I'm sorry for this obvious question but here it is... how long are the Whey protein good for after mixing it with water etc? I usually put a scoop inside an empty water bottle and add water when it's time to drink. Would it get all lumpy after 4-5 hours, if I mix it at home before leaving for the gym?
if you are doing it with water i would let it go overnight. it might settle out a little bit so before you drink it you might have to shake it up a little bit
You should treat mixes protein powder like you would milk. So 4-5 hours in the fridge would be fine, 4-5 hours outside of teh fridge not so much