Yes eggshell is good for human consumption.
Eggshell is good for human consumption because eggshells contain calcium and the calcium in eggshells is good for bone health and Osteoporosis.
You can build strong bones and keep your bones and overall body healthy when you consume eggshells.
However you should not try chewing eggshells though or swallow the eggshells when broken up or cracked up but instead you take the eggshells and grind the eggshells into a fine powder.
Then you can add the eggshell powder to food or to water or some other drink such as juice.
The eggshells are very good for your health when consumed correctly.