Board Thread:General Discussion/@comment-27907368-20160528162922/@comment-27620479-20160611210053

It is not the only time. Practically everyone uses healing before Asriel's fight, they just don't do 19 HP ones. There are even attacks designed to heal you. What we don't see is monsters healing themselves. They only heal the protagonist.

Also, it seems to heal the soul, not the body. Because I really doubt there were enough buttercups in the underground to get a dose that at least two 19 HP or over heals, and a pie that has who knows how much full healing slices, can't keep up with. The recipe was supposedly available before Chara's health, given that it was the basis of the whole buttercup thing. But even if we assume it wasn't there is the snail pie, which is almost that good. And a bowl of free monster candies. And a royal treasury to spend on spider items.