Another reason weight loss is achieved on these high-protein diets, at least temporarily, is actually due to water loss. The increase in the amount of protein consumed, especially from meat and dairy products, raises the levels of uric acid and urea in the blood. These are toxic by-products of protein breakdown and metabolism. The body eliminates this uric acid and urea by pumping lots of water into the kidneys and urinary tract to help it flush out. However, a detrimental side effect of this diuretic response is the loss of essential minerals from the body, including calcium. The high intake of protein leaches calcium from the bones, which leads to osteoporosis.

Medical evidence shows that the body loses an average of 1.75 milligrams of calcium in the urine for every 1 gram increase in animal protein ingested. Additionally, as calcium and other minerals are leached from our bones, they are deposited in the kidneys and can form into painful kidney stones. If a kidney stone becomes large enough to cause a blockage, it stops the flow of urine from the kidney and must be removed by surgery or other methods.

Plant-based proteins, like that found in soy, lowers LDL cholesterol and raises HDL (the good) cholesterol. This prevents the build up of arterial plaque which leads to atherosclerosis (hardening of the arteries) and heart disease, thus reducing the risk heart attack and stroke. The amount and type of protein in your diet also has an important impact on calcium absorption and excretion. Vegetable-protein diets enhance calcium retention in the body and results in less excretion of calcium in the urine. This reduces the risk of osteoporosis and kidney problems. Interestingly, kidney disease is far less common in people who eat a vegetable-based diet than it is in people who eat an animal-based diet. By replacing animal protein with vegetable protein and replacing saturated fat with unsaturated fat, like that found in olive and canola oils, you can avoid the pitfalls of the typical high-protein diet. You will be able to improve your health and regulate your weight while enjoying a vast array of delicious, nutritionally dense, high fiber foods.

(Not necessarily my opinion but more information)