RD - Commission on Dietetic Registration (CDR) Practice Test

Which nutrient should a pregnant woman avoid excessive intake of?

1. Vitamin A

2. Vitamin B-6

3. Folic acid

4. Iron

The correct answer is: Vitamin A

During pregnancy, it is crucial for women to ensure they consume a balanced diet that supports fetal development while being mindful of certain nutrients that can be harmful in excessive amounts. In the case of Vitamin A, excessive intake can lead to teratogenic effects, meaning it can cause developmental malformations in the fetus. High doses of preformed Vitamin A, often found in some supplements and animal liver products, have been associated with increased risk of birth defects. In contrast, other nutrients like Vitamin B-6, folic acid, and iron generally have recommended upper limits that are significantly higher than what most pregnant women would consume through diet alone. Folic acid is particularly emphasized for its critical role in preventing neural tube defects and is typically supplemented during pregnancy. Vitamin B-6 is important for overall health during pregnancy and is not known to cause adverse effects at higher intake levels. Iron is also vital for increasing blood volume and supporting the developing fetus, and women often need to increase their intake rather than avoid it. Thus, careful management of Vitamin A intake is essential during pregnancy to mitigate any potential risks to the developing fetus, making it the nutrient to avoid excessive intake of.