I remember in 2011 reading with great interest some research into nootkatone[1] as a mosquito repellent[2] (which has already been shown to be effective against

I remember in 2011 reading with great interest some research into nootkatone[1] as a mosquito repellent[2] (which has already been shown to be effective against ticks). It is a non-toxic oil found in grapefruit and is already approved by the FDA as a food additive. Unfortunately, I haven't seen anything (read: consumer-available products) come of it. Upon a bit of searching, I found a patent[3] for a nootkatone-based insect repellent... filed in 1998! [1]: http://en.wikipedia.org/wiki/Nootkatone http://en.wikipedia.org/wiki/Nootkatone [2]: http://www.npr.org/2011/04/18/135468567/repelling-bugs-with-the-essence-of-grapefruit http://www.npr.org/2011/04/18/135468567/repelling-bugs-with-... [3]: http://www.google.com/patents/EP1033076A1?cl=en http://www.google.com/patents/EP1033076A1?cl=en