It's the active ingredient in Tucks and other similar remedies. I learned this years ago when my youngest son was born. Boy, was I glad when the nurse gave me that info - it's much more affordable than the name brand products. A couple of months later, my baby had a severe bout of diarrhea and screamed when I tried to clean off his poor poopy bum with baby wipes. I felt horrible, I never knew what I ingested that caused such a reaction in him (I was breastfeeding at the time), but the skin on his bum looked almost like it had chemical burns. I poured witch hazel on a soft paper towel and let it sit on his skin for a few minutes, it soothed him immediately and healed quickly.