It is increase the lung capacity to enable you to sing. I do like this mint refreshing relief of the throat before singing or using voice for long time. It keeps the throat sooth. The effect last for about 3-4 hours. It doesn't change your pitch to octave. It does help to have more 'power' to sing songs. Since I can't sing at all, this helps me to sing some classic but of course I still can't pull that "I will survive" song.
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