A unique source of immunoglobins as found in the first milk of mammals. Nature's Farmacy Colostrum is bovine, it is always collected on the 1st and 2nd milking with 90% collected at first milking. It is pasteurized at the low temp of 145 degrees for three minutes (batch never exceeds 145 so as not to damage proteins). 55 grams imunoglobulins per dose . The farms providing the Colostrum never use hormones or antibiotics. The Colostrum is tested at least 6 times per year for exposure to pesticides. Not all cows are grass-fed, but grass-fed cows are preferred. owder stirs in food or cereal or dissolves to use orally. Suggested feeding rate: Ingredients: 100% Bovine Colostrum Suggested Usage: 1/4 tsp per 10# of body weight.