Is breast milk formed from a mother's blood?

Patient's question:

I always hear people say that breast milk is formed from a mother's blood, but it doesn't seem very scientific. Is breast milk really formed from a mother's blood?

Doctor's answer:

According to traditional Chinese medicine theory, breast milk is the mother's blood, which is reasonable. Based on the fact that breast milk mainly contains all types of immunoglobulins, breast milk has the highest nutritional value. When the baby suckles the nipple, the stimulation is transmitted to the pituitary gland and produces hormones called prolactin and oxytocin. Prolactin conveys the command to transform blood into breast milk, while oxytocin plays a role in promoting the release of breast milk accumulated in the milk ducts.

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