“…However, the blood of livestock and poultry, which represents one of the main byproducts in the slaughtering industry, has not yet been fully investigated and utilized. These abundant blood resources have great application potential in food and pharmaceutical industries because of their rich nutrients and bioactive components, including albumin, globulins, fibrinogen, enzymes, ferroheme, small metabolic molecules, inorganic salts, etc. , In some countries and regions, the healthy blood of several species of livestock and poultry has been made into traditional foods, such as blood curds, black sausages and blood puddings and desserts, food processing aids and additives, including alcohol clarifying agents, food binders, and food emulsifiers, and useful fine chemical products, such as ferroheme, plasma protein powder, nitrosohemoglobin, bioactive peptides, etc. , In many other countries and regions, however, the blood resource of livestock and poultry has not been effectively utilized, most of which is used as low-value-added animal feed or directly discharged into the environment. , This mainly involves the lack of related eating habits, in-depth knowledge, or intensive processing technologies, causing a waste of resources and the problem of environmental pollution. Moreover, more other bioactive components in those blood resources have not yet been fully explored and utilized.…”