No. You *should* be fine. Just don't make it on Tuesday and drink it on Friday. You don't want to know 1) the smell and 2) the weird looking green fungae growing in it
Also, when you mix it in the a.m., add some ice cubes to it to keep it cool and try to keep it in the fridge as well
I am Adam, Prince of Eternia, defender of the secrets of Castle Greyskull. This is Cringer, my fearless friend. Fabulous secret powers were revealed to me the day I held aloft my magic sword and said: "By the power of Greyskull, I have the power!" Cringer became the mighty Battle Cat, and I became He-Man, the most powerful man in the universe.
In order to succeed, your desire for success should be greater than your fear of failure
Its a bad idea...Im not sure effectiveness wise, but i know from experience that it tastes horrible premixed! Why dont you get one of those pill cup things...they are a tupperware type container for pills, mine hold one scoop of protien powder.