I have been running yellow tops at 8iu a day for about three weeks now and gavent noticed any sides. My hands dont hurt or anything so is this a good or bad sign? I can get blues but what i dont like about them is that the powder is loose in the vial while the yellows are nitrogen filled and is a solid powder all together. My results so far is that i am loosing bf like crazy. I have veins in my abs that have never been there so i think they are legit. Should i try the blue tops? I get them both from the same guy and the blues are a lot cheaper. Any advice would greatly be appreciated. Thanks brothers