IMO, pends on 3 major factors
First factor is Protein synthesis, while you're on roids or any other drug that increase your body's ability in using this Proteins, so more protein can be consumder
Second factor is body weight, there is no needing to mention the reasing
Third factor is digestion, if you're using digestive enzymes or taking certian types of foods that helps in protein digestion such as apple juice which is fulfill with Pectin will let your stomach break down Protein to Amino acids easily, that's you can be sure that's you're not going to loss much Proteins during the digestion process