Have pre workout supps changed??

[Rooney15]

So last year i tried C4 and earlier this year i tried assault, and both of them worked really well. Gave me really good focus and energy in the gym. Now for the past month i have tried white flood and c4 again and they barely do anything. I have zero caffeine/stimulant tolerance. When I tried c4 again all it did was make my face and arms tingle, which it did when i used to take it. But it gave me no energy or focus. Only thing it did was give me a bit of a pump. I have taken them on empty stomachs, as well as taking them after eating. Both did nothing. Have these supps changed at all the past year or so??? Taken ingridients out or something

[WholeEffinShow]

A lot of them no longer have the 1,3 dimeth. That could be a big part of it

[Rooney15]

yea, i remember the C4 having that in it. It used to give me crazy energy and focus but now its like.. blah.
Ill try 2 scoops next time i guess. I did 1 1/2 today and started to get the tingle feeling after like 10 minutes so i thought it was gonna work!

[WholeEffinShow]

The tingles are beta alanine.

1,3 was just a pretty good stimulant. Jut get something with caffeine creatine an the beta alanine and call it good