I also looked up castor oil. Thankfully, it comes from pressing castor beans...and that's all the info I'm going to search out! That's the beauty of the comments section...you learn a lot. Whether the info is to you liking or not doesn't matter, but talking to people is immensely important. From the Desiderata poem: 'listen to others, even the dull and the ignorant for they too have their story'.