Arlean ,they do not disappear . The best way to describe the experience if you mix them into something is eating sandwiches on a windy day on a beach. The best way they say is drinking the pulverised mix with some lemon juice and water to break down the egg shells for digestion. I have a nother breakdown of nutrients in egg shells but can't remember where I took it from .Here goes :
EGG SHELLS
Water, % 29-35
Protein, % 1.4-4
Crude Fat, % 0.10-0.20
Ash, % 89.9-91.1
Calcium, % 35.1-36.4
CaCO3, % of total Ca 90.9
Phosphorus, % 0.12
Sodium, % 0.15-0.17
Magnesium, % 0.37-0.40
Potassium, % 0.10-0.13
Sulphur, % 0.09-0.19
Alanine, % 0.45
Arginine, % 0.56-0.57
Aspartic Acid, % 0.83-0.87
Cystine, % 0.37-0.41
Glutamic Acid, % 1.22-1.26
Glycine, % 0.48-0.51
Histidine, % 0.25-0.30
Isoleucine, % 0.34
Leucine, % 0.57
Lysine, % 0.37
Methionine, % 0.28-0.29
Phenylalanine, % 0.38-0.46
Proline, % 0.54-0.62
Serine, % 0.64-0.65
Threonine, % 0.45-0.47
Tyrosine, % 0.25-0.26
Valine, % 0.54-0.55