The term serum is a term that is used to designate some types of liquids with specific characteristics and uses. In this sense, the serum can be a saline solution that is used in medicine as a nutritional supplement for convalescent people or animals. Whey is also the liquid that remains after separating the fat from products such as milk or blood.
If we seek to define serum in general terms, we must say that it is always a liquid that has lost its fattest or heaviest elements after some process of separation or alteration of the previously existing product. This is especially visible in the case of milk or blood, both liquids that are composed of different elements and that in the event of certain alterations can be separated into two parts: the main material (in the case of milk, fat or in the case of blood, clots) and fluid that is much lighter and contains another proportion of nutrients. These types of serums can be separated for specific purposes, to perform certain tests (in the case of blood) or for certain types of recipes (in the case of milk).
However, the serum can also be something artificially created. This is the case of serum as a saline solution that is used both in medicine and in veterinary medicine. This serum is a saline liquid that is composed mostly of water and that contains various types of nutrients applied to the water in a useful dose for convalescent individuals or animals. The main objective of this type of serum is to allow the individual or animal in question to continue receiving essential nutrients and minerals even when their particular condition does not allow them to feed themselves.
