Colostrum (also known as beestings or first milk or "immune milk") is a form of milk produced by the mammary glands of mammals in late pregnancy. Most species will generate colostrum within one day of giving birth. [Wikipedia]

Colostrum is a pre-milk fluid secreted by a mammalian mother after giving birth during the first 24-36 hours of lactation.

However, as human colostrums is not readily available, we have to rely on other sources. Research has shown that colostrums from dairy cows (bovine colostrums) is very similar to human colostrums and is a safe alternative. In fact, it has been reported that bovine colostrums is up to forty times richer in immune factors compared to human colostrums.