The blood of horseshoe crabs has no effect on people if they drink it, and the blood of horseshoe crabs contains a lot of bacteria, which may cause diseases after people drink it.

The blood of horseshoe crab is very useful in medicine and can be used to treat infectious diseases and blood diseases. . The amebocytes in the horseshoe crab's blood can release coagulant proteins that quickly coagulate bacteria in the blood, thereby controlling the disease; the blood of horseshoe crabs is rich in platelets, which can effectively improve the conditions of thrombocytopenia, leukemia and other diseases.