Protein:
Whey protein has high surface area. Oxygen, & water vapor slowly diffuse through the plastic packaging naturally, you simply sped this process up. There is definitely some chemical degradation of the proteins, and their amino acids. You can get denaturation, cross linking, and other reactions.
The packaging it was kept in plays a very key role in this. I wouldn't necessarily assume it's beyond use, but wouldn't regard the gram count per scoop to be accurate either.
Creatine:
From what i've read over time heating of the solution of creatine within water will increase the solubility. However I havent the slightest clue as to whether heating the raw creatine initially would in any way be benificial. Keeping in mind that when the creatine solution i mentioned earlier is heated it has a tendency to convert to creatinine, which is energetically useless to muscle. so hopefully the same isnt true for the powder!!
Love to hear from one of the many chemists that usually offer a solution!
