Hey guys, I was told by a friend who also takes protein that protein shakes are only useful if you drink them within 30 mins of mixing the powder with water. He claimed that the protein itself begins to alter after being in solution for 30 mins, rendering it less useful to the body. I have never heard such a thing, especially since I am a Biomedical Science student, although I am used to working with DNA and the like, not modified whey based protein blends. I am using ON Nutrition 100% Gold Standard Whey. I feel he may be getting his information confused with the 30 minute time zone post workout in which you are apparently recommended to consume protein to maximise recovery. It seems silly what he is saying as protein doesnt just spontaneously change when in the body, it requires enzymes and organelles/heat so I dont see why it should change when in water (unless something remains in the powder from the manufacturing process which could alter it once it is rehydrated).
I guess my first question is: Is a protein shake which was mixed with water (obviously re-shaken just before drinking) over 2 hours ago just as good for you as one which was mixed with water 5 minutes ago? How long after being added to water is the shake nutritionally useful? Does it change the longer I leave it in water?
I often mix my protein shake before I go to the gym so there are no chunks in it for when I am finished, so I just give it a quick shake and hey presto, its the most drinkable it gets. Secondly, I sometimes mix 3 scoops with 24 fl oz of water and drink it on the go with my small meals when at work (I am working as a waiter over the summer and the food is relatively protein poor, so I choose to bolster my protein intake with a couple of doses throughout the day).
My second question is: Is my consumption of protein shakes in the day while I am working useful at all or am I just pouring money down the drain?
My third question: If I make a protein shake with 3 scoops, taking one after the gym, going straight to work, having one about 3 hours after the gym, then one at the end of my shift which would be about midnight-1am is the shake still going to be the same shake around 6 hours after it was first added to water, or will the protein have changed into something less desirable or less optimised for consumption?
Any answers are greatly appreciated, obviously I can answer questions about Biomedical Science (and provide information through reading research journals supplied by my university) out of anyones curiosity in return, I just find my questions are going to be best answered by you guys rather than trawling through unfamiliar texts at university myself! Just as a bit of info, I train 3-4 times a week and live between 2 houses, a job, a university course and a family - my life is quite hectic, so it is tough getting the protein from proper food, as I never know where I will end up! I usually go to the gym shortly before work and try to take a snack like a sandwich and some stolen food when I am working. I am intolerant to a lot of protein powders and I guess I got lucky with this one, but it does have lactase and protease in the powder, so could it be breaking down the protein in the drink to something simpler while its sitting there or is it fine and I have nothing to worry about?