The most abundant source of colostrum today is from dairy cattle. Transfer factor can be extracted from colostrum by molecular filtration, and all of the milk proteins removed. Since everything is removed from the molecules there is nothing to cause adverse reactions. The molecules are then put into a capsule making this the first oral transfer factor. By doing this it has made transfer factor available to the general public at a very reasonable price.
Transfer factor is an immune system modulator.
In other words if a substance produces differential responses from the different classes of the immune cells it indicates that the substance is an immune modulator rather than an immune stimulator or suppresser. Strict immune stimulation can exhaust the immune system, and strict suppression can lead to ineffectiveness. Transfer Factor TM and Transfer Factor Plus TM both act as immune modulators. They are complete preparations that include all fractions of the immune system. Both preparations have demonstrated different affects on various immune cell populations which is in keeping with the differential transfer factor functions.