First in answer to both the above, i dont consume 800g of protein per day all year, nothing like that, its an example of a very heavy bulk. I stick at the much less excessive 2g/lb mostly. Dont get the idea that i advocate massive doses of protein as healthy, as granny always says "everything in moderation dearie"
heeed: You sound very biologically knowledgable m8, for your info i get bi-annual blood work done with emphasis on renal function, and this IS down to concern over my excessive protein cycles and also a lot of the supps i take. As well as the fact that im far from a tee-totaller so i like to keep it in check, thus far i have had 'perfect' results which I am reliably informed means that although i may well be exceeding certain perameters at certain times in a year i do NOT incur any lasting damage.
Will: Firstly, 50 years ago was a long time medically, and its all very well to say "ah you say that now but in 50 years the world will be flat". No it wont, and medicine and basic biological facts are not going to change. Biology and medicine 50 years ago was based on things that were often pure conjecture and often fiction. Many of the core principles of biology have since been proven and many will never change as they are simply FACT. 50 years ago cancer might well have been caused by fairies, as there was no other means to identify the cause. Now however we are aware of carcinogens, genetic pre-dispositions, mutations and many other actual things that are based in solid fact. So you can get as philosophical as you like about the future but you cannot say that because the human race of the 50's didnt know what caused a mysterious and fatal illness that the modern human cannot possibly comprehend the implications of something as simple as a high protein intake, its just not the same thing and somewhat akin to suggesting that we will figure out the earth is not a sphere one day, unlikely.
Secondly you talk about the liver as if damaging it is somehow mortally wounding. As one of the only major organs that is regenerable the liver is being damaged and repaired all the time, what you need to focus on is the loading perameters and whether they are being exceeded, i believe a protein intake of 4g/lb falls well withing the capabilities of the liver, i think if you throw other toxins and large amounts of alcohol on top THAT is where you will start to see problems arise, your average bodybuilder is unlikely to allow that however and any that do are highly foolish.
Finally if you labelling me as arrogant, or ignorant for that matter then maybe you should watch what you post as you risk being hypocritical, you're behaving as if you are right come hell or high water, giving little explaination for your views and have no other evidence to back them up. Lack of evidence is ignorance and preaching that which has no evidence is arrogant.
I am neither, im well informed and have evidence to back up anything that i have not clearly labelled as supposition.