The worst / most pronounced GH side effects came when I was prescribed GH for a clinical deficiency, at a whopping 1.8 iu daily. had bad CTS for weeks, wrist / finger swelling, etc. It went away eventually, and when I decided to increase my dose (slowly) over many months to 4 iu and then 5 iu, I only experienced the sides transiently. IGF-1 has a nearly 2-day half-life so unless you start a new batch that is grotesquely over or under-dosed and / or take many weeks off, you likely wont get bad side effects (though there is quite a bit of variability from person to person on this). End of the day, WWB is a pretty good outfit. I'd be very skeptical that an entire batch is bunk, but what CAN happen with any UGL GH is that one vial here and there can be very under-dosed and / or have markedly lower purity.