Saponin which is contained in Horse Chestnut seeds (see specific info) and usual topically used as antivaricose and venoprotector. At latest update no published data on excretion into breast milk was found. A high molecular weight makes it unlikely its pass to breast milk in significant amounts.Do not apply on the chest or thoroughly clean it up before breastfeeding.The Commission E of German Ministry of Health has approved its use during lactation. Given its lack of toxicity at normal doses, a moderate consumption during lactation would pose a very low risk.