A lot of people go 8 weeks on dbol
If your new to this maybe 6 weeks is good. If your so worried about safety on your body why are you getting involved in this. We all know of the risks and what happens if you abuse them. But you seem freaked out about your health.
Shit I do the Arnold dbol way and every other cycle I eat all 50mgs before I go to the gym. The other cycles I break it up