While the shells themselves aren’t edible, chitosan is a supplement made from a substance found in the outer shells of crustaceans. It’s touted for its potential weight loss benefits.

In a recent article published in the American Journal of Obstetrics & Gynecology, researchers review and highlight the benefits of chitosan-covered tamponades in the emergency treatment of ...

and in this case, chitosan. "Chitosan is made out of the shells of prawns, king prawns and other crustaceans. The environment benefits from the use of this waste material and, what is more ...

In this context, non-digestible dietary components, such as indigestible dextrin, lactosucrose, chitosan, and eggshell membrane proteins, may offer potential benefits by remaining in the ...