Yes, you heard right! Let me preach on it: I know ketones (great band name!) are chemicals produced by your liver. But according to this article key tones - C, F#, B flat, etc - can be used as fuel! Who knew? But does your body turn certain frequencies into fuel or do you literally eat the keys? I know A flat really sticks to my ribs on a cold winter day. 88 grand piano keys seems like a meal fit for a king! Tiny toy piano keys for the kids? Regardless it's intriguing and as soon as a few celebrities are on board it's sure to be a success. http://www.wrdw.com/content/news/Ketogenic-fad-diet-could-be-harmful--492343211.html “Something called the keto flu is going to happen. That’s whenever your body is adjusting to using key tones instead of glucose review. What happens there is you may experience sweating, irritability, just to name a few issues,” explained Andy Yurechko, with Augusta University.