i have a question,A friend of mine has made some test 400,ive read where there is suppose to be pain etc but i have none but a soreish injection spot.i have took sustanan 275 before and feel the pain right after i lift but with this test 400 i dont get any pain or muscle tightness from the steroid. is this common. the bottle looks legit and in the botton is says from mexico and has denkalldawes website.. stc012 lot no ...anyone run across this or have any info i would love it. ive only been on this 2 days btw