L-Lysine Supplement

L-lysine supplements at standard doses (500–1000mg/day) are considered safe while breastfeeding. Lysine is an essential amino acid found naturally in many foods (meat, dairy, legumes). It's commonly taken to prevent cold sore (herpes simplex) outbreaks. Since lysine is a normal component of breast milk protein, supplementation at typical doses is not a concern.

Always confirm with your doctor or lactation consultant before making dietary changes while breastfeeding.