CNB001 – What is Colostrum?

Colostrum is the first milk (or, more correctly, the first secretions) from the udder after the cow gives birth to the calf.  It is very different from regular milk – that’s why we don’t refer to it as “milk”.  Colostrum has about two times the solids, five times the protein, and more than twice the fat compared to regular milk.  It’s chock full of vitamins and minerals, too.  And – it has huge amounts of small proteins called growth factors that jump start the calf’s metabolism.  Most importantly, though, are the immunoglobulins.  Colostrum contains several immunoglobulins – IgG, IgM, and IgA are key.  The IgG are absolutely critical to the health of the calf, and they are the reason that we must feed colostrum as soon as possible after the calf is born.

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