I just want to find an effective long term vehicle that does not have alcohol in it. linoleic acid and oleic acid are on my list, but I don't know if they will dissolve water soluble stuff like GTE. I'll find out soon. Glycerol is an option, though it is VERY greasy. I just don't know if PPG is bad. It can be swallowed safely, but there is no long term drinking data like there is with ethanol.