this is, of course, true.
but check out this consumer report thing, shows that some protien powders have the maximum daily allowance of toxic chemicals (like lead) in one scoop. If your taking 3-4 scoops a day for years you could have a problem.
http://www.consumerreports.org/cro/m…rink/index.htm
thats just another reason why it may make sense to change brands now and then, then go back to your fav
as far as caffine pills go, they can help me get thru a lot of cardio but i don’t see much of an edge for lifting.