International Board of Certified Lactation Consultant (IBCLC) Practice Exam

Which of the following herbs is commonly known to reduce milk supply?

1. Ginger

2. Sage

3. Thyme

4. Oregano

The correct answer is: Sage

Sage is known for its ability to reduce milk supply, making it an important herb to consider in the context of lactation and breastfeeding. This is largely due to its active compounds, such as thujone, which can influence estrogen levels and impact breast milk production. Some traditional practices and herbal medicine recommendations suggest that sage may be effective in decreasing lactation when needed, for instance, during weaning or when milk supply is excessive. Herbs like ginger, thyme, and oregano do not have the same established effects on milk supply. Ginger is often more associated with digestive benefits and is thought to have a balancing effect rather than suppressing lactation. Thyme is sometimes used for its antimicrobial properties and does not significantly impact milk production. Oregano, while aromatic and flavorful, does not possess known qualities that would specifically reduce milk supply. This highlights sage’s unique role in the discussion of herbs affecting lactation.