Review Question - QID 212367

A 28-year-old gravida 1 para 1 woman is being seen in the hospital for breast tenderness. She reports that both breasts are swollen and tender. She is also having difficulty getting her newborn to latch. The patient gave birth 4 days ago by uncomplicated vaginal delivery. During her pregnancy, the patient developed gestational diabetes but was otherwise healthy. She took folate and insulin. She attended all her pre-natal appointments. Her temperature is 100.4°F (38°C), blood pressure is 113/76 mmHg, pulse is 88 beats/min, and respirations are 12/min. Bilateral breasts appear engorged and are tender to palpation. There is no erythema, warmth, or induration. A lactation nurse is brought in to assist the patient and her newborn with more effective breastfeeding positions. The patient says a neighbor told her that breastmilk actually lacks nutrients, and she asks what the best option is for the health of her newborn. Which of the following components is breastmilk a poor source of?