Colostrum Powder

Do cows product colostrum only after giving birth ? If so, then if humans are consuming this and products are being made from it, then aren't we taking away an important nutrient for the calf?

What is the best colostrum product? can bovine colostrum help pregnant mothers?

Have you tried colostrum for to recover for lifting? Has anyone ever tried bovine colostrum for lifting, i heard it was high in igf-1. If so could you reccommend a product.