Pigment may be used in these duck blood, and the change of characteristics after boiling leads to the discoloration of duck blood. It is best not to eat discolored duck blood.

Duck blood identification method:

(1) Buy duck blood, look at the color first. Real duck blood is dark red, and fake duck blood is generally brown.

(2) The real duck blood was degassed at high temperature during processing, and there was no fishy smell, but there was a duck fishy smell.

(3) After the fake duck blood is broken, there are honeycomb pores inside, and chemicals such as starch are often added during processing, so it is generally tough and can be stretched. Real duck blood is crisp.