Question:
How long does the protein last?

I started using some bottled protein drinks like IsoPure Zero Carb and Designer Whey Protein Blast. These bottles have an expiration date but I was wondering once you open them how long is the protein good for, hours, days, a week? I know the powders once they are mixed should be drank with in the hour. Any ideas on these?    — Kelly T. (posted on February 5, 2003)

February 5, 2003
Once you open or a premade drink or mix a powdered drink the protein can begin to break down after about 30 minutes.
   — Linda A.

February 6, 2003
hiya..i actually have a question to your question...where is it shown how quickly proteins break down? and exactly what "breaks down"..is it the protein itself? (meaning, drinking a 30g protein shake within 30 minutes will be different than drinking a 30g protein shake after 30 minutes..?) i've heard this before but cannot seem to find any documentation to support the breakdown theory... thanks so much! kate
   — jkb