The way people use Dianabol these days is just insane, 40mg in a day and more. Maybe it's just me but if I take my Dbol 40mg a day I feel absolutely terrible, headache is insane and blood pressure so out of control. I have heard that there a lot fake Dbol out there and most likely the reason people use it so much these days is they take "Dianabol" that is actually Methyltestosterone which is way less powerful drug and cheaper to make. Real stuff also seems to be quite hard on at least my stomach as I get a lot of heartburn after taking so small quantities.
Although I am usually not inclined to posit speculations on why a particular drug does or doesn't do something, in this case I will. Im guessing that the higher doses of Anadrol cause enough appetite suppression (at least anecdotally) to make eating rather difficult. It can also increase insulin resistance and glucose intolerance (5). This has the effect of making macronutrient absorption more inefficient, and could also be a factor in reducing gains when the dosage goes over 100mgs/day. Unfortunately, Anadrol also has a reasonably profound effect on your body's natural hormonal system, on par with most other oral steroids , but not as bad as most injectables, and its certainly not as harsh on your lipid profile as many anabolics are