Yes, instead of taking calcium citrate for my calcium I take eggshell calcium made from eggs I eat or you can purchase it from Swanson vitamins. https://www.swansonvitamins.com/p/swanson-ultra-eggshell-calcium-vitamin-d3-120-caps
Here is a link if you want to make your own and try it. I always use organic eggs as they have thicker shells and I a higher mineral content (my guess that is why they are harder).
https://www.peteandgerrys.com/blogs/field-notes/diy-eggshell-calcium-powder