With the chance that most if not all fo's have some amount of vanilla in them, is there any harm in adding vanilla stabilizer to every batch? With some of my recent batches, we did get some darkening, which is fine for most of them as they are supposed to be brown or tan, but my beautiful banana now looks like it's a banana that's been out in the sun WAY TOO LONG. Cost wise, it's only an extra $.50 or so per ounce... which it a lot better than wasting an entire batch of soap. Your thoughts?