Read the Steroid Newbie Thread. It has all the information you’re asking.
I will second the last post.
First off, do what they say and read that. Secondly, post your age and training experience so the people on here have more info to better understand your situation. Thirdly, deca and trenbolone are both injectable whereas d-bol is an oral as well as winny, unless it is the injectable version of either one. Also, trenbolone and deca also can act as progestins (see, bigger words) in your body which affects YOU…