Unlike fat, protein cannot be stored. When it is consumed in excess of our needs, protein is broken down mostly by the liver, and partly by the kidneys and muscles. Consumption in excess of our needs overworks the liver and kidneys, and can cause accumulation of toxic protein byproducts.
Proteins are made of amino acids, and are, therefore, acidic by nature. Animal proteins are abundant in sulfur-containing amino acids which break down into very powerful sulfuric acid. These kinds of amino acids are abundant in hard cheese, red meat, poultry, seafood, and eggs, and their acids must be neutralized by buffers found in the bones. The bones dissolve to release the buffering materials; eventually resulting in a condition of weakened bones, known as osteoporosis. Released bone materials often settle and coalesce in the kidney system, causing kidney stones. Fruits and vegetables are largely alkaline, preserving bone health and preventing kidney stones.13 (A more detailed discussion of the health consequences from excess protein is found in my January 2004 newsletter article: Protein Overload.)
Diseases of over-nutrition are directly connected to planet health, too. Recommendations to eat animal foods for protein have resulted in an environmental catastrophe. Livestock produces 18% of the greenhouse gases; these food-animals occupy 26 percent of the ice-free surface of the Earth and 33 percent of the total arable land is used to produce their food. One telling tragedy is they account for the deforestation of 70 percent of Amazon rainforests, which act as the "lungs of the Earth."14 (A more detailed discussion of the environmental damage from livestock is found in my December 2006 newsletter article: An Inconvenient Truth: We Are Eating Our Planet To Death.)" here is the correction to his statement
This is as close as he got to the facts. It is true that an excess of protein can put more of a strain on the liver and kidneys. Especially the kidneys, which is one of the reasons the US has such as high incidence of kidney disease. Americans tend to consume way too much protein and fail to drink enough water. This leads to less of a conversion of uric acid, a protein breakdown product, in to urea. If this occurs the non-hydrolyzed uric acid can pass through the kidneys as sharp crystals cutting up the kidney tissue leading to kidney disease. I have also talked to people who could not control their body odor. When their diet was checked I found that they were consuming excessive amounts of protein. A breakdown product of the amino acids in protein is ammonia. This not only puts a strain on the liver, but ammonia is highly toxic to the brain as well. So the body does what it can to process the ammonia or otherwise eliminate it. Most of the ammonia is converted back in to uric acid, which is hydrolyzed in to urea and passed off as urine. In excess the ammonia compounds can be excreted through the skin where they react with bacteria on the skin releasing the ammonia, and thus creating more body odor. Protein is also harder for the body to break down than carbohydrates or fats requiring much more energy to process. This is why high protein meals can make us tired and reduce our energy levels.