I ran both together back in the day. And no test, lol. I didn't know any better. I would buy whatever the douchebag in the gym had. He didn't tell me anything useful. I didn't suffer the horrible prolactin related sides like you'd think. Probably because one or both the deca /tren were bunk tho. It's not a good idea because number one it's counter productive. Deca is going to bloat you badly, tren will harden u up. If you want to run nandrolone with tren why not NPP? Second reason, they are both 19-noretestosterones, they'll compete for the same receptors. Over saturation=wasted gear! Number 3, you are running the risk of nasty prolactin sides. Yeah, sure you can run caber or letro but why bother even attempting to run the two together? Why not a 19-nor and a DHT? How about tren and mast a or deca and mast e? With test of course.
Then we have benefits for the dieting athlete, but in most cases, when it comes time to cut this will not be a steroid we can expect to provide very much in most cases. There are many steroids from which we have to choose, and the majority will find other options to meet their cutting needs with greater efficiency; however, as always there are exceptions. dianabol as such a tremendous strength increaser can be used as an excellent strength preserver and even a tissue preserver to a degree. Some athletes may find a use for this steroid during the cutting phase, especially those of a competitive bodybuilding nature early on in a diet.