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why we need protein in our body

Many people who have jumped on the high-protein/low-carb bandwagon think that they can pack away as much protein as they like. But
experts urge caution. The reasons why have to do with how high-protein/low-carb diets are thought to lead to. When people eat lots of protein but few carbohydrates, their metabolisms change into a state called. Ketosis means the body converts from burning carbs for fuel to burning its own fat. When fat is broken down, small bits of carbon called are released into the bloodstream as energy sources. Ketosis, which also occurs in, tends to suppress appetite, causing people to eat less, and it also increases the body's elimination of fluids through urine, resulting in a loss of water. Christopher D. Gardner, PhD, assistant professor of medicine at Stanford University in Palo Alto, Calif. , tells WebMD that high- like the regimen may trade short-term benefits for long-term health consequences.

Among the risks: The body produces when it breaks down protein. No one knows the long-term risks of higher levels of ammonia in the body. Also, there is evidence to suggest that people who eat high- typically excrete excess in their urine, says Deborah Sellmeyer, MD, assistant professor of medicine and director of the Center for at the University of California at San Francisco. This suggests that the body is releasing stores of into the bloodstream to counteract an increase in acids caused by protein consumption ( buffers, or neutralizes, acids). Too much calcium loss could lead to down the road, Sellmeyer says.

Lastly, there are the obvious concerns. Carbohydrate foods shunned by some people on low-carb diets include, which are the best sources for, fiber, and -- that help prevent disease. By contrast, animal foods that are high in protein are usually also high in, which increase the risk for, and several types of. The American Association warns: "Reducing consumption of [carbs] usually means other, higher-fat foods are eaten instead. This raises even more and increases cardiovascular risk. " The AHA also notes that by concentrating on protein sources and skipping carbs, dieters may be getting too much salt, and not enough calcium, or, which are typically found in fruits, vegetables, and whole grains. Antibodies are proteins that are important for immunity.

When harmful viruses and bacteria, called antigens, invade your body, antibodies destroy them. This protects you from sickness and disease. Proteins exist as hormones, regulating specific body processes. Hormones are carried by the bloodstream to a particular site in the body that needs regulation. For example, in response to varying blood sugar levels, the hormone insulin is released, which helps to regulate and maintain proper energy utilization. Proteins also play important roles in blood clotting and vision. Additionally, they help proteins regulate the acid-base balance in the body by acting as buffers. Proteins function as enzymes, facilitating chemical reactions in the body, such as the breakdown or build up of substances in the body's metabolism.

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