It is generally advised to be cautious when using topical vitamin C serums like Numbuzin No.5 while breastfeeding, as there is limited specific safety data available.

⚕️ Safety Considerations

• The serum contains vitamin C derivatives and natural extracts, which are typically low risk when applied topically because minimal amounts enter the bloodstream.
• However, the product information suggests consulting a doctor before use if you are breastfeeding, to rule out any potential sensitivity or allergic reactions.
• Avoid applying near the breast area to minimize any chance of ingestion by the infant.

🩺 Recommendations

• Discuss with a dermatologist or your breastfeeding specialist before starting the serum.
• Monitor for any skin irritation or allergic reactions and discontinue use if these occur.
• Continue using gentle, well-established skincare products known to be safe during breastfeeding.

If you want, I can explain more about how topical vitamin C works and its absorption during breastfeeding.