For hair loss from test, you can use proscar. It will not work for dbol though and may have a reverse effect with tren. Nizoral shampoo may help with the DHT from test, but probably wont have an effect on the dbol or tren. The only way to really be safe here, would be to not use dbol or 19 nor based drugs. Instead, run something like test and EQ. EQ is pretty mild on the hair and the DHT con be controlled by proscar. Even then, this isn't a promise that the steroids won't have an effect on your hair loss. Some of us are more prone than others. Sounds like you just have some bad luck when it comes to this side effect. Your safest bet would be to start reading about gear like anavar, that is considered mild on hair