One of my vials of testosterone undecanoate crashed and before tossing it in the trash I thought I would ask if anyone else had trouble with this ester before. I have had TNE and ONE crash before but those are fast esters and can be unstable but are fairly easy to fix. Undecanoate is what I have been trying out for my TRT because that I find CYP can fit hard and then fade away so my test levels can be all over the place over the course of a week. Now to my question ( what do you think caused the gear to crash or could this be something other then what is printed on the label). I will post a picture of two vials that were stored in the same manner and are from the same order and batch number.