What are the differences in nutritional composition between colostrum and normal milk

The differences between colostrum and normal milk are mainly shown in the following aspects: 1) Colostrum contains large amounts of immunoglobulins, which play a key role in enhancing the disease resistance of calves. 2) Colostrum contains more magnesium salts, which give colostrum a mild laxative effect; when calves take in enough colostrum, it helps them pass meconium. 3) Colostrum has high acidity, and when it enters the calf's digestive tract it can inhibit the activity of harmful microorganisms in the stomach and intestines. 4) Colostrum contains higher levels of vitamin A and carotene, which play an important role in the health and development of calves.