I would imagine like anything, over time the nutritional value, or the potency of the supplement will deminish. To what extent I don't know, but after two years I would just throw it out and buy some new stuff. It's fairly inexpensive anyway really for the improvments it could bring you
"But for a percentage of people, itís sickening. Boxing kills, MMA bleeds. And people are far more disgusted by the latter"