Mutarotation: a sugar that spontaneously changes from sweet to bitter
Simple sugars can exist in multiple molecular conformations, some of which have different tastes and optical properties. Steve Mould's video on optical rotation: https://www.youtube.com/watch?v=975r9a7FMqc Reaction's video on Mexican Coke: https://www.youtube.com/watch?v=NY66qpMFOYo Research paper describing enzymatic synthesis of L-glucose: https://nopr.niscpr.res.in/bitstream/123456789/17714/1/JSIR%2061%285%29%20361-365.pdf D-mannose on Amazon: https://www.amazon.com/Micro-Ingredients-Mann