Miracle potion :D

So recently i asked a question about the proper usage of glutamine, i came up with drinking it before i go to bed, but i didn't like it and i decided to drink it as a pre- workout supplement. So what im doing for the past week is before workouts i drink a cup of coffe and 5 grams of glutamine powder. I thought nothing will change, but when i feel really tired, before workouts i drink coffee and the glutamine and i am full of energy (because of cofein probably, but when i was drinking coffee only i didnt get so great evergy). So the first time i used this mix was before my arm workout, i couldnt believe what i could do, last week i was struggling in doing dips with 15 kg 5x10 ( tried to achieve this for like a month), but then suddenly i was able to do 5x10 with 19kg, i dont know how? All the other exercises seemed to be really easy too and i was able to inrease the weight in every single exercise. I thought it was just 1 time, but i have been drinking this for a week and every single workout is much better than it was last week. Explanation? Just came back from my chest workout - broke all my records in chest exercises!

Yes the first thing i thought after the workout was the placebo effect, but no i didnt even think something would happen, because i really dont believe so much in supllements. But nothing like this happened when i was using only coffe.

Ye but it says on my glutamine bottle, that it helps strenght and immune system.

whats the name of the brand?