It is generally safe to eat shrimp shells, especially if they are properly cooked and cleaned. Shrimp shells are composed of chitin, a fiber that is not harmful but not easily digestible. Eating shrimp shells can add texture and flavor, and when fried or cooked right, they can become crispy and enjoyable. However, some people may find them tough to chew or digest, and there is a risk of allergic reactions for individuals sensitive to shellfish. It is recommended to avoid eating raw or undercooked shells and to be cautious if there are any shellfish allergies. Shrimp shells are not high in calcium as some might think, and they may contain contaminants if not sourced or handled properly, so cooking thoroughly is important.
In summary, eating shrimp shells is safe when cooked properly, can be enjoyed for their texture and flavor, but individual tolerance and health conditions should be considered when deciding to consume them.