credentials before you start eating egg shells if you have any doubts.
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