Certified Lactation Specialist Lactation Specialist Nutrition for Lactating Mothers & Infants 2 — Questions and Answers
Question 1: Which micronutrient is most likely to be deficient in the breast milk of a vegan lactating mother who does not supplement?
- Vitamin C
- Vitamin B12 (Correct answer)
- Folate
- Iron
Correct answer: Vitamin B12
Vitamin B12 is found almost exclusively in animal products, so vegan mothers must supplement to ensure adequate levels in breast milk.
Question 2: A breastfeeding mother asks if she can drink alcohol occasionally. What is the safest evidence-based recommendation?
- No alcohol is safe during breastfeeding under any circumstances
- One drink is acceptable and pumping afterward removes alcohol from milk
- Waiting 2–3 hours per drink before nursing allows alcohol to clear the milk (Correct answer)
- Alcohol has no effect on breast milk composition or infant sleep
Correct answer: Waiting 2–3 hours per drink before nursing allows alcohol to clear the milk
Alcohol peaks in breast milk 30–60 minutes after consumption and clears at roughly the same rate as blood; waiting 2–3 hours per standard drink is the safest approach.
Question 3: What is the recommended daily iodine intake for lactating women according to the US Dietary Reference Intakes?
- 90 mcg/day
- 150 mcg/day
- 290 mcg/day (Correct answer)
- 350 mcg/day
Correct answer: 290 mcg/day
Lactating women need 290 mcg/day of iodine, the highest requirement across all life stages, to support infant thyroid function and neurological development.
Question 4: A mother's breast milk appears greenish-blue at the start of a feeding session. What is the most likely explanation?
- Bacterial contamination requiring the milk to be discarded
- High fat content characteristic of hindmilk
- Watery foremilk with higher whey protein content (Correct answer)
- Elevated bilirubin transfer from the mother
Correct answer: Watery foremilk with higher whey protein content
Foremilk at the start of a feeding is thinner and can appear bluish due to lower fat and higher whey protein concentration compared to hindmilk.
Question 5: Which fatty acid found in breast milk is critical for infant retinal and brain development?
- Linoleic acid (LA)
- Alpha-linolenic acid (ALA)
- Docosahexaenoic acid (DHA) (Correct answer)
- Eicosapentaenoic acid (EPA)
Correct answer: Docosahexaenoic acid (DHA)
DHA is a long-chain omega-3 fatty acid that accumulates in the brain and retina during fetal and infant development, and its breast milk content reflects maternal dietary intake.
Question 6: A lactating mother who rarely eats dairy or fortified foods is most at risk for passing low levels of which vitamin to her infant?
- Vitamin A
- Vitamin D (Correct answer)
- Vitamin E
- Vitamin K
Correct answer: Vitamin D
Vitamin D is naturally low in breast milk regardless of maternal diet, and maternal deficiency further reduces levels, which is why universal infant supplementation is recommended.
Question 7: Which statement about caffeine and breastfeeding is accurate?
- Caffeine is completely contraindicated during breastfeeding
- Up to 300 mg/day of caffeine is generally considered safe for most breastfeeding mothers (Correct answer)
- Caffeine is excreted in breast milk at higher concentrations than in maternal blood
- Caffeine intake has no effect on infant sleep patterns
Correct answer: Up to 300 mg/day of caffeine is generally considered safe for most breastfeeding mothers
Moderate caffeine intake of up to 300 mg/day (about 2–3 cups of coffee) is considered safe; only about 1% of maternal caffeine passes into breast milk.
Certified Lactation Specialist Lactation Specialist Nutrition for Lactating Mothers & Infants 2
Which micronutrient is most likely to be deficient in the breast milk of a vegan lactating mother who does not supplement?