Menthol in small, occasional amounts is generally considered safe while breastfeeding, but there are two real concerns worth understanding: it may reduce milk supply at higher doses, and menthol vapors can affect infant breathing if applied near the baby’s face. The key is the form you’re using it in and how much you’re exposed to.
The Milk Supply Concern
Peppermint and its active compound, menthol, have a long and somewhat contradictory reputation in breastfeeding. Some cultures use mint to improve milk quality, while others use peppermint specifically to suppress lactation when weaning. Lab studies support the suppression side: menthol reduced milk production in cell cultures and in mice. But no clinical trials have confirmed this effect in humans, and researchers note it’s unclear whether typical everyday intake of peppermint or menthol is enough to meaningfully lower supply.
That said, lactation consultants and resources like KellyMom consistently advise against consuming large amounts of menthol, noting that it can reduce milk supply. “Large amounts” is the operative phrase. A couple of cough drops when you have a sore throat is a very different exposure than drinking multiple cups of strong peppermint tea daily or using concentrated peppermint oil supplements. If you’re already struggling with low supply, even moderate menthol intake is worth being cautious about.
Cough Drops and Lozenges
Menthol cough drops are one of the most common reasons breastfeeding parents search this question, usually because they have a cold and want relief. Sore throat sprays and lozenges are generally considered safe during breastfeeding, and a few menthol cough drops per day are unlikely to cause problems. The concern kicks in if you’re going through a bag a day or relying on them heavily for an extended period.
If you want to avoid menthol entirely, slippery elm bark is a well-regarded alternative for sore throats. It’s available in herbal cough drops and throat lozenges, though you should check the other ingredients in any product you choose. Honey and warm saltwater gargles also work well for throat irritation without any supply concerns.
Topical Menthol and Vapor Rubs
This is where the safety picture shifts. Products like mentholated chest rubs, muscle balms, and vapor inhalers deliver concentrated menthol through the skin and as fumes. Two specific risks apply here.
First, do not apply peppermint oil, menthol, or camphor on or near your breast. If your baby nurses on skin that has these substances on it, they could ingest them directly. Even residue from a chest rub applied hours earlier can linger.
Second, menthol vapors pose a breathing risk for very young babies. Research has shown that menthol inhalation can trigger brief pauses in breathing (apnea) in newborns. This is a reflex response, and while it’s been studied primarily in neonates and animal models, it’s a well-recognized enough concern that pediatric guidance consistently warns against using mentholated products on or near infants and young children. If you use a vapor rub on your own chest for congestion, the fumes your baby breathes during skin-to-skin contact or nursing could be an issue.
A practical workaround: apply chest rubs or mentholated balms to your back rather than your chest, and wash your hands thoroughly afterward. Better yet, use a steam inhaler or humidifier away from your baby to get the decongestant benefit without exposing them to concentrated vapors.
Peppermint Tea and Food Sources
A cup of peppermint tea here and there is a very low dose of menthol compared to supplements or concentrated oil. Most breastfeeding parents can enjoy occasional peppermint tea without any noticeable effect on supply. The risk increases with regular, heavy consumption, such as several strong cups daily. If you notice a dip in supply that coincides with increased peppermint intake, it’s worth cutting back to see if things improve.
Peppermint-flavored foods like candy canes, gum, or ice cream contain even less menthol and are not a realistic concern.
What Actually Matters
The practical takeaway is that menthol exists on a spectrum of exposure, and most common uses fall on the safe end. A few cough drops, a piece of peppermint gum, or an occasional cup of tea are fine for the vast majority of breastfeeding parents. The things to genuinely avoid are concentrated peppermint oil supplements, heavy daily peppermint tea consumption if you’re concerned about supply, and any mentholated product applied to skin your baby will touch or close enough for them to inhale the fumes. Keep menthol-containing balms away from your chest and away from your baby’s skin entirely, and the most meaningful risks are off the table.